AN30 - Switching Regulator Circuit Collection
44
Application Note 30 AN30-1 an30fa February 1989 Switching regulators are of universal interest. Linear Technology has made a major effort to address this topic. A catalog of circuits has been compiled so that a design engineer can swiftly determine which converter type is best. This catalog serves as a visual index to be browsed through for a specific or general interest. Switching Regulator Circuit Collection John Seago The catalog is organized so that converter topologies can be easily found. There are 12 basic circuit categories: Battery, Boost, Buck, Buck-Boost, Flyback, Forward, High Voltage, Multioutput, Off Line, Preregulator, Switched Capacitor and Telecom. Additional circuit information can be located in the references listed in the index. The reference works as follows, i.e., AN8, Page 2 = Application Note 8, Page 2; LTC1044 DS = LTC1044 data sheet; DN17 = Design Note 17. FIGURE TITLE FIGURE # PAGE REFERENCE/SOURCE Battery 2A Converter with 150μ A Quiescent Current (6V to 12V) Figure 5 6 AN29, Page 9 200mA Output Converter (1.5V to 5V) Figure 6 7 AN29, Page 15 Up Converter (6V to 15V) Figure 7 7 AN8, Page 9/LT1013 DS Regulated Up Converter (5V to 10V) Figure 8 8 LT1018 DS Boost Converter (1.5V to 5V) Figure 9 8 AN15, Page 7/LT1018 DS Up Converter (1.5V to 5V) Figure 10 8 LM10 DS Single Cell Up Converter (1.5V to 5V) Figure 11 8 AN8, Page 8 The Low Quiescent Current Loop Applied to a Buck Converter (8V-16V to 5V) Figure 18 14 AN29, Page 12 Low Power Switching Regulator (9V to 5V) Figure 23 17 AN8, Page 4/LT1013 DS Micropower Switching Regulator (5.8V-10V to 5V) Figure 24 17 AN23, Page 15 Transformer Coupled Low Quiescent Current Converter (12V to 5V, ±12V) Figure 30 20 AN29, Page 13 800μ A Output Converter (1.5V to 5V) Figure 40 26 AN29, Page 14 Switching Preregulated Linear Regulator (9V to 5V) Figure 49 31 AN8, Page 5/LT1013 DS Micropower Post Regulated Switching Regulator (6V-10V to 5V) Figure 51 32 AN23, Page 16 Generating CMOS Logic Supply from 2 Mercury Batteries (2.4V to 4.8V) Figure 71 38 LTC1044 DS Battery Splitter (9V to ±4.5V) Figure 72 38 AN8, Page 2/LTC1044 DS Regulated Voltage Up Converter Figure 76 39 AN8, Page 7/LTC1044 DS Boost Boost Converter (5V to 12V) Figure 1 5 AN19, Page 13/AN25, Page 2/LT1070 DS Voltage Boosted Boost Converter (15V to 100V) Figure 2 5 AN19, Page 37/LT1070 DS Current Boosted Boost Converter (16V-24V to 28V) Figure 3 5 AN19, Page 40/LT1070 DS Negative Boost Regulator (–15V to –28V) Figure 4 5 AN19, Page 38/LT1070 DS 2A Converter with 150μ A Quiescent Current (4.5V-8V to 12V) Figure 5 6 AN29, Page 9 200mA Output Converter (1.5V to 5V) Figure 6 7 AN29, Page 15 Up Converter (6V to 15V) Figure 7 7 AN8, Page 9/LT1013 DS Regulated Up Converter (5V to 10V) Figure 8 8 LT1018 DS Boost Converter (1.5V to 5V) Figure 9 8 AN15, Page 7/LT1018 DS Up Converter (1.5V to 5V) Figure 10 8 LM10 DS DRAWING INDEX
Transcript of AN30 - Switching Regulator Circuit Collection
Application Note 30
AN30-1
an30fa
February 1989
Switching regulators are of universal interest. LinearTechnology has made a major effort to address this topic.A catalog of circuits has been compiled so that a designengineer can swiftly determine which converter type isbest. This catalog serves as a visual index to be browsedthrough for a specific or general interest.
Switching Regulator Circuit Collection
John Seago
The catalog is organized so that converter topologies canbe easily found. There are 12 basic circuit categories:Battery, Boost, Buck, Buck-Boost, Flyback, Forward, HighVoltage, Multioutput, Off Line, Preregulator, SwitchedCapacitor and Telecom. Additional circuit information canbe located in the references listed in the index. Thereference works as follows, i.e., AN8, Page 2 = ApplicationNote 8, Page 2; LTC1044 DS = LTC1044 data sheet;DN17 = Design Note 17.
FIGURE TITLE FIGURE # PAGE REFERENCE/SOURCE
Battery2A Converter with 150µA Quiescent Current (6V to 12V) Figure 5 6 AN29, Page 9200mA Output Converter (1.5V to 5V) Figure 6 7 AN29, Page 15Up Converter (6V to 15V) Figure 7 7 AN8, Page 9/LT1013 DSRegulated Up Converter (5V to 10V) Figure 8 8 LT1018 DSBoost Converter (1.5V to 5V) Figure 9 8 AN15, Page 7/LT1018 DSUp Converter (1.5V to 5V) Figure 10 8 LM10 DSSingle Cell Up Converter (1.5V to 5V) Figure 11 8 AN8, Page 8The Low Quiescent Current Loop Applied to a Buck Converter (8V-16V to 5V) Figure 18 14 AN29, Page 12Low Power Switching Regulator (9V to 5V) Figure 23 17 AN8, Page 4/LT1013 DSMicropower Switching Regulator (5.8V-10V to 5V) Figure 24 17 AN23, Page 15Transformer Coupled Low Quiescent Current Converter (12V to 5V, ±12V) Figure 30 20 AN29, Page 13800µA Output Converter (1.5V to 5V) Figure 40 26 AN29, Page 14Switching Preregulated Linear Regulator (9V to 5V) Figure 49 31 AN8, Page 5/LT1013 DSMicropower Post Regulated Switching Regulator (6V-10V to 5V) Figure 51 32 AN23, Page 16Generating CMOS Logic Supply from 2 Mercury Batteries (2.4V to 4.8V) Figure 71 38 LTC1044 DSBattery Splitter (9V to ±4.5V) Figure 72 38 AN8, Page 2/LTC1044 DSRegulated Voltage Up Converter Figure 76 39 AN8, Page 7/LTC1044 DS
BoostBoost Converter (5V to 12V) Figure 1 5 AN19, Page 13/AN25, Page 2/LT1070 DSVoltage Boosted Boost Converter (15V to 100V) Figure 2 5 AN19, Page 37/LT1070 DSCurrent Boosted Boost Converter (16V-24V to 28V) Figure 3 5 AN19, Page 40/LT1070 DSNegative Boost Regulator (–15V to –28V) Figure 4 5 AN19, Page 38/LT1070 DS2A Converter with 150µA Quiescent Current (4.5V-8V to 12V) Figure 5 6 AN29, Page 9200mA Output Converter (1.5V to 5V) Figure 6 7 AN29, Page 15Up Converter (6V to 15V) Figure 7 7 AN8, Page 9/LT1013 DSRegulated Up Converter (5V to 10V) Figure 8 8 LT1018 DSBoost Converter (1.5V to 5V) Figure 9 8 AN15, Page 7/LT1018 DSUp Converter (1.5V to 5V) Figure 10 8 LM10 DS
DRAWING INDEX
Application Note 30
AN30-2
an30fa
FIGURE TITLE FIGURE # PAGE REFERENCE/SOURCE
Boost (Continued)Single Cell Up Converter (1.5V to 5V) Figure 11 8 AN8, Page 8Single Inductor, Dual Polarity Regulator (6V to ±15V) Figure 12 9 AN8, Page 10/LT1013 DSSingle Inductor Regulated Converter (5V to ±15V) Figure 13 10 AN29, Page 6Low Noise Converter (5V to ±15V) Figure 14 11 AN29, Page 2Ultralow Noise Sine Wave Drive Converter (5V to ±15V) Figure 15 12 AN29, Page 4Single Inductor, Dual Output Converter (5V to ±15V) Figure 16 13Basic Flash EPROM VPP Pulse Generator (5V to 12.75V or 12V) Figure 87 43 DN17High Repetition Rate VPP Pulse Generator (5V to 12.75V or 12V) Figure 88 43 DN17
BuckPositive Buck Converter (15V-35V to 5V) Figure 17 13 AN29, Page 23The Low Quiescent Current Loop Applied to a Buck Converter (8V-16V to 5V) Figure 18 14 AN29, Page 12Positive Buck Converter (7V-15V to 5V) Figure 19 15Positive Buck Converter Figure 20 15 AN19, Page 23Negative Buck Converter (–20V to –5.25V) Figure 21 16 AN19, Page 17/LT1070 DS90% Efficiency Positive Buck Converter with Synchronous Switch (9.5V-14V to 5V) Figure 22 16 AN29, Page 18Low Power Switching Regulator (9V to 5V) Figure 23 17 AN8, Page 4/LT1013 DSMicropower Switching Regulator (5.8V-10V to 5V) Figure 24 17 AN23, Page 155V, 1A Regulator (8V-30V to 5V) Figure 25 18 LT3524 DSHigh Power Linear Regulator with Switching Preregulator Figure 46 30 AN29, Page 25/LT1083 DSLinear Regulator with Switching Preregulator Figure 48 31 AN2, Page 3Switching Preregulated Linear Regulator (9V to 5V) Figure 49 31 AN8, Page 5/LT1013 DSLow Dissipation Regulator (10V-20V to 5V) Figure 50 32 LT1035 DSMicropower Post Regulated Switching Regulator (6V-10V to 5V) Figure 51 32 AN23, Page 16High Current Low Dissipation Preregulated Linear Regulator Figure 52 33 AN2, Page 4/LT1038 DSSwitching Preregulator for Wide Input Voltage Range (7.5V-30V to 5V) Figure 53 33 LT1020 DSHigh Current Positive Buck with Bootstrapped NMOS Gate Drive (15V-35V to 5V) Figure 89 44
Buck-BoostPositive Buck-Boost Converter (15V-35V to 28V) Figure 26 18 AN29, Page 24Nonisolated Regulator (–48V to 5V) Figure 27 19 AN19, Page 20/AN25, Page 4/AN29, Page 21Positive-to-Negative Buck-Boost Converter (10V-30V to –12V) Figure 28 19 AN19, Page 39/LT1070 DS
FlybackFlyback Converter (20V-30V to 5V) Figure 29 20 AN19, Page 26/AN29, Page 20/LT1070 DSTransformer Coupled Low Quiescent Current Converter (12V to 5V, ±12V) Figure 30 20 AN29, Page 13Totally Isolated Converter (5V to ±15V) Figure 31 21 AN19, Page 30/LT1070 DSInput Positive Output Negative Flyback Converter (3.5V-35V to –5V) Figure 32 21 AN29, Page 22High Efficiency Flux Sensed Isolated Converter (12V to 5V) Figure 33 22 AN29, Page 19Positive Current Boosted Buck Converter (28V to 5V) Figure 34 22 AN19, Page 34/LT1070 DSNegative Current Boosted Buck Converter Figure 35 23 AN19, Page 36/LT1070 DSNegative Input-Negative Output Flyback Converter Figure 36 23 AN19, Page 36/LT1070 DSPositive Input-Negative Output Flyback Converter Figure 37 24 AN19, Page 37/LT1070 DSFully Isolated Regulator (–48V to 5V) Figure 38 24 AN25, Page 6Low IQ, Isolated Converter (5V to ±15V) Figure 39 25 AN29, Page 7800µA Output Converter (1.5V to 5V) Figure 40 26 AN29, Page 14Multioutput Flyback Converter (12V to 5V, ±12V) Figure 85 42 DN18Multioutput, Transformer Coupled Low Quiescent Current Converter (12V to 5V, ±12V) Figure 86 42 DN18
DRAWING INDEX
Application Note 30
AN30-3
an30fa
FIGURE TITLE FIGURE # PAGE REFERENCE/SOURCE
ForwardForward Converter (20V-30V to 5V) Figure 41 27 AN19, Page 41/LT1070 DS
High VoltageNonisolated Converter (15V to 1000V) Figure 42 27 AN29, Page 26Isolated Output Converter (15V to 1000V) Figure 43 28 AN29, Page 27Converter with 20,000V Isolation (15V to 10V) Figure 44 28 AN29, Page 28
MultioutputSingle Inductor, Dual Polarity Regulator (6V to ±15V) Figure 12 9 AN8, Page 10/LT1013 DSSingle Inductor Regulated Converter (5V to ±15V) Figure 13 10 AN29, Page 6Low Noise Converter (5V to ±15V) Figure 14 11 AN29, Page 2Ultralow Noise Sine Wave Drive Converter (5V to ±15V) Figure 15 12 AN29, Page 4Single Inductor, Dual Output Converter (5V to ±15V) Figure 16 13Transformer Coupled Low Quiescent Current Converter (12V to 5V, ±12V) Figure 30 20 AN29, Page 13Totally Isolated Converter (5V to ±15V) Figure 31 21 AN19, Page 30/LT1070 DSLow IQ, Isolated Converter (5V to ±15V) Figure 39 25 AN29, Page 7Dual Preregulated Supply (90V AC-130V AC to ±12V) Figure 47 30 LT1086 DSDual Output Voltage Doubler Figure 60 35 LT1054 DSSwitched Capacitor Converter (5V to ±12V) Figure 61 35 AN29, Page 30/LT1054 DSSwitched Capacitor Charge Pump-Based Voltage Multiplier (5V to ±12V) Figure 62 36 AN29, Page 31Dual Output Switched Capacitor Voltage Generator Figure 78 39 LT1026 DSSwitched Capacitor-Based Converter (6V to ±7V) Figure 79 40 AN29, Page 31Voltage Multiplier (±5V to ±15V) Figure 81 41 LT1032 DSHigh Current Switched Capacitor Converter (6V to ±5V) Figure 84 41 AN29, Page 29Multioutput Flyback Converter (12V to 5V, ±12V) Figure 85 42 DN18Multioutput, Transformer Coupled Low Quiescent Current Converter (12V to 5V, ±12V) Figure 86 42 DN18
Off Line100W Off-Line Switching Regulator. DANGER! Lethal Potentials Present Figure 45 29 AN25, Page 8
PreregulatorHigh Power Linear Regulator with Switching Preregulator Figure 46 30 AN29, Page 25/LT1083 DSDual Preregulated Supply (90V AC-130V AC to ±12V) Figure 47 30 LT1086 DSLinear Regulator with Switching Preregulator Figure 48 31 AN2, Page 3Switching Preregulated Linear Regulator (9V to 5V) Figure 49 31 AN8, Page 5/LT1013 DSLow Dissipation Regulator (10V-20V to 5V) Figure 50 32 LT1035 DSMicropower Post Regulated Switching Regulator (6V-10V to 5V) Figure 51 32 AN23, Page 16High Current Low Dissipation Preregulated Linear Regulator Figure 52 33 AN2, Page 4/LT1038 DSSwitching Preregulator for Wide Input Voltage Range (7.5V-30V to 5V) Figure 53 33 LT1020 DS
Switched CapacitorBasic Voltage Inverter Figure 54 34 LT1054 DSBasic Voltage Inverter/Regulator Figure 55 34 LT1054 DSNegative Voltage Doubler Figure 56 34 LT1054 DSPositive Doubler Figure 57 34 AN29, Page 30/LT1054 DSSwitched Capacitor – VIN to VOUT Converter Figure 58 34 AN29, Page 29100mA Regulating Negative Doubler Figure 59 35 LT1054 DSDual Output Voltage Doubler Figure 60 35 LT1054 DSSwitched Capacitor Converter (5V to ±12V) Figure 61 35 AN29, Page 30/LT1054 DS
DRAWING INDEX
Application Note 30
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FIGURE TITLE FIGURE # PAGE REFERENCE/SOURCE
Switched Capacitor (Continued)Switched Capacitor Charge Pump-Based Voltage Multiplier (5V to ±12V) Figure 62 36 AN29, Page 31Regulator (3.5V to 5V) Figure 63 36 LT1054 DSRegulating 200mA Converter (12V to –5V) Figure 64 36 LT1054 DSDigitally Programmable Negative Supply Figure 65 37 LT1054 DSPositive Doubler with Regulation Figure 66 37 LT1054 DSNegative Doubler with Regulator Figure 67 37 LT1054 DSNegative Voltage Converter Figure 68 37 LTC1044 DSVoltage Doubler Figure 69 37 LTC1044 DSVoltage Doubler Figure 70 38 AN8, Page 6Generating CMOS Logic Supply from 2 Mercury Batteries (2.4V to 4.8V) Figure 71 38 LTC1044 DSBattery Splitter (9V to ±4.5V) Figure 72 38 AN8, Page 2/LTC1044 DSParalleling for Lower Output Resistance Figure 73 38 LTC1044 DSStacking for Higher Voltage Figure 74 38 LTC1044 DSVoltage Tripler/Quadrupler Figure 75 39 LTC1044 DSRegulated Voltage Up Converter (3V to 5V) Figure 76 39 AN8, Page 7/LTC1044 DSRegulated Negative Voltage Converter Figure 77 39 AN8, Page 2/LTC1044 DSDual Output Switched Capacitor Voltage Generator Figure 78 39 LT1026 DSSwitched Capacitor-Based Converter (6V to ±7V) Figure 79 40 AN29, Page 31High Power Switched Capacitor Converter (12V to 5V) Figure 80 40 AN3, Page 16/AN8, Page 5/AN29, Page 32Voltage Multiplier (±5V to ±15V) Figure 81 41 LT1032 DSCharge Pump Negative Voltage Generator Figure 82 41 LT1020 DSCharge Pump Voltage Doubler Figure 83 41 LT1020 DSHigh Current Switched Capacitor Converter (6V to ±5V) Figure 84 41 AN29, Page 29
TelecomNonisolated Regulator (–48V to 5V) Figure 27 19 AN19, Page 20/AN25, Page 4/AN29, Page 21Fully Isolated Regulator (–48V to 5V) Figure 38 24 AN25, Page 6
DRAWING INDEX
SUGGESTED READING
Pulse Engineering Catalog—Switching MagneticsPulse Engineering, Inc.P.O. Box 12235San Diego, CA 92112(619) 268-2400
Pressman, A.I., “Switching and Linear Power Supplies,Power Converter Design,” Hayden Book Co., HasbrouckHeights, New Jersey, 1977, ISBN 0-8104-5847-0.
Chryssis, G., “High Frequency Switching Power Supplies,Theory and Design,” McGraw Hill, New York, 1984, ISBN0-07-010949-4
Nelson, C., “LT1070 Design Manual,” Linear TechnologyCorporation, Application Note 19.
Williams, J., “Switching Regulators for Poets,” LinearTechnology Corporation, Application Note 25.
Williams, J., “Power Conditioning Techniques for Batter-ies,” Linear Technology Corporation, Application Note 8.
Williams, J. and Huffman, B., “Some Thoughts on DC-DCConverters,” Linear Technology Corporation, ApplicationNote 29.
Williams, J., “Inductor Selection for LT1070 SwitchingRegulators,” Linear Technology Corporation, DesignNote 8.
Application Note 30
AN30-5
an30fa
+ R110.7k1%
R21.24k1%
AN30 F01
12V1A
R31k
C11µF
C21000µF
+C3*
100µF
L1**150µH
D1
5V
VSW
VC
VIN
LT1070
GND FB
C3100µF
L210µH
OUTPUTFILTER
***
REQUIRED IF INPUT LEADS ≥ 2"PULSE ENGINEERING 92113
+
R4680Ω
1W
AN30 F02
1L1N = 5
TOTAL INDUCTANCE = 4mHINTERLEAVE PRIMARY AND SECONDARY FOR LOW LEAKAGEINDUCTANCE
R310k
R21.24k
R198k
C20.047µF
C30.68µF
C1200µF
VOUT100V300mA
D2
D1
VSW
VC
VIN
LT1070
GND
VIN15V
FB
+
Figure 1. Boost Converter (5V to 12V) Figure 2. Voltage Boosted Boost Converter (15V to 100V)
+
R4
AN30 F03
R3 R21.24k
R127k
C2
C3 I
N
C1
VOUT28V4A
D2
D1
VSW
VC
VIN
LT1070
GND
VIN16V TO 24V
FB
+
R127k
RO(MINIMUMLOAD)
R21.24k
AN30 F04
R33.3k
C20.22µF
C310µF
++
C11000µF
+C4*
470µF
VIN–15V
VOUT–28V1A
L1200µH
D2
D1
VSW
VC
VIN
LT1070
GND FB
*REQUIRED IF INPUT LEADS ≥ 2"
Figure 3. Current Boosted Boost Converter (16V-24V to 28V)
Figure 4. Negative Boost Regulator (–15V to –28V)
Application Note 30
AN30-6
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+
–
+
A11/2 LT1017
10pF(OPTIONAL)
*1% METAL FILM RESISTORL1 = PULSE ENGINEERING, INC. #PE-51515
= 1N4148
= 74C04
6V
R32M
R410k
LT10041.2V
6V
AN30 F05
R5180k
R6200Ω
VC
VSW
47µF L150µH
6VIN (4.5V TO 8V)
LT1070
GND
FB
–
+
1.2M*
“LOW BATT”
3.6M*
MUR405
R1*1M
R2*120k
A21/2 LT1017
+C12700µF
R7100k
12VOUT
C31500pF
+C247µF
Figure 5. 2A Converter with 150µA Quiescent Current (4.5V-8V to 12V)
Application Note 30
AN30-7
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–
+
–
+
C1A1/2 LT1018
C1B1/2 LT1018
200k68k
0.01µF
1.5VIN
10k 100Ω
576Ω*
100k
47k10k
1k
47k
AN30 F06
1.5VIN
2Ω
Q22N3507 3.74k*
665Ω*
*1% METAL FILM RESISTORSL1 = PULSE ENGINEERING, INC. #PE-92100
5VOUT
Q12N2907
1.5VIN
1.5VIN
1N4148
1.5V
HP5082-281039k
1k
6.8µF
VC
VSWVIN
1.5VIN
220µFL125µH
22µF
LT1070
GND
FB
+
+
+
1N5823
500µF+
1k
75kTO
C1B “+”INPUT
LT10041.2V
OPTIONAL IFVSUPPY CAN EXCEED 1.7V
100k
+V
–
+–
+LT1013
5 8
4
6
7
LT1013
3
2
1
0.1µF
200k
LT10041.2V
130k
300Ω
OUTPUT15V
50mAINPUT
6V
100µF
1N5821
2N5262
L11MHY
2.2µF
5.6k
AN30 F07
5.6k
220pF
220k1M
22k2N2222
0.001µF
L1 = AIE–VERNITRON 24–10478% EFFICIENCY
+
+
Figure 6. 200mA Output Converter (1.5V to 5V)
Figure 7. Up Converter (6V to 15V)
Application Note 30
AN30-8
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+
–
+1/2 LT1018
8
0.1µF200k
LT10041.2V
2
3
11N4148
2000pF100µF
R1**910k
OUTPUT10V2mA
1N4148400mH*
100k
5V
4
–
+1/2 LT1018
*DALE TE-5/Q3/400mH
**VOUT = 1.2 1 + R1R2
7
5
6
R2**120k
AN30 F08( )
+
–
+C1A
1/2 LT1018
–
+C1B
1/2 LT1018
1M
2M
100k
1.5V
1N4148
1N914
120k* 56.2k*100k*
*1% FILM RESISTORL1 = RL1123-47-RENCO, INC
110k
LT10341.2V
0.0022µF
220pF
1M 365k*
120k
AN30 F09
HP5082-2810
22µF
+47µF
EOUT5V
L14.7mH
Figure 8. Regulated Up Converter (5V to 10V) Figure 9. Boost Converter (1.5V to 5V)
+–
7
Q2
D1T1
5V OUTTO CMOSSYSTEM
D2
47µF
15k
15k
Q1
2
REF
LM10
36
8 REF200mV
AN30 F10
D1, D2 = 1N933 (GERMANIUM)Q1, Q2 = 2N2222AR = OUTPUT ADJUSTT1 = STANCOR PCT-39THIS 1.5V BATTERY TO 5V OUTPUT DESIGNCAN DRIVE LOW POWER CIRCUITRY FOR MONTHS
R250k 0.1µF
5.1M
1
4
1.5V (BAT)
+–
+
+
–
+
–
+
200mVREF
REF AMP
OP AMP
LM10
0.004µF
0.1µF
2k
10M
5VOUTPUT
330k
AN30 F11
200kOUTPUTADJUST
T1 = TRIAD SP-29Q1 TO Q3 = 2N1194
Q3
Q2Q1
1.5V
470Ω4 T1
5
6
1
247µF
1N100A
1N100A3
15k15k10k
300pF
EVEREADY850
Figure 10. Up Converter (1.5V to 5V) Figure 11. Single Cell Up Converter (1.5V to 5V)
Application Note 30
AN30-9
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–
+
LT1013
6
5
7
–
+
LT1013
28
4
3
1
1M
AN30 F12
1.4M
82k
0.005µF
2N5114
2N4391
LT10041.2V
100k
6V
16V
–16V
0.005µF10µF
15VOUT
–15VOUT
200kVOUTADJ
15pF
15pF
1µF
10µF
16V
–16V
L11mH
2N3904
2N3906
1N914
1N914
10k
10k
10k
22k
22k
10k
+V Q1 CLK 2
D1 Q1 Q2D2
CLK 1 Q274C74
+
100kHzINPUT
L1 = 24-104 AIE VERNITRON
±5mA OUTPUT75% EFFICIENCY
6V
74C00
6V
= 1N4148
+
+
Figure 12. Single Inductor, Dual Polarity Regulator (6V to ±15V)
Application Note 30
AN30-10
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–
+C1A
1/2 LT1018HP5082-2810
1000pF
5
12
300Ω
10k
10k
10k
32k
12.4k*
150k*
4.7k
4.7k
10k
5V
300Ω
*1% METAL FILM RESISTORL1 = PULSE ENGINEERING, INC. #PE-92105
= 1N4148
= 74C14
2k 137k*
12.4k*
AN30 F13
100Ω
1k5V
100Ω
5V
5V
2k
Q12N3906
Q22N3904
L1145µH
Q22N3507
φ2
φ1
5V
Q32N5023
100µF
–15VOUT
15VOUT
+
100µF+
74C90÷ 10
–
+C1B
1/2 LT1018
LT10041.2V
Figure 13. Single Inductor Regulated Converter (5V to ±15V)
Application Note 30
AN30-11
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+
10k
10OΩ
10OΩ
10OΩ
10OΩ
LEVE
L SH
IFTS
10k
CLK
NONO
VERL
APGE
NERA
TOR22k
+VQ
POIN
T “A
”BO
OST
OUTP
UT≈1
7V D
C
74C7
474
C74
CKD
Q
74C1
4
0.00
1µF
0.00
1µF
0.00
3µF
DRIV
ERS
EDGE
SHAP
ING
0.00
3µF
–4V
DC
Q3
Q4
1k
1k15
0k150k
74C0
2
74C0
2
74C1
474
C14
74C1
4
15kH
z, 5
µsNO
NOVE
RLAP
10k
φ1Q1
10k
= +5
GRO
UND
= ±1
5 CO
MM
ON
= FE
RRIT
E BE
AD, F
ERRO
NICS
#21
-110
J
*1%
FIL
M R
ESIS
TOR
FET
= M
OTOR
OLA
MTP
3055
ENP
N =
2N39
04PN
P =
2N39
06L1
= P
ULSE
ENG
INEE
RING
, INC
# P
E-61
592
φ2Q2
100µ
F
BOOS
T
+10
µF
0.00
1µF
3
LT10
54
1N58
17
1N58
17
D2 1N58
17
5VIN
(4.5
V TO
5.5
V)
D31N
5817
TURB
OBO
OST
5
2 8
+47
µF
S 1
4 6 7 8 9L1
5V2 3
Q5D S
Q6
D5V
D1 1N58
17
+22µF
0.00
1µF
470Ω
MUR
120
(ALL
)
+100µ
F
+10
0µF
+10
µF
+10
µF
LT10
86
249Ω
*
15V
OUT
2.74
k*
OUT
COM
MON
+1µF
+10µF
LT33
7A
249Ω
*
–15V
OUT
2.74
k*
AN30
F14
Figu
re 1
4. L
ow N
oise
Con
verte
r (5V
to ±
15V)
Application Note 30
AN30-12
an30fa
Figu
re 1
5. U
ltral
ow N
oise
Sin
e W
ave
Driv
e Co
nver
ter (
5V to
±15
V)
–+A3
LT10
06
–+A1
LT10
06
–+
A41/
2 LT
1013
– +
1/2
LT10
13I Q CO
NTRO
LLO
OP
Q2 2N22
1950
Ω
68Ω
0.1µ
F
50Ω
220Ω
820Ω
2k8
5V
100Ω
10k
10k
20k
620Ω
0.1Ω
Q61N
4001
430Ω 1k
750Ω
*
5V1k
LT10
092.
5V1k*
1N40
01
POW
ER A
MP
430Ω
Q3 2N29
05
Q4 MJE
2955
Q5 MJE
3055
0.1µ
F8
L3
1
5 3
4
4
330µ
F†
0.22
µF
0.33
µF
+
+
330Ω
5k
4.99
k*
8
1µF
10k*
*
*
*
*0.
005µ
F
220µ
F–1
9VUN
REG
1N52
60B
47µF
–15V
OUT
L2 25µH
0.1µ
F
AN30
F15
220µ
F
47µF
OUT
COM
MON
0.1µ
F
19V
UNRE
G
– +
A61/
2 LT
1013
A8LT
1010
– +
A61/
2 LT
1013
L1 25µH
+
+
+
330Ω
10k*
15V O
UT
10k*
A7LT
1010
INOUT LT
1021
10V
22µF
5VIN
(4.5
V TO
5.5
V)
+
1µF
10k
200k
3.1k
THER
MAL
LYM
ATED
680Ω
Q1
2k
10k
1k
1k
1k
+
0.22
µF
0.22
µF
A2OS
CILL
ATOR
STAB
. LOO
P
*1%
MET
AL F
ILM
RES
ISTO
R† TH
F337
K006
P1G
L1, L
2 =
PULS
E EN
GINE
ERIN
G, IN
C #P
E-92
100
L3 =
PUL
SE E
NGIN
EERI
NG, I
NC #
PE-6
5064
UNM
ARKE
D NP
N =
2N39
04
220Ω
47µF
270Ω
(SEL
ECTE
DVA
LUE)
0.01
µF
16kH
zOS
CILL
ATOR
8
0.01
µF
+
= 1N
4148
= 1N
4934
= +5
GRO
UND
= ±1
5 GR
OUND
*
Application Note 30
AN30-13
an30fa
+VIN VSW
MUR120** 1N4001 1N4001 1N4001
470µF
E1LT1072CN8
L1470µH
FBE2100µF
5V
1k
4.32k* 5.1k
12V75mA
499Ω*
1µF
2µF
0.05µF
–12V75mA
AN30 F16
*1% FILM RESISTORS**MOTOROLA, MUR120L1 = PULSE ENGINEERING, INC #PE-52648
5
6
7
8
1
2
3
4
VCGND
+
LT1054 20k* 215k*
2N22222k
+
+
10µF
100µF
+100µF
VIN VSWE1100µF
51Ω2W
D11N4148
Q22N2222A
Q1IRF9Z30
(HEAT SINK)L1
170µH5VOUT5A
12VD21N759(OPT)
D2MBR735(MOTOROLA)
1000µF
LT1072CN8
FBE2
2N2222
VCGND
1N4148
+
3.01k*
1k*
AN30 F17
1k
2N6667(HEAD SINK)
1k
1µF
*1% FILM RESISTORSL1 = PULSE ENGINEERING, INC #PE-92113
5.1k
1k
1k1k
0.1Ω
100µF
VIN12V TO 35V
2N3906
+
100Ω1W
1N4148
OPTIONAL
2N2222
Figure 16. Single Inductor, Dual Output Converter (5V to ±15V)
Figure 17. Positive Buck Converter (15V-35V to 5V)
Application Note 30
AN30-14
an30fa
VIN VSW
LT1072
FB NCVC
2k
GND
+
200Ω 10k
10pF
12VIN
10k
LT10041.2V
AN30 F18
12VIN470k
1k100Ω
0.4Ω12VIN8V TO 16V
Q22N3906
Q42N3904
Q32N3904
MUR405 2700µF 1M 1M*
100k
5VOUT
1500pF
340k*
L1100µH
Q1IRF-9531
+47µF
*1% FILM RESISTORL1 = PULSE ENGINEERING, INC #PE-92108
= 74C04
1N4148
–
+
1/2 LT1017
1N4148
1N4148
+10µF
Figure 18. The Low Quiescent Current Loop Applied to a Buck Converter (8V-16V to 5V)
Application Note 30
AN30-15
an30fa
VIN VSWE1
LT1072CN8
FBE2VC
1N4148
2N2222
*1% FILM RESISTORSL1 = PULSE ENGINEERING, INC. #PE-52648
1k
1µFAN30 F19
GND
220Ω
470µF
1N5819(MOTOROLA)
100Ω
2N2905
3.01k*
L1470µH
5VOUT250mA
1k*
100pF5.1k
1k
1k
1Ω
2N3906
VIN7V TO 15V
10µF+
+
VSW
VC
VIN
LT1070
GND
FB
R3470Ω
D1MBR745
***
REQUIRED IF INPUT LEADS ≥2"PULSE ENGINEERING 92112
C11µF r
+R21.24k
R13.74k
D21N914
C21µF
+C32.2µF
VIN
C5*100µF
D31N4001
+ C41000µF
L1**100µF
R410Ω
5V4.5A
AN30 F20
100mAMINIMUM
C5200µF
L24µH
OPTIONALOUTPUTFILTER
+
Figure 19. Positive Buck Converter (7V-15V to 5V)
Figure 20. Positive Buck Converter
Application Note 30
AN30-16
an30fa
AN30 F21
R3 R21.24k
***
REQUIRED IF INPUT LEADS ≥ 2"PULSE ENGINEERING 92113
Q12N3906
R14.64k
C1
C21000µF
C3100µF
VIN–20V
–5.2V4.5A
D1 L1**200µH
VSW
VC
VIN
LT1070
GND
OPTIONAL INPUTFILTER FB
LOAD
C4200µF
L24µH
OPTIONALOUTPUTFILTER
+
+
+
L3
Figure 21. Negative Buck Converter (–20V to – 5.2V)
VINVSWE1
LT1072CN8
FB
5k
1N4148
Q52N2222
D11N4148
E2VCGND
100Ω
+1N4148
D31N4148
5kQ32N2222
Q1P50N05E
Q4VN2222LL
D21N4148
Q2P50N05E
VOUT5V5A
C10.1µF
L1100µH
3.01k*
1000µF
AN30 F22
1k*
50Ω
220Ω1k
9kLT1004-2.5
= P50N05E (MOTOROLA) IRFZ44 (INTERNATIONAL RECTIFIER)
3.5k
220Ω
1µF
Q92N2222
Q62N2222
*1% FILM RESISTORS**VBE MATCHING OF 20mV AT 200µAL1 = PULSE ENGINEERING, INC. #PE-92210K
0.018Ω
Q7**2N3906
R1619Ω
50k
100Ω
1k
47pF
Q8**2N3906
12VIN9.5V TO
14.5V
+220µF
Figure 22. 90% Efficiency Positive Buck Converter with Synchronous Switch (9.5V-14V to 5V)
Application Note 30
AN30-17
an30fa
+
–
+A2
LT1013
1N41480.01Ω
10k
1M
1.2k
100k
220k
50kOUTPUTADJUST
LT10341.2V
L1 = DALE TE-3/Q3/TA
9V
AN30 F23
Q12N2907A
L110mHy
9V
10k 390k
47µF
5VOUT
1N4148
1µFEVEREADYE-92-6 CELLS
100pF
9V
–
+A1
LT1013
–
+C2
1/2 LT1017
0.2Ω
+
–
+V
1N914
74C907(SEE DETAIL)
1N5817 47µF
5VOUT
100mHDALE TE-5Q4-TA
+V INPUTV = 5.8V – 10V
5pF
+
–
+
C1 1/2 LT1017
100k*
47k
AN30 F24
LT10041.2V
+V
330k
12k
*1% METAL FILM RESISTOR
1M
390k*
50kOUTPUTADJUST
HP50822810
VCC
OUTPUT
74C907 DETAIL
INPUT
Figure 23. Low Power Switching Regulator (9V to 5V)
Figure 24. Micropower Switching Regulator (5.8V-10V to 5V)
Application Note 30
AN30-18
an30fa
0.01µF
0.01µF
5k5k
5k
6.5k
0.15ΩAN30 F25
30k
VREF C1
NI E1
INV C2
RT E2
CT CL+
COMP
L1 = PULSE ENGINEERING #PE-92107
CL–
16
1
2
6
7
9
12510Ω
0.1µF 500µF
D1MR850
Q22N3906
Q12N6191
L1450µH
600Ω
600Ω
5k
5V1A
15
11
13
14
4
5
8
LT3524
GND
VIN
+10µF 0.1µF
+
VIN ≥ 8V
VIN VSWE1
D11N4148
*1% FILM RESISTORSL1 = PULSE ENGINEERING, INC #PE-52627
220Ω1W
28V NOMINAL15V TO 35V
Q22N2222A
7.5V1N755
D3MBR360(MOTOROLA)
D2MBR360
1000µF
Q1ERF9Z30
L1330µH
D4MBR360
28V250mA
1N4148
LT1072CN8
FBE2VCGND
+1k
26.1k*
1.21k*
AN30 F26
1k
1µF
100µF+
Figure 25. 5V, 1A Regulator (8V-30V to 5V)
Figure 26. Positive Buck-Boost Converter (15V-35V to 28V)
Application Note 30
AN30-19
an30fa
++
LT1070HV
VC FBG
2k1.2k1%
AN30 F27
3.9k1%
3.01k1%
3.01k1%
1k1%
5V OUTPUT4A
FROM5V OUTPUT
OPTIONAL LOW DRIFTFEEDBACK CONNECTION
100µHPULSE ENGINEERING#51516
Q22N5401
1100µF†
+100µF
0.22µF
VSW
*
VINQ2
2N5401
TOFB PIN
Q32N5401
TO–48V
220Ω1k
–48V
2.2µF
3k1/2W
–48V0V TO 60V
INPUT MUR810 (MOTOROLA)1.5KE68A (MOTOROLA)VPR1127R5E1E (MALLORY)
***
†
68V**
1N593630V
Q12N5550
Figure 27. Nonisolated Regulator (–48V to 5V)
+R6470Ω
AN30 F28
VIN10V TO 30V
***
REQUIRED IF INPUT LEADS ≥ 2"PULSE ENGINEERING 92113
†TO AVOID START-UP PROBLEMS FOR INPUT VOLTAGES BELOW 10V, CONNECT ANODE OF D3 TO VIN AND REMOVE R5. C1 MAY BE REDUCED FOR LOWER OUTPUT CURRENTS.C1 ≈ (500µF)(IOUT) FOR 5V OUTPUTS, REDUCE R3 TO 1.5k, INCREASE C2 TO 0.3µFAND REDUCE R6 TO 100Ω.
VOUT–12V2A
R35k
R21.24k
C10.1µF
C5*100µF
C32µF
+C4
5µF
+C1†
1000µF
L1**200µH
VSW
VC
VIN
LT1070
R5†
470Ω1W
D3†
1N4001
R110.7k
R447Ω
D21N914
D1
GND FB
Figure 28. Positive to Negative Buck-Boost Converter (10V-30V to –12V)
Application Note 30
AN30-20
an30fa
AN30 F29*REQUIRED IF INPUT LEADS ≥ 2"
a
b
VSNUB
C20.15µF
R31.5k
R13.74k
R21.24k
C4*100µF
VIN20V TO 30V
VOUT5V6A
VSW
VC
VIN
LT1070
GNDFB
C30.47µF
C12000µF
D2
D1
R41 N
•
•
+
+
PRIMARY FLYBACK VOLTAGE =
LT1070/LT1071 SWITCH VOLTAGEAREA “a” = AREA “b” TO MAINTAINZERO DC VOLTS ACROSS PRIMARY
SECONDARY VOLTAGEAREA “c” = AREA “d” TO MAINTAINZERO DC VOLTS ACROSS SECONDARY
PRIMARY CURRENT
VOUT + VFN
0V
VIN
CLAMP TURN-ONSPIKE
C4200µF
L210µH
OPTIONALFILTER
c
∆I
d
VOUT + VF
(N)(VIN)
IPRI
0V
0
LT1070 SWITCH CURRENT
SNUBBER DIODE CURRENT
IPRI
IPRI
t = (IPRI)(LL)
VSNUB
SECONDARY CURRENT
IPRI N
0
0
N = 1/3
Figure 29. Flyback Converter (20V-30V to 5V)
VSW
1
3
6
5C12700µF
VC
VINMUR120
MBR360
LT1071
GNDFB NC
+
–
+
2
4
12VIN
22µF
11
10
MUR120
•
•
•
•470µF
1.2k*
11k*
R31M
R1*1M
R2*453k
R410k
R5180k
LT10041.2V
12VIN
AN30 F30
R710k
C30.005µF
–12V
VOUT5V1A
+10µF
+LT1086
9
8
L17
MUR120
•470µF
1.2k*
11k*
+10µF
12V
+LT1086
R6200Ω
74C04(5)
12VIN
10pF
1N41481N4148
A11/2 LT1017
C247µF
*1% FILM RESISTORL1 = PULSE ENGINEERING, INC #PE-65108
+
0.2µF
2k2W
Figure 30. Transformer Coupled Low Quiescent Current Converter (12V to 5V, ±12V)
Application Note 30
AN30-21
an30fa
AN30 F31
R41.5k
5k
500Ω
N = 0.875 = 7:8FOR VOUT = 15V
*REQUIRED IF INPUT LEADS ≥ 2"
R2
SECONDARY VOLTAGE0V
VOUT
tOFF tON
≈16V
(N)(VIN)
C20.01µF
C5*100µF
VIN5V
VSW
VC
VIN
LT1070/LT1071
GNDFB
+
C30.47µF N
D11:N
•
•N
+
L110µF
L210µF
15V
COM
+
C4500µF
C1500µF
+
+
C6200µF
C5200µF
OPTIONALOUTPUT FILTER
+–15V
SWITCH VOLTAGE
VF(DIODE FORWARD VOLTAGE)
0V
VIN
VSW
5VVIN = 3.5V TO 35V
OPTIONAL
VC
VIN
LT1070
GNDFB
1k
1µF
*1% FILM RESISTORSL1 = PULSE ENGINEERING, INC #PE-65050 +
3.01k*
1k*
510Ω1W
L1n = 1Q3
2N3906Q22N3906
Q12N2222
3
4MBR360(MOTOROLA)
0.68µF 1k*1%
1k*
1k*1%
3.32k*1%
–5VOUT1A
1000µF
AN30 F32
D1MBR360
•
L1 n = 1
2
1
•
+
+
100µF
1000µF
5VOUT1A
3
VIN
VSW
FB
n = 1
4
L12
MBR360
1•
Figure 31. Totally Isolated Converter (5V to ±15V)
Figure 32. Input Positive Output Negative Flyback Converter (3.5V-35V to –5V)
Application Note 30
AN30-22
an30fa
VSW
12VIN
VC
VIN
LT1070
GNDFB
1k
1µF
*1% FILM RESISTORS**MOTOROLAL1 = PULSE ENGINEERING, INC #PE-65066
0.47µF 2k
1
3
5
4
L1 5VOUT100mA TO 1A
6MBR360
MBR1060**
680Ω
3.40k*
1.07k*
1k
AN30 F33
0.1µF
+100µF
8•
•
•
MBR1060**
+
+
1000µF
22µF
R3680Ω
C10.33µF
200pF
*REQUIRED IF INPUT LEADS ≥ 2"
R41.24k
C25000µF
VOUT5V10A
VIN28V
R15k
VSW•
•
VIN
C30.47µF
C60.002µFD2
470Ω2W
1:N
N ≈ 0.25LT1070
GND VCFB
AN30 F34
R6470Ω
–
+COMPLM308
VIN
R21k
R71.24k
R55k
V–
7
D1
2
3
8
4
6 V+
+
C5* 100µF
+
Figure 33. High Efficiency Flux Sensed Isolated Converter (12V to 5V)
Figure 34. Positive Current Boosted Buck Converter (28V to 5V)
Application Note 30
AN30-23
an30fa
AN30 F35
R3 R21.24k
Q12N3906
R412k
C2
C3
R1MINIMUMLOAD = 10mA –VOUT
5V10A
D1
T11:NR5
•
•
C1
VSW
VC
VIN
–VIN
LT1070
GND FB
+
+
VOUT – 0.6V1mA
R1 =
Figure 35. Negative Current Boosted Buck Converter
+
R5 R41.24k
C2
VSW Q12N3906
•
•VIN
C3
C1
–VOUT
AN30 F36
R6
R1*
T11:N
LT1070/LT1071
GND VCFB
–VIN
R31k
R25k
+
*R1 = VOUT – 1.6V200µA
Figure 36. Negative Input-Negative Output Flyback Converter
Application Note 30
AN30-24
an30fa
VSWVIN
VIN
LT1070
GND VCFB
L1 = PULSE ENGINEERING INC #PE-65050
R61k
R51k
C21µF
•1/2 T1 L1
R7470Ω2W
C40.47µF
D2MUR110
+
R11k • VOUT
R21.24k
R31.24k
–
+
C30.01µF LT1006
R4 = R1
–VOUT
C11/2 T1
AN30 F37
D1
VIN
•
+
+
VSW
LT1071 FB
4
1
2 6 100Ω1/2W
2k5W
10MUR860
5
NC
1N3026A18V MUR120
MUR120
GNDVC
VIN
Q5IRF830
D 50Ω
220k
47kNC
50Ω
MBR735
OPTIONAL
PULSEENGINEERING
#PE-64795
•
•
•
S
G
100Ω
4N28820Ω
2M
10k 20Ω
36k
0.1µF
0.47µF
1µF
7
4 LT10041.2V
AN30 F38
2k
12.1k*
39.2k*10k
3k47k
–48V RETURN
10k
22kVZ = 7V
47k47k
–48VIN–40V TO –60V INPUT
Q4
10µF
22µF
+100µF
+47µF
0.47µF
Q3
*1% METAL FILM RESISTOR**QLA202U7R5J1L (MALLORY)†1.5KE68A (MOTOROLA)“M” PREFIXED DIODES = MOTOROLAPNP = 2N3906NPN = 2N3904
Q2
68V†
Q1
0.47µF250V 2000µF**
–
+A1
LT1006
+
50µFSPRAGUETE1307
5V OUTPUT5A
4µHPULSE ENGINEERING
#52901
+
= 1N4148
Figure 37. Positive Input-Negative Output Flyback Converter
Figure 38. Fully Isolated Regulator (–48V to 5V)
Application Note 30
AN30-25
an30fa
4
500k
*
7
58
6
112
2.5M
*0.
001µ
F
0.00
1µF
0.00
2µF
Q2 VN22
22
15V O
UT10
0mA
–15V
OUT
100m
A
39
16V
PRER
EG
–16V
PRE
REG
2.5V
REF
OUT
COM
PNP
N
COM
PPN
P
–IN
OUT FB
+IN
GND
V IN
500k
*
10µF
100k
3M*
20M
+
10µF
+
470k
10k
TO R
EF O
UTOPTI
ONAL
TO 1
6V P
RERE
G
470k
3.2M
TO–1
6VUN
REG TO
–15V
1.5k
1.5M
5.6M
47k
AN30
F39
– +
C1A
1/2
LT10
17
– +C1
B1/
2 LT
1017
216k
*
1.2M
*
10k
82k
390k
*1%
FIL
M R
ESIS
TOR
L1 =
PUL
SE E
NGIN
EERI
NG, I
NC #
PE-6
1592
47µF
90.
47µF
MUR
120
8 7
11.
2k 2W
3
NC
Q12N
3906
1N41
48
L1
5VIN
4.5V
TO
5.5V
1N41
48
5V4N
46
+
47µF
+
V SW
GND
LT10
70FBV I
N
V C
10k
= +5
GRO
UND
= ±1
5 CO
MM
ON
Figu
re 3
9. L
ow I Q
, Iso
late
d Co
nver
ter (
5V to
±15
V)
Application Note 30
AN30-26
an30fa
NC 47µF
22pF
VIN
10M
1M*
1M*
HP-5082-2810
360k
LT10041.2V
0.001µF
0.001µF
4.3M*
10M 47k
150k
470k
*1% METAL FILM RESISTORL1 = TRIAD #SP-29PNP = 2N3906NPN = 2N3904
390k
10M
619k*
HP5082-2810 5VOUT
2
3
1
5
4NC L1
VIN1.1V TO 2V
6
1
3
5
4
6
–
+C2B
1/2 LT1017
–
+C1A
1/2 LT1017
1.5V
10M
240k1.5M
3.9M
2M3.9M
1.5V
–
+C2A
1/2 LT1017
–
+C1B
1/2 LT1017
–
+
C1B22pF1.5V
OPTIONALFOR NEGATIVE
OUTPUT
+
620k
5.1M 10k
HP5082-2810
1N4148
LT10041.2V
TO 390kOF C2B
VIN
AN30 F40
150pF
2.2µF
47µF
+
+
C2B
C2A
Figure 40. 800µA Output Converter (1.5V to 5V)
Application Note 30
AN30-27
an30fa
+
R3R6
330Ω R51Ω
Q1
C3C4
VSW
L170µH
•
••
VIN
C2
D3
C12000µF
D1 VOUT5V6A
R4
T1
LT1070
GND VCFB
VIN20V TO 30V
D4
I M N
D2
AN30 F41
R13.74k
R21.24k
VSWVIN
15VMUR120
SEMTECHFM-50
3
22µF 15V
L1
1
7
0.1µF2000V
VOUT1000V5W
*MAX-750-22 VICTOREEN, INCL1 = PULSE ENGINEERING, INC #PE-6197
10M*1%
8
1k1/2W0.47µF
LT1072
GND VC
FB12.4k, 1%(IDEAL VALUE—PAD ASREQUIRED FOR 1000VOUT)
+
2µFAN30 F42
Figure 41. Forward Converter (20V-30V to 5V)
Figure 42. Nonisolated Converter (15V to 1000V)
Application Note 30
AN30-28
an30fa
VSWVIN
15VIN
MUR120
3L1
1
7 0.1µF2000V 2.2M
D
S
0.1µF
Q1VN2222
8
1k 0.47µF
LT1072
GNDVC
FBNC
10M**1%
1000VOUT5W
200k
LT10041.2V
10k
1M
200k*
10k*
5kOUTPUTADJUST
*1% METAL FILM RESISTOR**VICTOREEN MAX-750-22L1 = PULSE ENGINEERING, INC #PE-6197
3.6k
180k
8
4
7
2µF
1k
AN30 F430.68µF
4N46
–
+A1
LT1006
= SEMTECH-FM-50
= INPUT GROUND
= OUTPUT COMMON
+
–
+LT1011
PRIMARY
SECONDARY
PIEZOCERAMICTRANSFORMER
15V
1N4148
Q12N3904 *1% METAL FILM RESISTOR
PIEZOCERAMIC TRANSFORMERSAVAILABLE FROM CHANNELINDUSTRIES, INC SANTA BARBARA, CA
1N4148
15V
100Ω
680Ω
2k
10µF +100µF
10VFLOATINGOUTPUT
FLOATINGOUTPUTCOMMON
2k
470pF
0.001µF
0.002µF
1k15V
VOUT3 2
9
11FB
VIN
LT1020
GND500k*
1.5M*
Figure 43. Isolated Output Converter (15V to 1000V)
Figure 44. Converter with 20,000V Isolation (15V to 10V)
Application Note 30
AN30-29
an30fa
+
+
V IN
V SW
1N30
26A
18V
FB
GND
LT10
71
V C
MUR
120
Q5*
WIN
DING
S FO
ROP
TION
AL±1
2V D
COU
TPUT
S
4k10
W0.
22µF
250V
50Ω
MUR
860
PULS
EEN
GINE
ERIN
G#P
E-64
780
DANG
ER! L
ETHA
L PO
TENT
IALS
PRE
SENT
IN S
CREE
NED
AREA
! DO
NOT
CONN
ECT
GROU
NDED
TES
T EQ
UIPM
ENT
4µH
PULS
EEN
GINE
ERIN
G#5
2901
GD
13A
1N58
31
OPTI
ONAL
B 7 9 5
6
12
MUR
120
S
•
• •
220k
*47
k1W
470µ
F25
0V
*1%
MET
AL F
ILM
RES
ISTO
R**
QLA3
02V0
10J2
L (M
ALLO
RY)
Q5 =
MTH
7N50
3k 22k
100Ω
100Ω
10µF
0.01
µF
50pF
Q64N
2882
0Ω
47
22k
0.3Ω
1.24
k*
220k
47k
47k
1/2W47
k1/
2W
2k15
k
Q4
Q3
Q2
NC 47k
36k
LT10
041.
2V0.
47µF
10k
2k
20Ω
AN30
F451µ
F
4.3M
Q1
20µF
90V
ACTO
140V
AC
INPU
T
R T
2A S
LOW
BLOW
+
1N40
05×4
–+
22µF
+
+
5V OUT
50µF
SPRA
GUE
TE-1
307
+
3000
µF**
100Ω
1/2W
3.8k
*
1.2k
*+
A1LT
1006
R T
= 2N
3904
= 2N
3906
= 1N
4148
= V1
50LA
20 (G
E)
= D5
04CS
(MID
WES
T
COM
PONE
NTS)
Figu
re 4
5. 1
00W
Off
Line
Sw
itchi
ng R
egul
ator
DA
NGER
! Let
hal P
oten
tials
Pre
sent
Application Note 30
AN30-30
an30fa
+
–
+
VIN28V
28V
470Ω240Ω
2k
28V
4N28
1N914
1N914
LT1011
10k
10k
10k
1k1M
MR1122
1mH
10,000µF
VOUTLT1083 OUTIN
ADJ
AN30 F46
12V1.5A
–12V1.5A
124Ω*
LT1086
ADJ
IN OUT
AN30 F47
1.07k*
100µFD11N4002
2.4k
30k
20k*
LT1004-2.5
30.1k*28
7
4
3
510k
1000µF
L1285µH
1k
MBR360HEAT SINK2N6667
DARLINGTON
HEAT SINK2N6667
DARLINGTON
10k
–
+LT1011
4700µFMDA201
+
–
124Ω*
LT1086
ADJ
IN OUT
1.07k*
100µFD21N4002
2.4k
30k
20k*
LT1004-2.5
30.1k*28
7
4
3
510k
1000µF
L1285µH
1k
MBR360
130VACTO 90VAC
STANCORP-8685
10k
–
+LT1011
4700µF
*1% FILM RESISTORS MDA = MOTOROLA L1 = PULSE ENGINEERING, INC. #PE-92106
MDA201
+
–
Q1
Q2
+
+
++
+
+
Figure 46. High Power Linear Regulator with Switching Preregulator
Figure 47. Dual Preregulated Supply (90V AC-130V AC to ±12V)
Application Note 30
AN30-31
an30fa
–
+
Q12N6667
1N4003
*1% FILM RESISTOR1MHY = DALE TD-5 TYPE
4500µF
LT10041.2V
240Ω*
2k
1MHY
10k
15k
10k
28VINPUT +
VZ
15k
OUTPUT
10k
AN30 F48
LT10042.5V
VZ68pF
1M
2.2k
1k
28V
LT1018
IN OUTLT350AADJ
Figure 48. Linear Regulator with Switching Preregulator
–
+
LT10131
2
3
330k9V
LT10041.2V
120k1%
AN30 F49
390k1%
5V20mA2N5434
+
–
LT10137
5
6
HP5082-2811
100µA8
4
9V
47k
47µF1N4148
L
10k
10k
2N2905
L = DALE TE-3/Q3/TASHORT CIRCUIT CURRENT = 30mA ≈ 75% EFFICIENCYSWITCHING PREREGULATOR CONTROLS DROP ACROSS FET TO 200mV
9V INPUT
VD = 200mV
+
Figure 49. Switching Preregulated Linear Regulator (9V to 5V)
Application Note 30
AN30-32
an30fa
+
–
+
LT1011COMPARATOR
28
150k
5k 5k
AN30 F50
1k 3k
1k
1mH*8V DC
5 1
1N4003
*DALE TD-5 THIS CIRCUIT IS DESIGNED TO REDUCE POWER DISSIPATION IN THE LT1035 OVER A 90V AC TO 140V AC INPUT RANGE
4500µF+
10µF
OUTPUTCONTROL
LOGIC
5V3AOUTPUT
4 2 3
3.9k
27k
1000pF
7
31
4
2N6667VIN
10V DC TO20V DC
VIN VOUTAUX EN
LT1035
GND
3V DC UNDERALL CONDITIONS
Figure 50. Low Dissipation Regulator (10V-20V to 5V)
+
–
+
VIN
4 9 11
0.001µF680pF
6
8
7
10µF
5VOUT
1M*1M*
909k*
200kOUTPUTTRIM
235.2VVOUT
LT1020GND
2.5VREF FB
825k*
270pF
1M
200kPREREGTRIM
HP5082-2810
AN30 F51
+220µF1N5817
DS
100mHDALE TE-5Q4-TA
IRFD9120
+V6V TO 10V
LT1020COMP
220k
*1% METAL FILM RESISTORGROUND UNUSED 74C04 INPUTS
74C04
Figure 51. Micropower Post Regulated Switching Regulator (6V-10V to 5V)
Application Note 30
AN30-33
an30fa
+
–
+
–
+
–
+
C1LT1011
*1% FILM RESISTORT1 = SPRAGUE 11Z-2003†SCRs = GE C-220B1MHY = DALE TD-5 TYPE
C2LT1011
A1LM301A
15V
3 4
1N4003 10000µF LT10041.2V
LT10042.5V
1MHY
T1
1 2
15V
82
3
83
2
7
1 0.1µF
200k
16k*
750Ω*
LT10041.2V
20k2.7k
–15V
100µF
0V TO 35V0A TO 10A(7.5A FOR LT1083)
11k*
1
7
4
4
–15V15k
10k15k
15V
1N4148
–15V–15V
15V
15V
100pF
15V2N3904
1µF
81
1k
1N40031N4003
82k
10k
1µF
20Ω
110AC
STANCORP-8675
20Ω
†
†
15V
••
+
VZ
VZ
LT1038 ORLT1083 +
16k*
11k*
AN30 F52
Figure 52. High Current Low Dissipation Preregulated Linear Regulator
–
+
+22µF
0.01µF
POST REGULATOR
2
11
3
4
VIN VOUT
FB
VOUT5V100mA
LT1020
AN30 F53
MAINTAINS LOW IQ (< 100µA)FOR ALL INPUT VOLTAGESSWITCHER EFFICIENCY = 85%POST REGULATOR EFFICIENCY = 82%OVERALL EFFICIENCY = 70%SWITCHING REGULATOR OUTPUT =2.5 × (1 + RA/RB). FOR A CLEAN OUTPUTFROM THE LINEAR REGULATOR SET TO VOUT + 1.2V
VREF
220k
+100µF
LT1020COMPARATOR
VIN7.5V TO 30V
TOVREF
(PIN4)
100µF
1.8M
1M
3.3M 30k
1k
2N3906
100k
10k
2M
RB1M2M
30k
RA1.5M
0.001µF
SWITCHINGREGULATOR
OUTPUT
4mH
30k
220k
8
7
2N3904
2N39042N2222
6
Figure 53. Switching Preregulator for Wide Input Voltage Range (7.5V-30V to 5V)
Application Note 30
AN30-34
an30fa
100µF
VIN
–VOUT
AN30 F54
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
2µF
100µF
+
+
+
0.002µF
R210µF
100µF
2µF
VOUT
AN30 F55
VIN
R1
R2R1
= =+ 1|VOUT| ))VREF2 – 40mV )) + 1|VOUT|
1.21V
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
+
+
+
2µF 100µF
VIN = –3.5V TO –15VVOUT = 2VIN + (LT1054 VOLTAGE LOSS) + (QX SATURATION VOLTAGE)
VIN
VIN
VOUT
AN30 F56
RX
+
–100µF
+
+
+
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
QX*
1N4001
VIN = 3.5V TO 15VVOUT ≈ 2VIN – (VL + 2VDIODE)VL = LT1054 VOLTAGE LOSS
VIN3.5V TO 15V
AN30 F57
1N4001
VOUT50mA
+
–100µF 2µF10µF
+++
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
1N4001
AN30 F58
1N4001
100µF 10µF
+VOUT
–VIN
2µF
++
+
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
Figure 54. Basic Voltage Inverter Figure 55. Basic Voltage Inverter/Regulator
Figure 56. Negative Voltage Doubler Figure 57. Positive Doubler
Figure 58. Switched Capacitor –VIN to +VOUT Converter
Application Note 30
AN30-35
an30fa
1N4002
HP5082-2810
VIN3.5 TO 15V
20k
1N40020.002µF
AN30 F59
2.2µF
R140k
VOUTSET
PIN 2LT1054 #1
–VOUTIOUT ≅ 100mA MAX
R2500k
1N4002
1N4002
1N4002 VIN = 3.5 TO 15VVOUT MAX ≈ –2VIN + [1054 VOLTAGE LOSS + 2(VDIODE)]
R2R1
= =+ 1|VOUT| ))VREF2 – 40mV )) + 1|VOUT|
1.21V
10µF 10µF
100µF
+
+
+10µF
+10µF
10µF
+
+
+10µF +
LT1054 #1
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
LT1054 #2
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
VIN3.5V TO 15V
–VOUT
AN30 F60
+VOUT
+
–
+
–
= 1N4001
VIN = 3.5V TO 15V+VOUT ≈ 2VIN – (VL + 2VDIODE)–VOUT ≈ –2VIN + (VL + 2VDIODE)VL = LT1054 VOLTAGE LOSS
100µF 10µF
10µF
10µF
100µF
100µF
+ +
+
+
+
+
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
20k
1N9141N914
VIN = 5V
TO PIN 4LT1054 #1
VOUT ≈ –12VIOUT = 25mA
VOUT ≈ 12VIOUT = 25mA
AN30 F61
1k
2N2219
10µF
100µF
10µF
10µF
100µF
5µF100µF
5µF+
+ +
+
+ ++
+
LT1054 #2
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
LT1054 #1
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
Figure 59. 100mA Regulating Negative Doubler
Figure 60. Dual Output Voltage Doubler
Figure 61. Switched Capacitor Converter (5V to ±12V)
Application Note 30
AN30-36
an30fa
5µF
100µF
20k 1N914
R120k
1N914
VIN = 3.5V TO 5.5VVOUT = 5VIOUT(MAX) = 50mA
1N914
1N5817
VIN3.5V TO 5.5V
AN30 F63
LTC1044
1
2
3
4
8
7
6
5
1µF
1µF0.002µF R2
125k 3k
1N914
R2125k
2N2219
VOUT = 5V
+
–
10µF+
+
+
++
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
0.002µF
HP5082-2810
VOUT = –5VIOUT = 0mA to 200mA
12V
R139.2k
R2200k
20k 10Ω1/2W
AN30 F64
10Ω1/2W10µF
5µF
200µF
10µF+
+
+
+
LT1054 #1
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
LT1054 #2
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
R2R1
= =+ 1|VOUT| ))VREF2 – 40mV )) + 1 |VOUT|
1.21V
Figure 62. Switched Capacitor Charge Pump-Based Voltage Multiplier (5V to ±12V)
Figure 63. Regulator (3.5V to 5V)
Figure 64. Regulating 200mA Converter (12V to –5V)
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREFC1
10µF
5V
–VOUT
AN30 F62
VOUT
+
+ +
+
+
+ +
+VOUT
100µF
= 1N4148
10µF
10µF
10µF
10µF
10µF
10µF
+
10µF
100µF+
+
Application Note 30
AN30-37
an30fa
20k
VOUT = –VIN (PROGRAMMED)
20k
15V
LT1004-2.52.5V
AN30 F65
AD55816
11
14
DIGITALINPUT
13 12
10µF
5µF
+
100µF+
+
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
0.03µF
VIN = 5V
50k
1N5817
1N5817
AN30 F66
–
+
10k
10k
10k
5.5k
2.5k
0.1µF
5V
LT1006
100µF
VOUT8V
50mA
2µF10µF
+
+
+LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
Figure 65. Digitally Programmable Negative Supply Figure 66. Positive Doubler with Regulation (5V to 8V)
2µF
VIN3.5V TO 15V
100µF R21M
1N4001 1N4001
AN30 F67
100µF
0.002µF
–VOUT
VIN = 3.5V TO 15VVOUT(MAX) ≈ –2VIN + (VL + 2VDIODE)VL = LT1054 VOLTAGE LOSS
R2R1
= =+ 1|VOUT| ))VREF2 – 40mV )) + 1|VOUT|
1.21V
10µF+
+
+
+
10µF+
LT1054
FB/SHDN
CAP+
GND
CAP –
V+
OSC
VREF
VOUT
R1, 20k
LTC1044
BOOST V+
1.5V TO 9V
VOUT = –V+
REQUIRED FOR V+ < 3V
TMIN ≤ TA ≤ TMAX
CAP+
GND
CAP –
10µF
AN30 F68
V+
OSC
LV10µF
VOUT
+
+
LTC1044
BOOST 2VIN3V TO 18V
REQUIRED FORV+ < 3V
CAP+
GND
CAP –
AN30 F69
V+
OSC
LVC1
10µF
C210µF
1M
IOUTR1
200Ω
1N914
VIN1.5V TO 9V
VOUT
+
+
Figure 67. Negative Doubler with Regulator Figure 68. Negative Voltage Converter
Figure 69. Voltage Doubler
Application Note 30
AN30-38
an30fa
3V+
LTC1044
BOOST VOUT6V
CAP+
GND
CAP –
AN30 F70
V+
OSC
LVC1
10µF
C210µF
IS
VOUT
+
+
CMOSLOGIC
NETWORK
1.2VCELL
×2LTC1044
BOOST VOUT
CAP+
GND
CAP –
AN30 F71
V+
OSC
LVC1
10µF
C210µF
IS 4.8V
SUPPLY CURRENT IS ≈ 3µA
VOUT
+
+
CMOSLOGIC
NETWORK
Figure 70. Voltage Doubler Figure 71. Generating CMOS Logic Supplyfrom 2 Mercury Batteries (2.4V to 4.8V)
VB9V LTC1044
BOOST +VB/24.5V
–VB/2–4.5V
REQUIREDFOR VB < 6V
CAP+
GND
CAP –
AN30 F72
V+
OSC
LVC1
10µF
3V ≤ VB ≤ 18VC210µF
OUTPUTCOMMON
VOUT
+
+
LTC1044
BOOST
CAP+
GND
CAP –
AN30 F73
V+
OSC
LVC1
10µF
C220µF
VOUT = –V+
1/4 CD4077
VOUT
+
+
LTC1044
BOOST
V+
CAP+
GND
CAP –
*THE EXCLUSIVE NOR GATE SYNCHRONIZES BOTH LTC1044s TO MINIMIZE RIPPLE
V+
OSC
LVC1
10µF
VOUT
+
*
Figure 72. Battery Splitter (9V to ±4.5V) Figure 73. Paralleling for Lower Output Resistance
LTC10441
BOOST
CAP+
GND
CAP –
V+
OSC
LV10µF
10µF
–V+VOUT
+
+
LTC10442
BOOST
CAP+
GND
CAP –
V+
OSC
LV
10µF
V+
VOUT
+
10µF
VOUT
AN30 F74
+
FOR VOUT = –2V+FOR VOUT = –3V+
Figure 74. Stacking for Higher Voltage
Application Note 30
AN30-39
an30fa
1M*
AN30 F75
FOR VOUT = 4V(20V)
FOR VOUT = 3V(15V)
LTC10441
BOOST
CAP+
GND
1M*
10µF
*REQUIRED FOR V+ < 3V
10µF
CAP –
V+
OSC
200Ω
V+ = 5V
1N914
2V+
10V 200Ω
LV10µF
VOUT
LTC10442
BOOST
CAP+
GND
CAP –
V+
OSC
LV
VOUT
+
1N914
+
10µF
VOUT
+
+
LTC1044
BOOST
CAP+
GND
2N39042N3906+EVEREADYEXP-30
3V
CAP –
V+100Ω
3V
OSC
LV1M
1
6
7
4.8M
5VOUTPUT
8
2
3
AN30 F76
4
150k
100kVOUT
ADJUST
200mV
LM10
C2100µF
1N914
VOUT
+
C110µF
+
1k
1k
–
+
REF AMP
–
+
OP AMP
1N914
330k
LTC1044
BOOST CAP+ GND
10µF
CAP –
V+
6
100µF
7
8.2k
50kVOUTADJ
3
2 18
4
39k
0.1µF
39k
9V
50k 200k
OSC
200k
LV VOUT+
+
10µF
AN30 F77
OUTPUT
+–
+LM10 C1–
C2+
C2–
–VOUT
8
7
6
5
1
2
3
4
+VOUT
C1+
VIN
GND
LT1026
+
C11µF
VIN
++
+VOUT
1µFC2
1µF
–VOUT
+1µF
AN30 F78
Figure 75. Voltage Tripler/Quadrupler
Figure 76. Regulated Voltage Up Converter (3V to 5V)
Figure 77. Regulated Negative Voltage Converter Figure 78. Dual Output Switched Capacitor Voltage Generator
Application Note 30
AN30-40
an30fa
+
REFOUT
VIN
LT1020
COMPNPN
COMPPNP
+IN
–IN OUT
FB
2
11
6
100k360k*1M*
VN2222
100k
4
5
8
7
39
0.001µF0.002µF
*1% METAL FILM RESISTOR
500k*
270k*
10µF
AN30 F79
+100µF
7VOUT20mA
–7VOUT20mA
0.001µF
GND
≈11V NO LOAD
≈ –11V NO LOAD
10k6VIN
8
7
6
5
1
2
31µF
1µF
1µF
4
+ 1µF+
+
+
LT1026
+
11
12
87
1413
1k
LTC1043
1k
Q1
Q3
S
SD D
470µF 38k
VOUT5V1A
22k2k
100pF
6
41
8LT10041.2VREFERENCE
12VIN12VIN
12k
ALL DIODES ARE 1N4148Q1, Q2, Q3 = IRF9531 P-CHANNELQ4 = IRF533 N-CHANNEL
470µF
12VIN
12VIN
1k
1k
Q4
AN30 F80
S
D
2
3
56
15
17
416
18
Q2S D
12V
12V
12V180pF
–
+
C1LT1011
Figure 79. Switched Capacitor-Based Converter (6V to ±7V)
Figure 80. High Power Switched Capacitor Converter (12V to 5V)
Application Note 30
AN30-41
an30fa
LT1032
470µF
5V
1N4148
470µF
VOUT13.7V AT NO LOAD12V AT 10mA
–VOUT–13.7V AT NO LOAD–12V AT 10mA
470µF
470µF
–5V
0V5V
2
14
5
9
12
3
6
8
11
1
fCLK = 1kHz
AN30 F81
1N4148
1N4148
1N4148
+
+
+
+–
+
AN30 F82
5
6
+
7
8
9
22k
51k
VIN
3
1N5819OR EQUIVALENT
–VOUT
1M
2N3904
+ 20µF
VOUT (NL) ≅ – (VIN – 1V)VOUT (5mA) ≅ – (VIN – 3V)IQ ≅ 300µA
0.0033µF
10µF
51k
1M
Figure 81. Voltage Multiplier (±5V to ±15V) Figure 82. Charge-Pump Negative Voltage Generator
–
+
AN30 F83
5
67
8
9
22k
51k
VIN
3
VOUT
1M
2N3904
10µF VOUT (NL) ≅ 2VIN – 1VVOUT (5mA) ≅ 2VIN – 3VIQ ≅ 300µA
0.0033µF
51k
1M
20µF
1N5819OR EQUIVALENT
+
+
Figure 83. Charge Pump Voltage Doubler
+
REFOUT
VIN
LT1020
COMPNPN
COMPPNP
+IN
–IN OUT
FB
2
11
6
100k499k*1M*
VN2222
100k
4
5
8
7
39
0.001µF0.002µF
*1% METAL FILM RESISTOR
500k*
500k*
10µF
AN30 F84
+10µF
5VOUT100mA
–5VOUT75mA
0.001µF
GND
10k
8
VIN ≥ 6V
7
6
5
1
2
310µF
100µF
4
+
+
LT1054
Figure 84. High Current Switched Capacitor Converter (6V to ±5V)
Application Note 30
AN30-42
an30fa
VSW
VC
1k1µF
VIN
LT1071
GNDFB
MUR120
MUR120
1
3
11
10
470µF
2700µF
*1% FILM RESISTORL1 = PULSE ENGINEERING, INC #PE-65108 PULSE ENGINEERING, INC
PO BOX 12235SAN DIEGO, CA 92112(619) 268-2400
•
• +10µF
3.01k*
1k*
AN30 F85
–12V
+LT1086-12
MUR120
L1
2
40.2µF
9
8
7
470µF•
•
+10µF
12V
+LT1086-12
MUR120
6
5• +VOUT5V1A
2k2W
22µF
12VIN +
+
VSW
VC
VIN
LT1071
GNDFB NC
MUR120
MUR120
OPTIONAL FORLOWEST IQ CURRENT
1
3
11
10
470µF
C12700µF
R31M
R11M*
R710k
*1% FILM RESISTORL1 = PULSE ENGINEERING, INC #PE-65108
+10µF
R2*453k
C30.005µF
12VIN
R410k
LT10041.2V
R5180k
AN30 F86
–12V
+LT1086-12
MUR120 OFF
ONL1
2
40.2µF
9
8
7
470µF+
10µF
12V
+LT1086-12
MBR360
1N4148 1N4148
6
5 +VOUT5V1A
2k2W
22µF
12VIN +
•
•
•
•
•
–
+C247µF
R6200Ω
+A1
1/2 LT1017
12VIN
10pF
74C04 (1/6)74C04 (5/6)
Figure 85. Multioutput Flyback Converter (12V to 5V, ±12V)
Figure 86. Multioutput Transformer Coupled Low Quiescent Current Converter (12V to 5V, ±12V)
Application Note 30
AN30-43
an30fa
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen-tation that the interconnection of its circuits as described herein will not infringe on existing patent rights.
VSW
VC
VIN
L1150µH
5V
MUR120 1N5919A*
5.6V
10µF
LT1072
GNDFB
R31k
C11µF
120k
270k
C21µF
AN30 F87
Q12N3904
VP-PCOMMAND
+
+
R1**VOUT = 12V10.7k, 0.1%VOUT = 12.75V11.5k, 0.1%
*ZENER DIODE OPTIONAL**IRC #CM55-T13L1 = PULSE ENGINEERING, INC #PE-52645
R2**1.24k0.1%
100µF
VP-POUTPUT200mA MAX+
VSW
VC
VIN
L1150µH
5V
MUR120
10µF
LT1072
GNDFB
1k
0.68µF 16k
120k
270k
74C04OR EQUIVALENT
1µF
AN30 F87
Q12N3904
VP-PLOCK
VP-PCOMMAND
+
+
*IRC #CM55-T13L1 = PULSE ENGINEERING, INC #PE-52645
1.2k
200µF+
–
+A2
LT1010
680pF
VP-POUTPUT150mA MAX
1N914≈17V
A1LT1006
VOUT = 12V*10.7k, 0.1%
VOUT = 12.75V*11.5k, 0.1%
1N914
LT10041.2V
10k
1.24k*0.1%
Figure 87. Basic Flash EPROM VP-P Pulse Generator (5V to 12.75V or 12V)
Figure 88. High Repetition Rate VP-P Pulse Generator (5V to 12.75V or 12V)
Application Note 30
AN30-44
an30fa
LT/TP 0403 REV A • PRINTED IN USA
LINEAR TECHNOLOGY CORPORATION 1989
Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417(408) 432-1900 FAX: (408) 434-0507 www.linear.com
V SW
V C
V IN LT10
72CN
8
GND
1N41
48
100Ω
2N22
22
V FB
E1
VN22
22LL
3300
µF
3.01
k*
1µF
E2
2N22
22
3.6k
1k1k
*
AN30
F89
20Ω
4.3K
20Ω
IRFZ
44†
(HEA
T SI
NK)
MBR
1535
(HEA
T SI
NK)
L1 55µH V O
UT5V 10
A
1µF
390Ω
2µF
2N39
06
1N41
48
200Ω
1.4k
*
7.5k
*0.
1µF
1µF
LT10
04-2
.5
*1%
FIL
M R
ESIS
TORS
**V B
E M
ATCH
ING
OF 2
0mV
AT 2
40µA
† INTE
RNAT
IONA
L RE
CTIF
IER
L1 =
PUL
SE E
NGIN
EERI
NG, I
NC #
PE-9
2117
+
0.01
8Ω
2N39
06**
2N39
06**
1k*
5.1k
1pF
20k
50k
LT31
7AH
+
INPU
T15
V TO
35V
100µ
F+
Figu
re 8
9. H
igh
Curr
ent P
ositi
ve B
uck
with
Boo
tstra
pped
NM
OS G
ate
Driv
e (1
5V-3
5V to
5V)
