Post on 02-Mar-2021
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Output voltage compensation DC/DC converter for USBMonolithic IC MM3630BV
Outline
Output voltage compensation for USB power supply. Support it that the compensation the output voltage to descend by cable resistance and satisfies a USB standard. In addition, its feature of synchronous rectifi cation reduces both the number of components used in the corresponding device and the mounting area. To prevent interfere with the AM-band, it is equipped with the variable function that operates according to an external resistor and the external synchronization for the switching frequency.
Package
TSOP-20E
Applications
1. Car Audio2. Car Navigation3. Connector Box
Features
1. Absolute maximum rating : 40V2. Input voltage range : 4.5 to 33V3. Output voltage range : 3 to 7V4. Referance voltage : 0.8V ±1.5%5. Output current : 2.5A6. Switching frequency range : 200kHz to 1000kHz. Ext. SYNC or Set by resistor7. Adjustable over current protection.8. Package : TSOP-20E
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Block Diagram
Pin Assignment
PGND
SW
BS
DRIVERL
OSC
FB ERROR AMP
PWM COMP
COMP
TSD
UVLO
CE
VREF0.8V typ.
High-side
Low-side
VIN
4.5~33V
CurrentLimit
VDD
CSAMP
+-
+
-
+
INTENALREGULATOR
VDD15V typ.
EN
SLOPE_COMP
SD
PowerSupply
OFF
ON
VOUT
VOUT
SD
SWITCHCONTROL
Logic
SYNC
ProtectionLogic
EN
CLK
DRIVERH
+
-
+
-
Vout compAMP
SD
SOFTSTART
SENS-
CLOCKSELECT
Rsense
SENS+
SS
RT
Currnt LimitCOMP
OCP_OUT
-
+
ROCP
P_GOOD
FB
OCP_OUT
VDD1
AGND
PLLFILTER
OVP / LVPFB
VINOVP_IN
OCP_IN
VDD2
Timer Latch Off Circuit
100uA Typ.
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
TSOP-20ETop View
SW
SW
PGND
PGND
BS
VDD1
AGND
SENS+
SENS-
ROCP
CE
VIN
VIN
FILTER
SYNC
RT
P_GOOD
SS
COMP
FB
TPAD
21
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Pin Description
Pin No. Pin name Pin description
1, 2 SW Inductor connection pin. Output pin to inductor.
3, 4 PGND Ground pin.
5 BSBootstrap capacitor connection pin.The bootstrap capacitor 0.1µF is necessary between BS to SW to drive the high side switch.
6 VDD1 Internal linear regulator output pin.
7 AGND Ground pin.
8 SENS+
Output voltage correction amplifi er input plus pin.Corrects an output voltage drop for output impedance by adjusting an amplifi er gain by resistance connected with. In not using RSENSE resistance (short circuit use), please connect with VOUT together with a SENS- pin.
9 SENS-
Output voltage correction amplifi er input minus pin.Corrects an output voltage drop for output impedance by adjusting an amplifi er gain by resistance connected with. In not using RSENSE resistance (short circuit use), please connect with VOUT together with a SENS+ pin.
10 ROCPCurrent Limit detection value setting pin. An CurrentLimit detection level is decided by resistance linked to a Rocp pin, and output voltage compensation resistance. In not using a ROCP pin, please connect to GND.
11 FBOutput voltage feedback pin.Output voltage is set by adjusting the resistor between VOUT, FB and GND.
12 COMPPhase compensation pin.Error amplifi er output pin. Connect to phase compensation componets to thin pin.
13 SSSoft-start time adjustable pin.Soft-start time can be set up by adjusting an external capacitor.
14 P_GOODReset output pin.Open drain reset output pin. L signal is outputted when the abnormal operation is detected. In not using a P_GOOD pin, please connect to GND.
15 RTExternal frequency setting pin.Oscillation frequency can be set up by adjusting an external resistance.
16 FILTERThe phase-locked loop's low pass fi lter pin.In not using an external synchronization function, please connect to GND.
17 SYNCExternal synchro pin.The switching frequency is synchronized with sync pin input pulse signal.In not using an external synchronization function, please connect to GND.
18, 19 VINPower supply pin.Input power supply voltage 4.5-33V. Input capacitor must be used to the ceramic capacitor.
20 CEChip enable pin.Pull above 2.0V to enable, pull below 0.6V to disable. Please avoid use in the state that is fl oating.
21 TPADThermal padThermal pad must be connected to ground to use the best electrical characteristics.
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Absolute Maximum Ratings
Recommended Operating Conditions
Item Symbol Ratings UnitsOperating Ambient Temperature TOPR -40~+85 °C
Operating Voltage1 VOP1 4.5~33 VOutput Voltage Setting Range VOUT 3~7 V
Item Symbol Ratings UnitsVIN Supply Voltage VINMAX −0.3~+40 V
SW Pin Voltage VSWMAX −0.3~VIN+0.3 VBS Pin Voltage VBSMAX VSW−0.3~VSW+5.5 VFB Pin Voltage VFBMAX −0.3~+5.5 VCE Pin Voltage VCEMAX −0.3~+40 VSS Pin Voltage VSSMAX −0.3~+5.5 V
COMP Pin Voltage VCOMPMAX −0.3~+5.5 VVDD1 Pin Voltage VVDDMAX −0.3~+5.5 VSYNC Pin Voltage VSYNCMAX −0.3~+5.5 V
RT Pin Voltage VRTMAX −0.3~+5.5 VFILTER Pin Voltage VFILTERMAX −0.3~+5.5 VROCP Pin Voltage VROCPMAX −0.3~+12 VSENS+ Pin Voltage VSENS+MAX −0.3~+12 VSENS- Pin Voltage VSENS-MAX −0.3~+12 V
P_GOOD Pin Voltage VPGOODMAX −0.3~+5.5 VAGND-PGND Pin Voltage VGNDMAX −0.3~+0.3 V
Storage Temperature Tstg −55~+150 °CPower dissipation (Note1) Pd 3.7 W
Note1 : A GND pattern is connected with a radiating fi n. Board size:50×50×1.6t mm. It is a double-sided GND pattern about 90% of a copper foil.
(Except where noted otherwise Ta=25°C)
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Electrical Characteristics (Except where noted otherwise Ta=25°C, VIN=12V, VCE=3V)
Note2 : Guaranteed by design, not tested.
Item Symbol Measurement conditions Min. Typ. Max. Units
Operating Voltage 2 VOP2VOUT=5V, IOUT=2.5AR5=160k , R4=0
7 18 V
Supply Current IS1VCE=3V, VFB=0.9V
No swithing1.5 3 mA
Shutdown Current IS2 VCE=0V, VIN=33V 0.01 1 µA
Feedback Voltage VFB VCOMP=VFB, VSENS+-VSENS-=0V 0.788 0.800 0.812 V
Output Voltage Compensation Coeffi cient KC VSENS+-VSENS-=0.05V, 0.3V 0.392 0.412 0.432
Error Amplifi er Transconductance GEA ICOMP=±10µA, VCOMP=1V 100 µA/V
High-side Switch On-resistance (Note2) RONH VGS=4.5V 120 m
Low-side Switch On-resistance (Note2) RONL VGS=4.5V 120 m
High-side Switch Leakage Current ILEAKH VCE=0V, VSW=0V 0.01 1 µA
Low-side Switch Leakage Current ILEAKL VCE=0V, VBS=12V, VSW=12V 0.01 1 µA
Low Output Voltage Protection VLVP VFB=high to low, VCOMP=1V 0.3 0.4 0.5 V
Over Output Voltage Protection VOVP VFB=low to high, VCOMP=1V 110 120 130 %
Latch Delay Time tLATCH 0.7 1.0 1.3 ms
Oscillation Frequency fSW VFB=0.7V, R5=160k , SYNC=open 450 500 550 kHz
Oscillation Frequency Range fRANGE 200 1000 kHz
Minimum Off Time tOFFMIN VFB=0.7V 240 ns
Minimum On Time tONMIN 270 ns
UVLO Wake up Voltage VUVLO VDD1=low to high 4.0 4.2 4.5 V
UVLO Hysteresis Voltage VUVLO VDD1=high to low 0.2 V
Over Input Voltage Protection VOVPIN VIN=low to high 33.5 36.5 39.5 V
OVLO Hysteresis Voltage VOVPIN VIN=high to low 0.9 V
Soft Start Time TSSCSS=15000pF, VCE>VCET to time that VOUT is
up to reach 95% of the normal value.6 ms
CE Pin Threshold Voltage VCET 0.6 2 V
Thermal Shutdown (Note2) TSD 170 °C
Thermal Shutdown Hystersis (Note2) TSD 30 °C
ROCP Pin Input Current IROCP VROCP=5V 95 100 105 µA
Output Current Limit Offset Voltage
VOFFSET VSENS- - VROCP -5.0 +5.0 mV
SYNC High Voltage VSYNCH VSYNC=0V to 5V 2.0 V
SYNC Low Voltage VSYNCL VSYNC=5V to 0V 0.4 V
SYNC Input Current ISYNC VSYNC=3V 0.06 0.12 0.24 mA
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
TEST CIRCUIT2
TEST CIRCUIT1
Measuring Circuit
VIN
SYNC
COMP
AGND
SENS+
FB
SW
10μF
10μH
VIN
MM3630BV
CE
SENS-
BS0.1μF
PGND
P_GOOD160k15nF
SS
RT
VDD1
ROCP
FILTER
1μFVCE12k
1.8nFAIIN
0.1
3k 12.6k
2.4k
2.2μF100k
20μF 0.2μF
V VOUT_RLIOUT
RCABLE=0.25
Cable resistance
V VOUT
VIN
SYNC
COMP
AGND
SENS+
FB
SW
10μFVIN
MM3630BV
CE
SENS-
BS0.1μF
PGND
P_GOOD160k15nF
SS
RT
VDD1
ROCP
FILTER
1μFVCE
AIIN
2.2μF100k
VCOMP
A
ICOMP
VFB VROCP
A
IROCP
VSW
A
ISW
VSENS+ VSENS-
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Timing Chart(1) Start-up/ Shut-down
CE
VOUT
VIN
SS VSS 0.8V typ.
VCET
VDD1VUVLO 4.2V typ.
VOUT ×0.95 typ.
4.0V typ.
Low LEVEL(abnomal)
Soft starttime TSSP_GOOD
(Pull-up)
VCET
VIN/CE
VOUT
Soft starttime TSS
Latch delaytime TLATCH
1ms typ.
FB
Shutdown
Re-start
Output decreaseOutput decrease
VFB 0.8V typ.
VLVP 0.4V typ.
P_GOOD(Pull-up)
Low LEVEL(abnomal)
Soft starttime TSS
(2) Low output voltage protection
When LVP are detected exceeding latch delay time TLATCH, IC is shutdown, P_GOOD is L-Output.The IC is re-start by turning on VIN/CE pin.
Start-up conditon is VCE>VCET and VDD1>VUVLO.Shut-down conditon is VCE<VCET and VDD1<VUVLO.Soft start time VSS is from VCE>VCET to time that VOUT is up to reach 95% of the normal value.
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
VIN/CE
VOUT
FB
VOVP
VFB*120% typ.
Shutdown
Output increase Output increase
VFB 0.8V typ.
Re-start
P_GOOD(Pull-up)
Low LEVEL(abnomal)
Latch delaytime TLATCH
1ms typ.
Soft starttime TSS
Soft starttime TSS
(3) Over output voltage protection
When OVP are detected exceeding latch delay time TLATCH, IC is shutdown, P_GOOD is L-Output.The IC is re-start by turning on VIN/CE pin.
VIN/CE
VOUT
T j
VUVLO VUVLO
(4) Thermal shutdown function
When the junction temperature (Tj) rises above 170 °C, VDD1 stops, and the IC shuts it down.When the junction temperature (Tj) drops below 130 °C, IC will restart.
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
VIN/CE
VOUT
IOUT Output currentincrease
Output currentincrease
Shutdown
Re-start
Clamp byInternal ILIM
External ILIM
Clamp Time <Latch delay timeTLATCH 1ms typ.
Latch delaytime TLATCH
1ms typ.
Soft starttime TSS
Soft starttime TSS
P_GOOD(Pull-up)
Low LEVEL(abnomal)
VIN/CE
VOUT
FB
OVP_IN 0.9V typ.
Shutdown
VFB 0.8V typ.
Re-start
P_GOOD(Pull-up)
Low LEVEL(abnomal)
Soft starttime TSS
Soft starttime TSS
VOVP_IN
(5) Current limit function
When Current limit are detected exceeding latch delay time TLATCH, IC is shutdown, P_GOOD is L-Output.The IC is re-start by turning on VIN/CE pin.
(6) Over input voltage protection
When OVP_IN are detected, IC is shutdown, P_GOOD is L-Output.When VIN decrease under OVP_IN- OVP_IN, the IC is re-start.
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Application Circuit
· Notice
The output voltage is decided depending on the input voltage, Minimum on time, Maximum duty cycle. Please decide the output condition in consideration of the above-mentioned characteristic.
There is a possibility that operation becomes unstable when the current rating of the coil is exceeded. Please enlarge the current rating of the coil more than the output current.
VIN
SYNC
COMP
AGND
SENS+
FB
SW
C1=10μF
L
ICMM3630BV
CE
SENS-
BSC4=0.1μF
PGND
P_GOODR5C5=
15nF
SS
RT
VDD1
ROCP
FILTER
C7=1μF
R3
C3
R4
R6=3k R1
R2
C6=2.2μF
R7=100k
C2C8=0.22μF
VIN
GND
Enable
CLK
VOUT
Recommended external parts value.
VOUT[V] L [µH] C2 [µF] R1 [k ] R2 [k ] C3 [pF] R3 [k ] R5 [k ]5.0 10 20 12.6 2.4 1800 12 160
C1-C8 Ceramic capacitor
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Effi ciency
Load Regulation
Characteristics (Except where noted otherwise VIN=12V, VCE=3V, Ta=25°C)
0
10
20
30
40
50
60
70
80
90
100
0.0 0.5 1.0 1.5 2.0 2.5
Effi
cien
cy [%
]
I OUT [A]
fSW=500kHzR4=0.1RCABLE=open
VIN=7VVIN=12VVIN=18VVIN=33V
fSW=1MHzR4=0.1RCABLE=open
VIN=7VVIN=12VVIN=18V
0
10
20
30
40
50
60
70
80
90
100
0.0 0.5 1.0 1.5 2.0 2.5
Effi
cien
cy [%
]
I OUT [A]
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
0.0 0.5 1.0 1.5 2.0 2.5
VO
UT
[V]
I OUT [A]
VIN=7VVIN=12VVIN=18VVIN=33V
fSW=500kHzR4=0.1RCABLE=0.25
4.7
4.8
4.9
5.0
5.1
5.2
5.3
0.0 0.5 1.0 1.5 2.0 2.5
VO
UT
_RL
[V]
I OUT [A]
fSW=500kHzR4=0.1RCABLE=0.25
VIN=7VVIN=12VVIN=18VVIN=33V
4.7
4.8
4.9
5.0
5.1
5.2
5.3
0.0 0.5 1.0 1.5 2.0 2.5
VO
UT
_RL
[V]
I OUT [A]
VIN=7V
VIN=12VVIN=18V
fSW=1MHzR4=0.1RCABLE=0.25
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
0.0 0.5 1.0 1.5 2.0 2.5
VO
UT
[V]
I OUT [A]
fSW=1MHzR4=0.1RCABLE=0.25
VIN=12VVIN=18V
VIN=7V
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Line Regulation
Load Transient Response
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
0 10 20 30 40
VO
UT
[V]
VIN [V]
IOUT=2.5A
IOUT=0A
fSW=500kHzR4=0.1RCABLE
4.7
4.8
4.9
5.0
5.1
5.2
5.3
0 10 20 30 40
VO
UT
_RL
[V]
VIN [V]
IOUT=2.5A
IOUT=0A
fSW=500kHzR4=0.1RCABLE
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
0 10 20 30 40
VO
UT
[V]
VIN [V]
fSW=1MHzR4=0.1RCABLE
IOUT=2.5A
IOUT=0A
VO
UT
_RL
[V]
fSW=1MHzR4=0.1RCABLE
4.7
4.8
4.9
5.0
5.1
5.2
5.3
0 10 20 30 40 VIN [V]
IOUT=0A
IOUT=2.5A
IOUT
100µs/div
VIN=12VfSW=1MHzR4=0.1RCABLE
VOUT
0.5V/div
IOUT=0A to 1.5A0.1A/µs1A/div
VOUT_RL
0.5V/div
IOUT=0A to 1.5A0.1A/ s1A/div
VOUT
0.5V/div
VOUT_RL
0.5V/div
IOUT
100 s/div
VIN=12VfSW=500kHzR4=0.1RCABLE
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Line Regulation Operation Waveform
Start-up Shutdown
Low-side switch on-resistance vs Temperature Oscillation Frequency vs R5
1ms/div
VCE
10V/div
VSW
10V/divVOUT
2V/div
IIN0.5A/div
IOUT=1AfSW=500kHzR4=0.1RCABLE=open‹‹ M a i n : 1 M ›› ‹‹ Ma i n : 1M ››
200μs/div
VCE
10V/div
VOUT
2V/div
VSW
10V/div
IIN0.5A/div
IOUT=1AfSW=500kHzR4=0.1RCABLE=open
0.00
0.05
0.10
0.15
0.20
-40 -20 0 20 40 60 80 100
RO
NL
[]
Ta [°C]
ISW=0.1A
0
100
200
300
400
500
600
700
800
900
1000
1100
1200
10 100 1000
f SW
[kH
z]
R5 [k ]
IOUT
VIN=7V to 18V55mV/μs10V/div
VOUT_RL
0.2V/div
200 s/div
IOUT=1AfSW=500kHzR4=0.1RCABLE
VOUT
0.2V/div
IOUTIOUT
1A/div
VSW
10V/div
VIN
0.1V/div
VOUT
0.1V/div
IOUT=1.5AfSW=500kHzR4=0.1RCABLE=open
iv
MITSUMI Output voltage compensation DC/DC converter for USB MM3630BV
Feedback Voltage vs Temperature Oscillation Frequency vs Temperature
Minimum Off time vs Temperature Minimum On time vs Temperature
ROCP Pin Input Current vs Temperature
0.788
0.792
0.796
0.800
0.804
0.808
0.812
-40 -20 0 20 40 60 80 100
VF
B [V
]
Ta [°C]
450
460
470
480
490
500
510
520
530
540
550
-40 -20 0 20 40 60 80 100
f SW
[kH
z]
Ta [°C]
R5=160k
0
50
100
150
200
250
-40 -20 0 20 40 60 80 100
TO
FF
MIN
[n
s]
Ta [°C]
TO
nMIN
[n
s]
0
50
100
150
200
250
300
-40 -20 0 20 40 60 80 100Ta [°C]
95
96
97
98
99
100
101
102
103
104
105
-40 -20 0 20 40 60 80 100
I RO
CP
[A
]
Ta [°C]
VROCP=5V