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MITSUMI
Output voltage compensation DC/DC converter for USB MM3630BR
Output voltage compensation DC/DC converter for USB
Monolithic IC MM3630BR
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
rectification 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.
Features
1. Absolute maximum rating : 40V
2. Input voltage range :
4.5 to 33V
3. Output voltage range :
3 to 7V
4. Referance voltage :
0.8V ±1.5%
5. Output current :
1.5A
6. Switching frequency range : 200kHz to 1000kHz.
Ext. SYNC or Set by resistor
7. Adjustable over current protection.
8. Package :
SQFN-24
Package
SQFN-24
Applications
1. Car Audio
2. Car Navigation
3. Connector Box

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MITSUMI
Block Diagram
Output voltage compensation DC/DC converter for USB MM3630BR
ON
OFF CE
VDD1
RT
SYNC
FILTER
VOUT
FB
SS
COMP
INTERNAL
REGULATOR
VDD2
EN
OSC
CLK CLOCK
SELECT
PLL
VDD1
5V typ.
CLMT_IN
SLOPE_COMP
ё
SD
+
-
CSAMP
DRIVER
H
High-side
Pї
SOFT
START
SD
FB
-
+
+
VREF
0.8V typ.
ERROR AMP
Vout comp
AMP
Currnt Limit
AMP
+
-
CLMT_OUT
-
+
100uA Typ.
ROCP SENS-
+
-
PWM COMP
SWITCH
CONTROL
Logic
VDD
DRIVER
L
EN
UVLO
TSD
VIN
OVP_IN
CLMT_OUT
Current
Limit
FB
OVP / LVP
Timer Latch Off Circuit
SENS+
Protection
Logic
Low-side
Pї
SD
VIN
Power
Supply
4.5 33V
BS
SW
PGND
AGND
P_GOOD
Rsense
VOUT
Pin Assignment
VIN VIN VIN SYNC FILTER RT
18 17 16 15 14 13
CE 19
12 P_GOOD
N.C. 20
11 SS
N.C. 21
SW 22
25
TPAD
10 COMP
9 FB
SW 23
8 ROCP
N.C. 24
7 SENS-
123456
PGND PGND BS VDD1 AGND SENS+

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MITSUMI
Output voltage compensation DC/DC converter for USB MM3630BR
Pin Description
Pin No.
1, 2
3
4
5
6
Pin name
PGND Ground pin.
Pin description
Bootstrap capacitor connection pin.
BS
The bootstrap capacitor 0.1µF is necessary between BS to SW to drive the high side switch.
VDD1 Internal linear regulator output pin.
AGND Ground pin.
SENS +
Output voltage correction amplifier input plus pin.
Corrects an output voltage drop for output impedance by adjusting an amplifier gain by
resistance connected with. In not using RSENSE resistance (short circuit use), please
connect with VOUT together with a SENS- pin.
Output voltage correction amplifier input minus pin.
7 SENS- Corrects an output voltage drop for output impedance by adjusting an amplifier gain by
resistance connected with. In not using RSENSE resistance (short circuit use), please
connect with VOUT together with a SENS+ pin.
Current Limit detection value setting pin. An CurrentLimit detection level is decided
8 ROCP by resistance linked to a Rocp pin, and output voltage compensation resistance.
In not using a ROCP pin, please connect to GND.
Output voltage feedback pin.
9 FB
Output voltage is set by adjusting the resistor between VOUT, FB and GND.
Phase compensation pin.
10 COMP
Error amplifier output pin. Connect to phase compensation componets to thin pin.
11 SS Soft-start time adjustable pin.
Reset output pin.
12 P_GOOD Open drain reset output pin. L signal is outputted when the abnormal operation is
detected.
13 RT External frequency setting pin.
The phase-locked loop's low pass filter pin.
14 FILTER
In not using an external synchronization function, please connect to GND.
External synchro pin.
15 SYNC The switching frequency is synchronized with sync pin input pulse signal.
In not using an external synchronization function, please connect to GND.
16, 17, 18 VIN
Power supply pin.
Input power supply voltage 4.5-33V. Input capacitor must be used to the ceramic capacitor.
19
20, 21, 24
22, 23
25
CE
N.C.
SW
TPAD
Chip enable pin.
Pull above 2.0V to enable, pull below 0.6V to disable. Please avoid use in the state that is floating.
No connect pin.
Inductor connection pin. Output pin to inductor.
Thermal pad
Thermal pad must be connected to ground to use the best electrical characteristics.

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MITSUMI
Output voltage compensation DC/DC converter for USB MM3630BR
Absolute Maximum Ratings (Except where noted otherwise Ta=25°C)
Item
VIN Supply Voltage
SW Pin Voltage
BS Pin Voltage
FB Pin Voltage
CE Pin Voltage
SS Pin Voltage
COMP Pin Voltage
VDD1 Pin Voltage
SYNC Pin Voltage
RT Pin Voltage
FILTER Pin Voltage
ROCP Pin Voltage
SENS+ Pin Voltage
SENS- Pin Voltage
P_GOOD Pin Voltage
AGND-PGND Pin Voltage
Storage Temperature
Power dissipation (Note1)
Symbol
VINMAX
VSWMAX
VBSMAX
VFBMAX
VCEMAX
VSSMAX
VCOMPMAX
VVDDMAX
VSYNCMAX
VRTMAX
VFILTERMAX
VROCPMAX
VSENS+MAX
VSENS-MAX
VPGOODMAX
VGNDMAX
Tstg
Pd
Note1 : Using JEDEC standard 4layers board.
Ratings
− 0.3~ +40
−0.3~VIN+0.3
VSW−0.3~VSW+5.5
− 0.3~ +5.5
− 0.3~ +40
− 0.3~ +5.5
− 0.3~ +5.5
− 0.3~ +5.5
− 0.3~ +5.5
− 0.3~ +5.5
− 0.3~ +5.5
− 0.3~ +12
− 0.3~ +12
− 0.3~ +12
− 0.3~ +5.5
− 0.3~ +0.3
−55~ +150
2.37
Units
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
°C
W
Recommended Operating Conditions
Item
Operating Ambient Temperature
Operating Voltage1
Output Voltage Setting Range
Symbol
TOPR
VOP1
VOUT
Ratings
-40~ +85
4.5~33
3~7
Units
°C
V
V

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MITSUMI
Output voltage compensation DC/DC converter for USB MM3630BR
Electrical Characteristics (Except where noted otherwise Ta=25°C, VIN=12V, VCE=3V)
Item
Symbol
Measurement conditions
Min. Typ. Max. Units
Operating Voltage 2
VOP2
VOUT=5V, IOUT=2.5A
RT=160k , Rsense=0
7 18 V
Supply Current
IS1
VCE=3V, VFB=0.9V
No swithing
1.5 3 mA
Shutdown Current
IS2
VCE=0V, VIN=33V
0.01 1 µA
Feedback Voltage
VFB
VCOMP=VFB, IOUT=0A
0.788 0.800 0.812 V
Output Voltage Compensation Coefficient KC
VSENS+-VSENS-=0.05V, 0.3V
0.392 0.412 0.432
Error Amplifier 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, RT=160k , SYNC=open
450 500 550 kHz
Oscillation Frequency Range fRANGE
200 1000 kHz
Minimum Off Time
tMIN
VFB=0.7V
240 ns
Minimum On Time
tONMIN
240 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
TSS
CSS=15000pF, VCE>VCET to time that VOUT is
up to reach 95% of the normal value.
6
ms
CE Pin Threshold Voltage
Thermal Shutdown (Note2)
Thermal Shutdown Hystersis (Note2)
ROCP Pin Input Current
VCET
TSD
TSD
IROCP
VROCP= 5 V
0.6 2 V
170 °C
30 °C
95 100 105 µA
Output Current Limit Offset
VOFFSET
Voltage
VSENS- - VROCP
-5.0 +5.0 mV
SYNC High Voltage
SYNC Low Voltage
SYNC Input Current
VSYNCH
VSYNCL
ISYNC
VSYNC= 0V to 5V
VSYNC=5V to 0V
VSYNC= 3V
2.0 V
0.4 V
0.06 0.12 0.24 mA
Note2 : Guaranteed by design, not tested.