Power - 1.8W ; Current - 3.6Amps Voltage - 0.5V ; Thickness - 0.2mm ;
DC1989B-A - LTM4676AEY Dual 13A or Single 26A µModule ......The output voltage is adjustable from...
Transcript of DC1989B-A - LTM4676AEY Dual 13A or Single 26A µModule ......The output voltage is adjustable from...
1dc1989baf
DEMO MANUAL DC1989B-A
DESCRIPTION
LTM4676AEYDual 13A or Single 26A µModule Regulator
with Digital Power System Management 2× LTM4676A, 50A
Demonstration circuit 1989B-A is a high efficiency, high density, µModule regulator with 4.5V to 17V input range. The output voltage is adjustable from 0.5V to 4V, and it can supply 50A maximum load current. The demo board has two LTM®4676A µModule regulators, and the LTM4676A is a dual 13A or single 26A step-down regulator with PMBus power system management. Please see LTM4676A data sheet for more detailed information
DC1989B-A powers up to default settings and produces power based on configuration resistors without the need for any serial bus communication. This allows easy evalu-ation of the DC/DC converter. To fully explore the extensive power system management features of the part, download the GUI software LTpowerPlay™ onto your PC and use LTC’s I2C/SMBus/PMBus dongle DC1613A to connect to
L, LT, LTC, LTM, Linear Technology, the Linear logo, Burst Mode, Dust Networks and Dust are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
the board. LTpowerPlay allows the user to reconfigure the part on the fly and store the configuration in EEPROM, view telemetry of voltage, current, temperature and fault status
GUI Download
The software can be downloaded from:
http://www.linear.com/ltpowerplay
For more details and instructions of LTpowerPlay, please refer to LTpowerPlay GUI for LTM4676A Quick Start Guide.
Design files for this circuit board are available at http://www.linear.com/demo/DC1989B-A
Figure 1. 2× LTM4676A; 50A DC1989B-A Demo Circuit
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DEMO MANUAL DC1989B-A
QUICK START PROCEDUREDemonstration circuit 1989B-A is easy to set up to evaluate the performance of the LTM4676AEY. Refer to Figure 2 for the proper measurement equipment setup and follow the procedure below.
1. With power off, connect the input power supply to VIN (4.5V to 17V) and GND (input return).
2. Connect the output load between VOUT0 and GND (Initial load: no load).
3. Connect the DVMs to the input and outputs. Set default switch position: SW1: ON; SW2: ON.
4. Turn on the input power supply and check for the proper output voltages. VOUT0 should be 1V ±1%.
5. Once the proper output voltages are established, ad-just the loads within the operating range and observe the output voltage regulation, ripple voltage and other parameters.
6. Connect the dongle and control the output voltages from the GUI. See “LTpowerPlay GUI for the LTM4676A Quick Start Guide” for details.
Note: When measuring the output or input voltage ripple, do not use the long ground lead on the oscilloscope probe. See Figure 3 for the proper scope probe technique. Short, stiff leads need to be soldered to the (+) and (–) terminals of an output capacitor. The probe’s ground ring needs to touch the (–) lead and the probe tip needs to touch the (+) lead.
Connecting a PC to DC1989B-A
You can use a PC to reconfigure the power management features of the LTM4676A such as: nominal VOUT, margin set points, OV/UV limits, temperature fault limits, sequenc-ing parameters, the fault log, fault responses, GPIOs and other functionality. The DC1613A dongle may be plugged when VIN is present.
PERFORMANCE SUMMARY Specifications are at TA = 25°C
PARAMETER CONDITION VALUE
Input Voltage Range 4.5V to 17V
Output Voltage, VOUT0 VIN = 4.5 to 17V, IOUT0 = 0A to 50A 0.5 to 4V, Default: 1V
Maximum Output Current, IOUT0 VIN = 4.5 to 17V, VOUT = 0.5V to 4V 50A
Typical Efficiency VIN = 12V, VOUT = 1V, IOUT = 50A 80.4%
Default Switching Frequency 350kHz
Table 1. LTM4676/LTM4676A Demo Cards for Up to 130A Point-of-Load Regulation
MAXIMUM OUTPUT CURRENT NUMBER OF OUTPUT VOLTAGESNUMBER OF LTM4676/LTM4676A µMODULE
REGULATORS ON THE BOARD DEMO BOARD NUMBER
13A, 13A 2 1× LTM4676 DC1811A/DC1811B-A
13A, 13A 2 1× LTM4676A DC1811B-B
26A 1 1× LTM4676 DC2087A
50A 1 2× LTM4676A DC1989B-A
75A 1 3× LTM4676A DC1989B-B
100A 1 4× LTM4676A DC1989B-C
100A 1 1× LTM4676 (+ 3× LTM4620A) DC2106A-A
130A 1 1× LTM4676 (+ 3× LTM4630) DC2106A-B
100A 1 1× LTM4676A (+ 3× LTM4620A) DC2106B-A
130A 1 1× LTM4676A (+ 3× LTM4630) DC2106B-B
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DEMO MANUAL DC1989B-A
QUICK START PROCEDURE
Figure 2. Proper Measurement Equipment Setup
Figure 3. Measuring Output Voltage Ripple
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DEMO MANUAL DC1989B-A
QUICK START PROCEDURE
Figure 4. Demo Setup with PC
Figure 5. Efficiency vs Load Current at VIN = 5V and VIN = 12V
Efficiency vs Load Current100
90
70
80
60
50
LOAD CURRENT (A)
EFFI
CIEN
CY (%
)
0 10 40 5030205 15 453525
VIN = 5VVIN = 12V
VOUT0 = 1V
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DEMO MANUAL DC1989B-A
QUICK START PROCEDURE
Figure 6. Output Voltage VOUT0 vs Load Current (VOUT0 RANGE = 1)
Figure 9. Current Sharing at VIN = 12V, VOUT0 = 1V (Based on the Current Readback)
Figure 7. Output Voltage Ripple at VIN = 12V, VOUT0 = 1V, IOUT0 = 50A
Figure 10. Total Current Readback vs Load Current at VIN = 12V, VOUT0 = 1V
Figure 8. Thermal Performance at VIN = 12V, VOUT0 = 1V, IOUT0 = 50A, TA = 23.8°C, Air Flow 200LFM
VOUT0 (20MHz BW) [10mV/DIV]
LOAD CURRENT (A)0
PHAS
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14
12
8
10
6
2
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0
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IOUT_PHASE#1IOUT_PHASE#2IOUT_PHASE#3IOUT_PHASE#4
LOAD CURRENT (A)0
TOTA
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CK (A
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55
50
40
45
35
25
30
15
5
10
20
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VOUT0 (20MHz BW) [50mV/DIV]
25A TO 50A LOAD STEP
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DEMO MANUAL DC1989B-A
QUICK START PROCEDURE
LTpowerPlay Software GUI
LTpowerPlay is a powerful Windows based development environment that supports Linear Technology power sys-tem management ICs, including the LTM4676A, LTC3880, LTC3883, LTC2974 and LTC2978. The software supports a variety of different tasks. You can use LTpowerPlay to evaluate Linear Technology ICs by connecting to a demo board system. LTpowerPlay can also be used in an offline mode (with no hardware present) in order to build a mul-tichip configuration file that can be saved and reloaded at a later time. LTpowerPlay provides unprecedented diagnostic and debug features. It becomes a valuable diagnostic tool during board bring-up to program or tweak the power management scheme in a system, or to diagnose power issues when bringing up rails. LTpowerPlay utilizes the DC1613A USB-to-SMBus controller to communicate with one of many potential targets, including the LTM4676A, the
LTC3880 and the LTC3883’s demo system, or a customer board. The software also provides an automatic update feature to keep the software current with the latest set of device drivers and documentation. The LTpowerPlay software can be downloaded from:
http://linear.com/ltpowerplay
To access technical support documents for LTC Digital Power Products visit Help. View online help on the LTpowerPlay menu.
LTpowerPlay QUICK START PROCEDURE
The following procedure describes how to use LTpowerPlay to monitor and change the settings of LTM4676A.
1. Download and install the LTPowerPlay GUI:
http://linear.com/ltpowerplay
Figure 11. LTpowerPlay Main Interface
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DEMO MANUAL DC1989B-A
QUICK START PROCEDURE2. Launch the LTpowerPlay GUI.
a. The GUI should automatically identify the DC1989B-A. The system tree on the left hand side should look like this:
b. A green message box shows for a few seconds in the lower left hand corner, confirming that LTM4676A is communicating:
c. In the Toolbar, click the “R” (RAM to PC) icon to read the RAM from the LTM4676A. This reads the configuration from the RAM of LTM4676A and loads it into the GUI.
d. If you want to change the output voltage to a different value, like 1.5V. In the Config tab, type in 1.5 in the VOUT_COMMAND box, like this:
Then, click the “W” (PC to RAM) icon to write these register values to the LTM4676A. After finishing this step, you will see the output voltage will change to 1.5V.
If the write is successful, you will see the following message:
e. You can save the changes into the NVM. In the tool bar, click “RAM to NVM” button, as following
f. Save the demo board configuration to a (*.proj) file. Click the Save icon and save the file. Name it whatever you want.
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DEMO MANUAL DC1989B-A
PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 10 CIN1, CIN2, CIN4-CIN11 CAP., X5R, 10µF, 35V, 10%, 1210 AVX, 1210DD106KAT2A
2 1 CIN3 CAP., 150µF, 35V, ALUMINUM ELECTR. SUN ELECTRONIC INDUSTRIES CORPORATION, 35CE150AX
3 10 COUT1, COUT6, COUT7, COUT9, COUT12, COUT17, COUT18, COUT20
CAP., X5R, 100µF, 6.3V, 20% 1210 AVX, 12106D107KAT2A
4 1 C3 CAP., X7R, 220pF, 16V, 10%, 0603 AVX, 0603YC221KAT2A
5 6 COUT4, COUT5, COUT8, COUT15, COUT16, COUT19
CAP., 330µF, 6.3V, POSCAP, D3L PANASONIC, 6TPF330M9L
6 1 C7 CAP., X7R, 470pF, 25V, 10%, 0603 AVX, 06033C471KAT2A
7 1 C4 CAP., X7R, 3.3nF, 16V, 10%, 0603 AVX, 0603YC332KAT2A
8 1 C32 CAP., X5R, 100nF, 16V, 10%, 0603 AVX, 0603YD104KAT2A
9 1 C70 CAP., X5R, 1µF, 25V, 10%, 0805 AVX, 08053D105KAT2A
10 2 C65, C68 CAP., X5R, 1µF, 25V, 10%, 1206 AVX, 12063D105KAT2A
11 1 C67 CAP., X7R, 0.1µF, 25V, 10%, 1206 AVX, 12063C104KAT2A
12 1 C64 CAP., X5R, 4.7µF, 25V, 10%, 0603 MURATA, GRM188R61E475KE11D
13 1 C66 CAP., X5R, 0.22µF, 25V, 10%, 0805 AVX, 08053D224KAT2A
14 2 D1, D2 LED, 0603 GREEN WURTH ELEKTRONIK 150060GS75000
15 1 D3 LED, 0603 RED WURTH ELEKTRONIK 150060SS75000
16 1 D8 DIODE SCHOTTKY 20V 500MA SOD882 NXP SEMI. PMEG2005AEL
17 1 Q2 MOSFET P-CH 20V 5.9A TO-236 VISHAY SI2365EDS-T1-GE3
18 2 Q3, Q4 MOSFET N-CH 60V 115MA SOT-23 FAIRCHILD 2N7002K
19 2 Q11, Q12 XSTR, N-CH 40V 14A TO-252 VISHAY SUD50N04-8M8P-4GE3
27 1 Q19 P-CHANNEL 30-V MOSFET DIODES INC., DMP3130L-7
28 1 R20 RES., CHIP, 22.6k, 1%, 0603 VISHAY CRCW060322K6FKEA
29 23 R2, R4, R18, R25, R26, R30, R32, R47, R48, R50, R56, R58, R60, R72, R74, R104, R119, R120, R121, R122, R131, R135, R143
RES., CHIP, 0Ω, 1%, 0603 VISHAY CRCW06030000Z0EA
30 4 R49, R51, R53, R54 RES., CHIP, 0Ω, 1%, 2010 VISHAY CRCW20100000Z0EF
31 15 R6, R7, R8, R9, R10, R11, R12, R15, R35, R36, R39, R64, R78, R116, R130
RES., CHIP, 10k, 1%, 0603 VISHAY CRCW060310K0FKEA
32 1 R14 RES., CHIP, 2.8k, 1%, 0603 VISHAY CRCW06032K80FKEA
33 2 R40, R42 RES., CHIP, 1.65k, 1%, 0603 VISHAY CRCW06031K65FKEA
34 2 R16, R41 RES., CHIP, 10Ω, 1%, 0603 VISHAY CRCW060310R0FKEA
35 1 R112 RES., CHIP, 100Ω, 1%, 0603 VISHAY CRCW0603100RFKEA
36 1 R113 RES., CHIP, 576Ω, 1%, 0603
37 1 R19 RES., CHIP, 787Ω, 1%, 0603 PANASONIC ERJ-3EKF7870V
38 1 R27 RES., CHIP, 51k, 1%, 0603 VISHAY CRCW060351K0FKEA
39 1 R141 RES., CHIP, 15.8k, 1%, 0603 VISHAY CRCW060315K8FKEA
40 2 R134, R144 RES., CHIP, 4.99k, 1%, 0603 VISHAY CRCW06034K99FKEA
41 2 R85, R124 RES., CHIP, 200Ω, 1%, 0603 VISHAY CRCW0603200RFKEA
42 1 R86 RES., CHIP, 127Ω, 1%, 0603 VISHAY CRCW0603127RFKEA
43 1 R123 RES., CHIP, 1M, 1%, 0603 VISHAY CRCW06031M00FKEA
44 1 R105 RES., CHIP, 681k, 1%, 0603 VISHAY CRCW0603681KFKEA
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DEMO MANUAL DC1989B-A
PARTS LISTITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
45 1 R106 RES., CHIP, 3.3Ω, 1%, 0603 VISHAY CRCW06033R30FKEA
46 1 R107 RES., CHIP, 82.5Ω, 1%, 0603 VISHAY CRCW060382R5FKEA
47 2 R108, R118 RES., CHIP, 0.01Ω, 1%, 2010 VISHAY, WSL2010R0100FEA
48 1 R109 RES., CHIP, 100k, 1%, 0603 VISHAY CRCW0603100KFKEA
49 1 R110 TRIMMING POTENTIOMETER, 5k BOURNS, 3386P-1-502LF
50 2 R111, R115 RES., CHIP, 20k, 1%, 0603 VISHAY CRCW060320K0FKEA
51 1 R114 RES., CHIP, 154k, 1%, 0603 VISHAY CRCW0603154KFKEA
52 1 R117 RES., CHIP, 2Ω, 1%, 0603 VISHAY CRCW06032R00FKEA
53 2 U1, U2 IC, LTM4676AEY LINEAR TECH., LTM4676AEY#PBF
54 1 U9 IC, 24LC025T-I/ST SOT-23 6-LEAD MICROCHIP, 24LC025T-I/ST
55 1 U6 IC., LT1129CS8-5, S8 LINEAR TECH. LT1129CS8-5#PBF
56 1 U7 IC., LTC6992-1, S6-TSOT LINEAR TECH. LTC6992CS6-1#PBF
57 1 U8 IC., LT1803IS5, S5-TSOT LINEAR TECH. LT1803IS5#PBF
Additional Demo Board Circuit Components
1 0 COUT2, COUT3, COUT10, COUT11, CIN12-CIN19, COUT21-COUT25, COUT27, COUT29-COUT33, COUT35-COUT37, COUT26, COUT28, COUT34, COUT38, C1, C2, C6, C8-C20
CAP., OPTIONAL
2 0 C69 OPT
3 0 D4, D5 OPT SOD323
4 0 R3, R5, R17, R33, R34, R38, R59, R61, R63, R73, R75, R77, R126, R127, R128, R132, R133, R136, R137, R139, R140, R142, R1, R13, R29, R37, R57, R62, R71, R76, R21, R22, R23, R24, R43, R44, R45, R46, R65, R66, R67, R68, R69, R70, R79-R84, R102, R103, R138
RES., OPTIONAL
5 0 U3, U4 OPTIONAL
Hardware: For Demo Board Only
1 23 E2-E24 TESTPOINT, TURRET, 0.062" MILL-MAX, 2308-2-00-80-00-00-07-0
2 2 JP1, JP2 HEADER, 1X3 PIN 0.079" SINGLE ROW SULLIN, NRPN031PAEN-RC
3 2 XJP1, XJP2 SHUNT, 0.079" CENTER SAMTEC, 2SN-KB-G
4 4 J1, J2, J3, J4 STUD, TESTPIN PEM KFH-032-10
5 8 J1, J2, J3, J4 (x2) NUT, BRASS 10-32 ANY #10-32
6 4 J1, J2, J3, J4 RING, LUG #10 KEYSTONE 8205
7 4 J1, J2, J3, J4 WASHER, TIN PLATED BRASS ANY #10EXT BZ TN
8 2 J5, J6 JACK, BANANA KEYSTONE 575-4
9 1 J7 CONN HEADER 12POS 2MM STR DL PCB FCI 98414-G06-12ULF
10 1 J12 CONN RECEPT 2MM DUAL R/A 14POS (F) SULLINS, NPPN072FJFN-RC
11 1 J13 HEADER 14POS 2MM R/A GOLD (M) MOLEX, 87760-1416
12 2 J10, J11 CONN, BNC, 5PINS CONNEX, 112404
13 1 J14 HEADER, 4 PINS, SHROUDED HIROSE, DF3A-4P-2DSA
14 2 SW1, SW2 CONNECTOR, SUB MINIATURE SLIDE SWITCHES C&K., JS202011CQN
15 4 (STAND-OFF) STAND-OFF, NYLON 0.50" tall, SNAP ON KEYSTONE, 8833
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DEMO MANUAL DC1989B-A
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SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
16
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
A
+C
OU
T433
0uF
R5
OPT
C3
220p
F
R25
0
R21
(OPT
)
R8
10K
E7VD
D25
R3
OPT
R4
0
CO
UT2
OPT
R22
(OPT
)
CIN
410
uF
R2
0
CIN
610
uF
CO
UT1
0O
PT
R26 0
R12
10K
R16
10
R1
OPT
P1
U1
LTM
4676
AE
Y
VO
UT0
A1
VO
UT0
A2
VO
UT0
A3
VO
UT0
D1
ISN
S0b
-E
1
ISN
S0b
+F1
ISNS1b-G1
ISNS1b+H1
VOUT1J1
VOUT1J2
VOUT1J3
VOUT1K1
VO
UT0
B1
VO
UT0
B2
VO
UT0
B3
VO
UT0
D2
ISN
S0a
-E
2
ISN
S0a
+F2
ISNS1a-G2
ISNS1a+H2
VOUT1K2
VOUT1K3
VOUT1L1
VOUT1L2
VO
UT0
C1
VO
UT0
C2
VO
UT0
C3
VO
UT0
D3
GNDA4
GNDA6
GNDA7
GNDA8
VOUT1L3
VOUT1M1
VOUT1M2
VOUT1M3
GNDA9
GNDA10
GNDB4
GNDB5
AS
EL
G4
FSW
PH
CFG
H4
GNDB6
GNDB7
GNDB8
GNDB9
GP
IO0
E4
GP
IO1
F4
SN
UB
0A
5
GNDC4
TSN
S0b
C5
TSN
S0a
D5
ALE
RT
E5
RU
N0
F5
VO
UT0
CFG
G5
VTR
IM0C
FGH
5
TSNS1aJ5
TSNS1bK5
GNDC6
SNUB1M5
GNDC7
GNDC8
GNDC9
SD
AD
6S
CL
E6
RU
N1
F6
VO
UT1
CFG
G6
VTR
IM1C
FGH
6
VD
D25
J6
WP
K6
GNDD4
GNDE3
GNDF3
GNDF10
GNDG3
GNDG10
SY
NC
E7
GNDM9
GNDM10
SH
AR
E_C
LKH
7
VD
D33
J7
GNDG11
GNDG12
GNDL8GNDL7
GNDL9
GNDH3
CO
MP
0bD
8C
OM
P0a
E8
SGNDF7
SGNDF8
COMP1aH8
COMP1bJ8
GNDH10
GNDJ4
GNDM8
VO
SN
S0+
D9
VO
SN
S0-
E9
INTV
CC
F9
INTV
CC
G9
VOSNS1H9
VORB1J9
GNDJ10
GNDL4
GNDL5
GNDK4
SW
0B
10
DNCE11
VO
RB
0+D
10
VO
RB
0-E
10
GNDL6
GNDK7
GNDK8
GNDK9
DNCC10
SW1L10
GNDM4
VIN
H0
B12
VIN
H0
B11
VIN
H0
A12
VIN
H0
A11
DNCK10
VIN
LF1
2
GNDM6
DNCH11
VINH1H12
VINH1J11
VINH1J12
VINH1K11
VIN
H0
E12
VIN
H0
D12
VIN
H0
D11
VIN
H0
C12
VIN
H0
C11
VIN
LF1
1
GNDM7
VINH1K12
VINH1L11
VINH1L12
VINH1M11
VINH1M12
SGNDG7
SGNDG8
GNDD7
R24
(OPT
)
+C
OU
T833
0uF
CIN
110
uF12
10
P3
R23
(OPT
)
C2
OPT
CO
UT6
100u
F12
10
+C
IN3
150u
F
R20
22.6
K
R10
10K
R19
787
E2
INTV
CC
R13
OPT
E8
GN
D0_
SNSJ1
VIN
R9
10K
R17
OPT
R7
10K
J2
GN
D
R18 0
P5
P2
R11
10K
C4
3.3n
F
C5
10nF
E3VI
N
CIN
710
uF
C1
OPT
R14
2.8K
CIN
210
uF12
10
CO
UT9
100u
F
E4G
ND
R15
10K
E6VO
UT0
_SN
S
R12
00
SW1
1
2
34
5
6
+C
OU
T533
0uF
CIN
510
uF
J3VO
UT0
CO
UT1
100u
F
CO
UT7
100u
F12
10
R6
10K
E5VD
D33
J4
GN
D
P4
CO
UT3
OPT
CO
UT1
1O
PT
C6
OPT
11dc1989baf
DEMO MANUAL DC1989B-A
SCHEMATIC DIAGRAM5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
OPTIONAL JUMPER FOR SINGLE
OUTPUT CONFIGURATION
ON
OFF
RU
N1
1210
0.035 VIA
TESTPOINTS
1210
1210
1210
1210
6.3V
1210
1210
0805
0805
1210
6.3V
1210
1210
OPT
OPT
6.3V
µMo
dule
REGU
LATO
R W
ITH
DIGI
TAL
POW
ER M
ANAG
EMEN
T
GPI
O1B
RU
N1
SHAR
E_C
LK
ALER
TB
SCL
SDA
GPI
O0B
SYN
C
VOSN
S1
VIN
VOU
T0
VIN
VOU
T1
VOU
T0VO
UT1
VOSN
S0+
VOSN
S0-
SHAR
E_C
LK
ALER
TB
CO
MP0
CO
MP1
SCL
SDA
GPI
O0B
RU
N0
GPI
O1B
RU
N1
SYN
C
RU
N0
RU
N1
GPI
O0B
GPI
O1B
CO
MP0
CO
MP1
VOSN
S0+
VOSN
S1
VOSN
S0-
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
26
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
ASI
ZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
26
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
ASI
ZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
26
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
A
P10
CO
UT1
4O
PT
SW2
1
2
34
5
6
C9
OPT
CO
UT2
010
0uF
R47
0
R32
0
R30
0
R42
1.65
K
C11
OPT
CIN
1010
uF
R50
0
CO
UT1
3O
PT
R46
(OPT
)
R39
10K
J6
GN
D
C7
R35
10K
E9VO
UT1
_SN
S
+C
OU
T19
330u
F
R54
020
10
R45
(OPT
)
R27
R38
OPT
R53
020
10
R28
OPT
R51
020
10
E10
GN
D1_
SNS
R11
90
CIN
1110
uF
CO
UT1
710
0uF
1210
R34
OPT
R31
OPT
P9
CO
UT2
2O
PT
C10
OPT
R56
0
P7
R43
(OPT
)
J5VO
UT1
+C
OU
T16
330u
F
R40
1.65
k
R33
OPT
R41
10
CIN
810
uF
C8
OPT
R29
OPT
C12
10nF
R44
(OPT
)
R36
10K
P8
CO
UT1
810
0uF
1210
CO
UT2
1O
PT
+C
OU
T15
330u
F
R49
020
10
P6
CO
UT1
210
0uF
R37
OPT
R48
0
U2
LTM
4676
AE
Y
VO
UT0
A1
VO
UT0
A2
VO
UT0
A3
VO
UT0
D1
ISN
S0b
-E
1
ISN
S0b
+F1
ISNS1b-G1
ISNS1b+H1
VOUT1J1
VOUT1J2
VOUT1J3
VOUT1K1
VO
UT0
B1
VO
UT0
B2
VO
UT0
B3
VO
UT0
D2
ISN
S0a
-E
2
ISN
S0a
+F2
ISNS1a-G2
ISNS1a+H2
VOUT1K2
VOUT1K3
VOUT1L1
VOUT1L2
VO
UT0
C1
VO
UT0
C2
VO
UT0
C3
VO
UT0
D3
GNDA4
GNDA6
GNDA7
GNDA8
VOUT1L3
VOUT1M1
VOUT1M2
VOUT1M3
GNDA9
GNDA10
GNDB4
GNDB5
AS
EL
G4
FSW
PH
CFG
H4
GNDB6
GNDB7
GNDB8
GNDB9
GP
IO0
E4
GP
IO1
F4
SN
UB
0A
5
GNDC4
TSN
S0b
C5
TSN
S0a
D5
ALE
RT
E5
RU
N0
F5
VO
UT0
CFG
G5
VTR
IM0C
FGH
5
TSNS1aJ5
TSNS1bK5
GNDC6
SNUB1M5
GNDC7
GNDC8
GNDC9
SD
AD
6S
CL
E6
RU
N1
F6
VO
UT1
CFG
G6
VTR
IM1C
FGH
6
VD
D25
J6
WP
K6
GNDD4
GNDE3
GNDF3
GNDF10
GNDG3
GNDG10
SY
NC
E7
GNDM9
GNDM10
SH
AR
E_C
LKH
7
VD
D33
J7
GNDG11
GNDG12
GNDL8GNDL7
GNDL9
GNDH3
CO
MP
0bD
8C
OM
P0a
E8
SGNDF7
SGNDF8
COMP1aH8
COMP1bJ8
GNDH10
GNDJ4
GNDM8
VO
SN
S0+
D9
VO
SN
S0-
E9
INTV
CC
F9
INTV
CC
G9
VOSNS1H9
VORB1J9
GNDJ10
GNDL4
GNDL5
GNDK4
SW
0B
10
DNCE11
VO
RB
0+D
10
VO
RB
0-E
10
GNDL6
GNDK7
GNDK8
GNDK9
DNCC10
SW1L10
GNDM4
VIN
H0
B12
VIN
H0
B11
VIN
H0
A12
VIN
H0
A11
DNCK10
VIN
LF1
2
GNDM6
DNCH11
VINH1H12
VINH1J11
VINH1J12
VINH1K11
VIN
H0
E12
VIN
H0
D12
VIN
H0
D11
VIN
H0
C12
VIN
H0
C11
VIN
LF1
1
GNDM7
VINH1K12
VINH1L11
VINH1L12
VINH1M11
VINH1M12
SGNDG7
SGNDG8
GNDD7
CIN
910
uF
P11
12dc1989baf
DEMO MANUAL DC1989B-A
SCHEMATIC DIAGRAM5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
1210
0.035 VIA
TESTPOINTS
1210
1210
1210
1210
1210
1210
0805
0805
1210
1210
1210
µMo
dule
REGU
LATO
R W
ITH
DIGI
TAL
POW
ER M
ANAG
EMEN
T
SHAR
E_C
LK
ALER
TB
SCL
SDA
SYN
C
GPI
O0B
VIN
VOU
T0
VIN
VOU
T0
VOSN
S0+
VOSN
S0+
VOSN
S0-
SHAR
E_C
LK
ALER
TBC
OM
P0
CO
MP0
SCL
SDA
GPI
O0B
RU
N0
SYN
C
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
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ONTA
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LOGY
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TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
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CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
36
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
ASI
ZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
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T EF
FORT
TO
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S RE
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INTE
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LOGY
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LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
36
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
ASI
ZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
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GN A
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MEE
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SUPP
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CIFI
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EMAI
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HE C
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S RE
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LITY
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ROPE
R AN
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S EN
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ERIN
G FO
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CUIT
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RY T
O LI
NEAR
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OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
36
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
A
CIN
12O
PT
+C
OU
T26
OPT
CO
UT2
7O
PT
R69
(OPT
)
CO
UT2
4O
PT
P17
C13
OPT
C14
OPT
C15
OPT
+C
OU
T28
OPT
R61
OPT
R12
10
R59
OPT
R66
(OPT
)
R67
(OPT
)
CIN
13O
PT
P14
P15
R57
OPT
R68
(OPT
)
U3
OP
T
VO
UT0
A1
VO
UT0
A2
VO
UT0
A3
VO
UT0
D1
ISN
S0b
-E
1
ISN
S0b
+F1
ISNS1b-G1
ISNS1b+H1
VOUT1J1
VOUT1J2
VOUT1J3
VOUT1K1
VO
UT0
B1
VO
UT0
B2
VO
UT0
B3
VO
UT0
D2
ISN
S0a
-E
2
ISN
S0a
+F2
ISNS1a-G2
ISNS1a+H2
VOUT1K2
VOUT1K3
VOUT1L1
VOUT1L2
VO
UT0
C1
VO
UT0
C2
VO
UT0
C3
VO
UT0
D3
GNDA4
GNDA6
GNDA7
GNDA8
VOUT1L3
VOUT1M1
VOUT1M2
VOUT1M3
GNDA9
GNDA10
GNDB4
GNDB5
AS
EL
G4
FSW
PH
CFG
H4
GNDB6
GNDB7
GNDB8
GNDB9
GP
IO0
E4
GP
IO1
F4
SN
UB
0A
5
GNDC4
TSN
S0b
C5
TSN
S0a
D5
ALE
RT
E5
RU
N0
F5
VO
UT0
CFG
G5
VTR
IM0C
FGH
5
TSNS1aJ5
TSNS1bK5
GNDC6
SNUB1M5
GNDC7
GNDC8
GNDC9
SD
AD
6S
CL
E6
RU
N1
F6
VO
UT1
CFG
G6
VTR
IM1C
FGH
6
VD
D25
J6
WP
K6
GNDD4
GNDE3
GNDF3
GNDF10
GNDG3
GNDG10
SY
NC
E7
GNDM9
GNDM10
SH
AR
E_C
LKH
7
VD
D33
J7
GNDG11
GNDG12
GNDL8GNDL7
GNDL9
GNDH3
CO
MP
0bD
8C
OM
P0a
E8
SGNDF7
SGNDF8
COMP1aH8
COMP1bJ8
GNDH10
GNDJ4
GNDM8
VO
SN
S0+
D9
VO
SN
S0-
E9
INTV
CC
F9
INTV
CC
G9
VOSNS1H9
VORB1J9
GNDJ10
GNDL4
GNDL5
GNDK4
SW
0B
10
DNCE11
VO
RB
0+D
10
VO
RB
0-E
10
GNDL6
GNDK7
GNDK8
GNDK9
DNCC10
SW1L10
GNDM4
VIN
H0
B12
VIN
H0
B11
VIN
H0
A12
VIN
H0
A11
DNCK10
VIN
LF1
2
GNDM6
DNCH11
VINH1H12
VINH1J11
VINH1J12
VINH1K11
VIN
H0
E12
VIN
H0
D12
VIN
H0
D11
VIN
H0
C12
VIN
H0
C11
VIN
LF1
1
GNDM7
VINH1K12
VINH1L11
VINH1L12
VINH1M11
VINH1M12
SGNDG7
SGNDG8
GNDD7
P13
R63
OPT
R62
OPT
CIN
14O
PT
P16
P12
R60
0
R70
(OPT
)
CO
UT2
3O
PT
CO
UT2
9O
PTC
OU
T30
OPT
C16
OPT
CIN
15O
PT
CO
UT2
5O
PT
P18
R64
10K
R65
(OPT
)
R58
0
13dc1989baf
DEMO MANUAL DC1989B-A
SCHEMATIC DIAGRAM5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
1210
0.035 VIA
TESTPOINTS
1210
1210
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GPI
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TB
CO
MP0
CO
MP0
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SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
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GN A
CIRC
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SUPP
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ONS;
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EMAI
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HE C
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MER'
S RE
SPON
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LITY
TO
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FY P
ROPE
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NENT
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STIT
UTIO
N AN
D PR
INTE
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ARD
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UT M
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ECT
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PERF
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TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
46
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
ASI
ZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
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CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
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FY P
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NENT
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STIT
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N AN
D PR
INTE
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T BO
ARD
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UT M
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ECT
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UIT
PERF
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NCE
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TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
46
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
ASI
ZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
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TION
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HE A
CTUA
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ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
ARD
LAYO
UT M
AY S
IGNI
FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
46
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
A
C19
OPT
R81
(OPT
)
R73
OPT
R75
OPT
+C
OU
T38
OPT
U4
OP
T
VO
UT0
A1
VO
UT0
A2
VO
UT0
A3
VO
UT0
D1
ISN
S0b
-E
1
ISN
S0b
+F1
ISNS1b-G1
ISNS1b+H1
VOUT1J1
VOUT1J2
VOUT1J3
VOUT1K1
VO
UT0
B1
VO
UT0
B2
VO
UT0
B3
VO
UT0
D2
ISN
S0a
-E
2
ISN
S0a
+F2
ISNS1a-G2
ISNS1a+H2
VOUT1K2
VOUT1K3
VOUT1L1
VOUT1L2
VO
UT0
C1
VO
UT0
C2
VO
UT0
C3
VO
UT0
D3
GNDA4
GNDA6
GNDA7
GNDA8
VOUT1L3
VOUT1M1
VOUT1M2
VOUT1M3
GNDA9
GNDA10
GNDB4
GNDB5
AS
EL
G4
FSW
PH
CFG
H4
GNDB6
GNDB7
GNDB8
GNDB9
GP
IO0
E4
GP
IO1
F4
SN
UB
0A
5
GNDC4
TSN
S0b
C5
TSN
S0a
D5
ALE
RT
E5
RU
N0
F5
VO
UT0
CFG
G5
VTR
IM0C
FGH
5
TSNS1aJ5
TSNS1bK5
GNDC6
SNUB1M5
GNDC7
GNDC8
GNDC9
SD
AD
6S
CL
E6
RU
N1
F6
VO
UT1
CFG
G6
VTR
IM1C
FGH
6
VD
D25
J6
WP
K6
GNDD4
GNDE3
GNDF3
GNDF10
GNDG3
GNDG10
SY
NC
E7
GNDM9
GNDM10
SH
AR
E_C
LKH
7
VD
D33
J7
GNDG11
GNDG12
GNDL8GNDL7
GNDL9
GNDH3
CO
MP
0bD
8C
OM
P0a
E8
SGNDF7
SGNDF8
COMP1aH8
COMP1bJ8
GNDH10
GNDJ4
GNDM8
VO
SN
S0+
D9
VO
SN
S0-
E9
INTV
CC
F9
INTV
CC
G9
VOSNS1H9
VORB1J9
GNDJ10
GNDL4
GNDL5
GNDK4
SW
0B
10
DNCE11
VO
RB
0+D
10
VO
RB
0-E
10
GNDL6
GNDK7
GNDK8
GNDK9
DNCC10
SW1L10
GNDM4
VIN
H0
B12
VIN
H0
B11
VIN
H0
A12
VIN
H0
A11
DNCK10
VIN
LF1
2
GNDM6
DNCH11
VINH1H12
VINH1J11
VINH1J12
VINH1K11
VIN
H0
E12
VIN
H0
D12
VIN
H0
D11
VIN
H0
C12
VIN
H0
C11
VIN
LF1
1
GNDM7
VINH1K12
VINH1L11
VINH1L12
VINH1M11
VINH1M12
SGNDG7
SGNDG8
GNDD7
R71
OPT
C18
OPT
CIN
16O
PT
P25
P21
R82
(OPT
)
P20
R77
OPT
CIN
17O
PT
P19
R76
OPT
P23
R74
0
R84
(OPT
)
CO
UT3
1O
PT
CO
UT3
6O
PTC
OU
T37
OPT
CIN
18O
PT
CO
UT3
3O
PT
C20
OPT
R79
(OPT
)
R72
0
P24
R78
10K
P22
CIN
19O
PT
+C
OU
T34
OPT
R83
(OPT
)
CO
UT3
5O
PT
CO
UT3
2O
PT
R12
20
C17
OPT
R80
(OPT
)
14dc1989baf
DEMO MANUAL DC1989B-A
SCHEMATIC DIAGRAM5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
µMo
dule
REGU
LATO
R W
ITH
DIGI
TAL
POW
ER M
ANAG
EMEN
T
GPI
O0
GPI
O1
ALER
TB
J1, MALE, CONN HEADER 14POS 2MM R/A GOLD, Molex Connector Corp. 87760-1416
J2, FEMALE, CONN RECEPT 2MM DUAL R/A 14POS, Sullins Conn. NPPN072FJFN-RC
TO D
C16
13A
PSM STACKING CONNECTORS:
OPTIONAL CIRCUIT FOR PROGRAMMING
WITHOUT VIN
1206
TO D
C20
86A
ALL
PA
RTS
ON
TH
IS P
AG
E A
RE
FO
R D
EM
O O
NLY
, NO
T N
EE
DE
D IN
CU
STO
ME
R D
ES
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AUXV
CC
EEW
P
EESD
A
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L
AUX3
V4
3V3
3V3
3V3
3V3
VIN3V
3VD
D33
VIN
3V3
GPI
O0B
GPI
O1B
ALER
TB
VDD
33
ALER
TBSD
ASC
L
RU
N0
RU
N1
GPI
O1B
GPI
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C
SHAR
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LK
VDD
33
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
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Use
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SIST
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CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
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linea
r.com 1
Thur
sday
, Marc
h 17,
2016
56
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
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M46
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89B-
ASI
ZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
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EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
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TION
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NENT
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PERF
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TY. C
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CHNO
LOGY
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TION
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ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
56
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
IRCU
IT 19
89B-
ASI
ZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
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UIT
THAT
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SUPP
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S RE
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CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
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OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
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H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Marc
h 17,
2016
56
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M46
76AE
YDE
MO C
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D
15dc1989baf
DEMO MANUAL DC1989B-A
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 representa-tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
SCHEMATIC DIAGRAM
Figu
re 7
. Circ
uit S
chem
atic
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
ALL
PA
RTS
ON
TH
IS P
AG
E A
RE
FO
R D
EM
O O
NLY
, NO
T N
EE
DE
D IN
CU
STO
ME
R D
ES
IGN
OP
T20
1020
10O
PT
DYN
AMIC
LO
AD C
IRC
UIT
BLEEDER LOADS
µMo
dule
REGU
LATO
R W
ITH
DIGI
TAL
POW
ER M
ANAG
EMEN
T
ON
OFF
70H
z, 3
% D
uty
Cyc
leIN
TE
XT
1% 1%
0805
IOU
TTS
T
VO
UT0
PU
LSE
BIA
S
VO
UT0
VO
UT1
VIN
VO
UT0
+5V
+5V
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
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TION
IN T
HE A
CTUA
LAP
PLIC
ATIO
N. C
OMPO
NENT
SUB
STIT
UTIO
N AN
D PR
INTE
DCI
RCUI
T BO
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LAYO
UT M
AY S
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FICA
NTLY
AFF
ECT
CIRC
UIT
PERF
ORMA
NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Mar
ch 17
, 201
66
6
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M467
6AEY
DEMO
CIR
CUIT
1989
B-A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
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IN T
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NENT
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N AN
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CHNO
LOGY
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S EN
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G FO
R AS
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.
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CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Mar
ch 17
, 201
66
6
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M467
6AEY
DEMO
CIR
CUIT
1989
B-A
SIZE
DATE
:
IC N
O.RE
V.
SHEE
TOF
TITL
E:
APPR
OVAL
S
PCB
DES.
APP
ENG.
TEC
HN
OLO
GY
Fax:
(408
)434
-050
7
Milp
itas,
CA 95
035
Phon
e: (4
08)4
32-1
900
1630
McC
arth
y Blvd
.
LTC
Conf
iden
tial-F
or C
usto
mer
Use
Onl
y
CUST
OMER
NOT
ICE
LINE
AR T
ECHN
OLOG
Y HA
S MA
DE A
BES
T EF
FORT
TO
DESI
GN A
CIRC
UIT
THAT
MEE
TS C
USTO
MER-
SUPP
LIED
SPE
CIFI
CATI
ONS;
HOW
EVER
, IT R
EMAI
NS T
HE C
USTO
MER'
S RE
SPON
SIBI
LITY
TO
VERI
FY P
ROPE
R AN
D RE
LIAB
LE O
PERA
TION
IN T
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LAP
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ATIO
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NENT
SUB
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N AN
D PR
INTE
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T BO
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FICA
NTLY
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ECT
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UIT
PERF
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NCE
OR R
ELIA
BILI
TY. C
ONTA
CT L
INEA
RTE
CHNO
LOGY
APP
LICA
TION
S EN
GINE
ERIN
G FO
R AS
SIST
ANCE
.
THIS
CIR
CUIT
IS P
ROPR
IETA
RY T
O LI
NEAR
TEC
HNOL
OGY
AND
SCHE
MAT
IC
SUPP
LIED
FOR
USE
WIT
H LI
NEAR
TEC
HNOL
OGY
PART
S.SC
ALE
= NO
NE
www.
linea
r.com 1
Thur
sday
, Mar
ch 17
, 201
66
6
HIGH
EFF
ICIE
NCY,
POL
Y-PH
ASE,
DC/
DC S
TEP-
DOW
N
HZ JIAN
L.
BLT
M467
6AEY
DEMO
CIR
CUIT
1989
B-A
R11
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72
16dc1989baf
DEMO MANUAL DC1989B-A
Linear Technology Corporation1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2016
LT 0916 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC applica-tion engineer.
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Milpitas, CA 95035
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