MITSUMI Output voltage compensation DC/DC converter for ......SYNC Low Voltage VSYNCL VSYNC=5V to 0V...

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


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


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.


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)


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


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-


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.


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)


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.


VIN/CE

VOUT

IOUT Output currentincrease

Output currentincrease

Shutdown

Re-start

Clamp byInternal ILIM

External ILIM

Clamp Time <Latch delay timeTLATCH 1ms typ.


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.


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


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]


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


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


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


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


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

MITSUMI Output voltage compensation DC/DC converter for ......SYNC Low Voltage VSYNCL VSYNC=5V to 0V...

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Transcript of MITSUMI Output voltage compensation DC/DC converter for ......SYNC Low Voltage VSYNCL VSYNC=5V to 0V...