MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Output voltage compensation DC/DC converter for USB
Monolithic IC MM3630XV
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 : 2.5A
6. Switching frequency range : 200kHz to 1000kHz.
Ext. SYNC or Set by resistor
7. Adjustable over current protection.
8. Package : TSOP-20E
Package
TSOP-20E
Applications
1. Car Audio
2. Car Navigation
3.Connector Box
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Block Diagram
VIN
ON
OFF
CE
INTENAL
REGULATOR
VDD1
4.5～33V
VDD1
5V typ.
VDD2
EN
RT
OSC
CLK
VOUT
FILTER
SS
CSAMP
FB
SOFT
START
+
+
Σ
SW
SWITCH
CONTROL
Logic
-
ERROR AMP
High-side
120m Ω
DRIVER
H
SD
+
VDD
PWM COMP
VREF
0.8V typ.
Low-side
120m Ω
DRIVER
L
SD
Vout comp
AMP
COMP
TSD
100uA Typ.
+
AGND
UVLO
VIN
-
PGND
EN
+
-
Currnt Limit
COMP
OCP_OUT
BS
SLOPE_COMP
PLL
FB
+
-
OCP_IN
CLOCK
SELECT
SYNC
OCP_OUT
FB
OVP_IN
Current
Limit
Protection
Logic
SD
P_GOOD
OVP / LVP
Timer Latch Off Circuit
ROCP
Power
Supply
SENS-
SENS+
Pin Assignment
TSOP-20E
Top View
SW
1
20
CE
SW
2
19
VIN
PGND
3
18
VIN
PGND
4
17
SYNC
BS
5
16
FILTER
VDD1
6
15
RT
AGND
7
14
P_GOOD
SENS+
8
13
SS
SENS-
9
12
COMP
ROCP
10
11
FB
21
TPAD
Rsense
VOUT
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Pin Description
Pin No.
Pin name
1, 2
SW
3, 4
PGND
5
BS
6
VDD1
Internal linear regulator output pin.
7
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.
SENS-
Output voltage correction amplifier input minus 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.
10
ROCP
Current 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
FB
12
COMP
13
SS
8
9
14
P_GOOD
15
RT
16
FILTER
Pin description
Inductor connection pin. Output pin to inductor.
Ground pin.
Bootstrap capacitor connection pin.
The bootstrap capacitor 0.1μF is necessary between BS to SW to drive the high side switch.
Output voltage feedback pin.
Output voltage is set by adjusting the resistor between VOUT, FB and GND.
Phase compensation pin.
Error amplifier output pin. Connect to phase compensation componets to thin pin.
Soft-start time adjustable pin.
Soft-start time can be set up by adjusting an external capacitor.
Reset 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.
External frequency setting pin.
Oscillation frequency can be set up by adjusting an external resistance.
The phase-locked loop's low pass filter pin.
In not using an external synchronization function, please connect to GND.
External synchro pin.
17
SYNC
The switching frequency is synchronized with sync pin input pulse signal.
In not using an external synchronization function, please connect to GND.
18, 19
VIN
20
CE
21
TPAD
Power supply pin.
Input power supply voltage 4.5-33V. Input capacitor must be used to the ceramic capacitor.
Chip enable pin.
Pull above 2.0V to enable, pull below 0.6V to disable. Please avoid use in the state that is floating.
Thermal pad
Thermal pad must be connected to ground to use the best electrical characteristics.
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Absolute Maximum Ratings
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)
(Except where noted otherwise Ta=25°C)
Symbol
VINMAX
VSWMAX
VBSMAX
VFBMAX
VCEMAX
VSSMAX
VCOMPMAX
VVDDMAX
VSYNCMAX
VRTMAX
VFILTERMAX
VROCPMAX
VSENS+MAX
VSENS-MAX
VPGOODMAX
VGNDMAX
Tstg
Pd
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
3.7
Units
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
°C
W
Note1 : A GND pattern is connected with a radiating fin. Board size:50×50×1.6t mm.
It is a double-sided GND pattern about 90% of a copper foil.
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
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Electrical Characteristics
(Except where noted otherwise Ta=25°C, VIN=12V, VCE=3V)
Item
Symbol
Measurement conditions
Operating Voltage 2
VOP2
VOUT=5V, IOUT=2.5A
R5=160k , R4=0
Supply Current
IS1
VCE=3V, VFB=0.9V
No swithing
Shutdown Current
IS2
Feedback Voltage
Min. Typ. Max. Units
18
V
1.5
3
mA
VCE=0V, VIN=33V
0.01
1
μA
VFB
VCOMP=VFB, VSENS+-VSENS-=0V
0.788 0.800 0.812
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
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
450
500
550
kHz
Oscillation Frequency Range
fRANGE
1000
kHz
Minimum Off Time
tOFFMIN
240
ns
Minimum On Time
tONMIN
270
ns
UVLO Wake up Voltage
VUVLO
4.5
V
UVLO Hysteresis Voltage
Over Input Voltage Protection
OVLO Hysteresis Voltage
VUVLO
VOVPIN
VOVPIN
Soft Start Time
TSS
CE Pin Threshold Voltage
VCET
Thermal Shutdown (Note2)
TSD
Thermal Shutdown Hystersis (Note2)
VFB=0.7V, R5=160k , SYNC=open
7
100
200
VFB=0.7V
VDD1=low to high
4.0
VDD1=high to low
VIN=low to high
μA/V
0.2
33.5
36.5
V
39.5
V
VIN=high to low
0.9
V
CSS=15000pF, VCE>VCET to time that VOUT is
up to reach 95% of the normal value.
6
ms
0.6
TSD
ROCP Pin Input Current
IROCP
VROCP=5V
95
Output Current Limit Offset
Voltage
VOFFSET
VSENS- - VROCP
-5.0
SYNC High Voltage
VSYNCH
VSYNC= 0V to 5V
2.0
SYNC Low Voltage
VSYNCL
VSYNC=5V to 0V
SYNC Input Current
ISYNC
VSYNC=3V
Note2 : Guaranteed by design, not tested.
4.2
V
0.06
2
V
170
°C
30
°C
100
105
μA
+5.0
mV
V
0.12
0.4
V
0.24
mA
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Measuring Circuit
TEST CIRCUIT1
MM3630
VIN
SENS-
CE
SENS+
SYNC
BS
COMP
SW
A
VIN
10µF
VCE
FILTER
12kΩ
15nF
160kΩ
0.1Ω
3kΩ
1µF
VDD1
V VOUT
2.4kΩ
100kΩ
2.2µF
P_GOOD
AGND
RCABLE=0.25Ω
12.6kΩ
FB
RT
1.8nF
Cable resistance
10µH
ROCP
SS
IIN
0.1µF
20µF
0.2µF
PGND
TEST CIRCUIT2
MM3630
VIN
SENS-
CE
SENS+
SYNC
COMP
ICOMP
IIN
A
SS
A
RT
FILTER
VIN
10µF
VCE
VCOMP
15nF
160kΩ
1µF
BS
SW
ROCP
A
FB
VDD1
P_GOOD
AGND
0.1µF
PGND
A
IROCP
ISW
VROCP
VSW
100kΩ
2.2µF
VFB
VSENS+ VSENS-
IOUT V VOUT_RL
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Timing Chart
(1) Start-up/ Shut-down
VIN
VCET
CE
VCET
VUVLO 4.2V typ.
VDD1
4.0V typ.
VSS 0.8V typ.
SS
VOUT ×0.95 typ.
VOUT
Soft start
time TSS
P_GOOD
(Pull-up)
Low LEVEL
(abnomal)
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.
(2) Low output voltage protection
VIN/CE
Output decrease
Shutdown
Output decrease
Re-start
VOUT
VFB 0.8V typ.
FB
VLVP 0.4V typ.
Soft start
time TSS
Latch delay
time TLATCH
1ms typ.
Soft start
time TSS
P_GOOD
(Pull-up)
Low LEVEL
(abnomal)
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.
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
(3) Over output voltage protection
VIN/CE
Shutdown
Output increase
Output increase
Re-start
VOUT
VOVP
VFB*120% typ.
VFB 0.8V typ.
FB
Latch delay
time TLATCH
1ms typ.
Soft start
time TSS
P_GOOD
(Pull-up)
Soft start
time TSS
Low LEVEL
(abnomal)
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.
(4) Thermal shutdown function
VIN/CE
Temperature decrease
TSD 170℃ typ.
Tj
Temperature increase
Δ TSD 30℃ typ.
VUVLO
4.2V typ.
VUVLO
4.2V typ.
4.0V typ.
VDD1
Shutdown
Re-start
VOUT
Soft start
time TSS
P_GOOD
(Pull-up)
Soft start
time TSS
Low LEVEL
(abnomal)
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 MM3630XV
(5) Current limit function
VIN/CE
Clamp by
Internal ILIM
IOUT
Output current
increase
External ILIM
Output current
increase
Shutdown
Re-start
VOUT
Latch delay
time TLATCH
1ms typ.
Soft start
time TSS
P_GOOD
(Pull-up)
Soft start
time TSS
Clamp Time <
Latch delay time
TLATCH 1ms typ.
Low LEVEL
(abnomal)
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
VOVP_IN
ΔVOVP_IN 0.9V typ.
VIN/CE
Shutdown
VOUT
Re-start
VFB 0.8V typ.
FB
P_GOOD
(Pull-up)
Soft start
time TSS
Soft start
time TSS
Low LEVEL
(abnomal)
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 MM3630XV
Application Circuit
IC
MM3630
VIN
Enable
CLK
C3
C1=
10µF
R3
VIN
SENS-
CE
SENS+
SYNC
BS
COMP
SW
SS
ROCP
RT
FB
FILTER
C5=
15nF
R5
C7=
1µF
VDD1
P_GOOD
AGND
C4=0.1µF
L
R6=3kΩ
R4
VOUT
R1
R2
R7=100kΩ
C6=
C2
2.2µF
C8=
0.22µF
PGND
GND
C1-C8 Ceramic capacitor
Recommended external parts value.
VOUT[V]
5.0
L [µH]
10
C2 [µF]
20
R1 [k ]
12.6
R2 [k ]
2.4
C3 [pF]
1800
R3 [k ]
12
R5 [k ]
160
· 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.
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Characteristics
(Except where noted otherwise VIN=12V, VCE=3V, Ta=25°C)
Efficiency
100
100
90
90
80
80
70
VIN=7V
VIN=12V
VIN=18V
VIN=33V
60
50
Efficiency [%]
Efficiency [%]
70
40
30
60
50
40
30
20
20
fSW=500kHz
R4=0.1Ω
RCABLE=open
10
0
VIN=7V
VIN=12V
VIN=18V
0.0
0.5
1.0
I OUT [A]
1.5
2.0
fSW=1MHz
R4=0.1Ω
RCABLE=open
10
0
2.5
0.0
0.5
1.0
I OUT [A]
1.5
2.0
2.5
Load Regulation
5.8
5.3
5.7
5.2
5.6
VIN=7V
VIN=12V
VIN=18V
VIN=33V
5.4
5.3
5.2
5.0
fSW=500kHz
R4=0.1Ω
RCABLE=0.25Ω
4.9
0.0
0.5
1.0
I OUT [A]
1.5
2.0
4.7
2.5
0.0
0.5
1.0
I OUT [A]
1.5
2.0
2.5
5.3
5.7
5.2
5.6
5.5
5.4
VIN=12V
VIN=18V
5.1
VIN=12V
VIN=18V
V OUT_RL [V]
V OUT [V]
fSW=500kHz
R4=0.1Ω
RCABLE=0.25Ω
4.8
5.8
5.3
VIN=7V
5.2
5.0
VIN=7V
4.9
5.1
5.0
fSW=1MHz
R4=0.1Ω
RCABLE=0.25Ω
4.9
4.8
5.0
4.9
5.1
4.8
VIN=7V
VIN=12V
VIN=18V
VIN=33V
5.1
V OUT_RL [V]
V OUT [V]
5.5
0.0
0.5
1.0
I OUT [A]
1.5
2.0
fSW=1MHz
R4=0.1Ω
RCABLE=0.25Ω
4.8
2.5
4.7
0.0
0.5
1.0
I OUT [A]
1.5
2.0
2.5
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Line Regulation
5.3
5.8
IOUT=2.5A
5.7
5.6
5.4
5.3
fSW=500kHz
R4=0.1Ω
RCABLE=0.25Ω
5.2
5.1
IOUT=0A
5.0
4.8
4.9
0
5.8
10
20
VIN [V]
30
4.7
40
0
10
20
VIN [V]
5.6
5.5
IOUT=2.5A
5.1
5.1
VOUT_RL [V]
5.4
fSW=1MHz
R4=0.1Ω
RCABLE=0.25Ω
5.2
IOUT=0A
40
fSW=1MHz
R4=0.1Ω
RCABLE=0.25Ω
5.2
5.3
30
5.3
IOUT=2.5A
5.7
VOUT [V]
IOUT=0A
4.9
5.0
IOUT=0A
5.0
4.9
5.0
4.8
4.9
4.8
IOUT=2.5A
5.1
VOUT_RL [V]
VOUT [V]
5.5
4.8
fSW=500kHz
R4=0.1Ω
RCABLE=0.25Ω
5.2
0
10
20
VIN [V]
30
40
4.7
0
10
20
VIN [V]
30
40
Load Transient Response
VOUT
0.5V/div
VIN=12V
fSW=500kHz
R4=0.1Ω
RCABLE=0.25Ω
VOUT
0.5V/div
VIN=12V
fSW=1MHz
R4=0.1Ω
RCABLE=0.25Ω
VOUT_RL
0.5V/div
VOUT_RL
0.5V/div
IOUT
IOUT
IOUT=0A to 1.5A
0.1A/μs
1A/div
100μs/div
IOUT=0A to 1.5A
0.1A/µs
1A/div
100µs/div
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Line Regulation
Operation Waveform
IOUT=1.5A
fSW=500kHz
R4=0.1Ω
RCABLE=open
VOUT
0.2V/div
VSW
10V/div
IOUT
VIN=7V to 18V
55mV/µs
10V/div
VOUT_RL
0.2V/div
IOUT=1A
fSW=500kHz
R4=0.1Ω
RCABLE=0.25Ω
200μs/div
Start-up
VIN
0.1V/div
VOUT
0.1V/div
IOUT
1A/div
IOUT
1μs/div
Shutdown
‹‹
Main: 1M
IOUT=1A
fSW=500kHz
R4=0.1Ω
RCABLE=open
››
‹‹
VCE
10V/div
Main: 1M
IOUT=1A
fSW=500kHz
R4=0.1Ω
RCABLE=open
››
VCE
10V/div
VSW
10V/div
VOUT
2V/div
IIN
0.5A/div
VSW
10V/div
VOUT
2V/div
IIN
0.5A/div
1ms/div
Oscillation Frequency vs R5
200µs/div
Low-side switch on-resistance vs Temperature
0.20
1200
1100
ISW=0.1A
1000
900
0.15
700
RONL [ Ω]
fSW [kHz]
800
600
500
0.10
400
300
0.05
200
100
0
10
100
R5 [kΩ]
1000
0.00
-40
-20
0
20
40
Ta [°C]
60
80
100
MITSUMI
Output voltage compensation DC/DC converter for USB MM3630XV
Feedback Voltage vs Temperature
Oscillation Frequency vs Temperature
0.812
550
540
0.808
530
520
fSW [kHz]
VFB [V]
0.804
0.800
0.796
-40
-20
0
20
40
Ta [°C]
60
80
450
100
-20
0
20
40
Ta [°C]
60
80
100
300
250
200
150
TOnMIN [ns]
TOFFMIN [ns]
-40
Minimum On time vs Temperature
200
100
150
100
50
50
-40
-20
0
20
40
Ta [°C]
60
80
100
ROCP Pin Input Current vs Temperature
105
104
VROCP=5V
103
102
I ROCP [μA ]
490
460
250
101
100
99
98
97
96
95
500
470
Minimum Off time vs Temperature
0
510
480
0.792
0.788
R5=160kΩ
-40
-20
0
20
40
Ta [°C]
60
80
100
0
-40
-20
0
20
40
Ta [°C]
60
80
100

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