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LTM4656Y

Synchronous Boost µModule Regulator with Input-Output Short Protection

Analog Devices 

LTM4656/LTM4656-1

BLOCK DIAGRAM

NTSA545

SENSE1

(SENSE1 – BVIN)/RSENSE = INPUT I

VIN

VIN

47Ω

100k

SHDN

UVLO EXAMPLE:

~9V TURN ON > THAN

UV 1.275V = ON

20k

100k

VIN

VCC

1.275V

RETRY

VCC

1.375V

ITMR

0.5V

2µA

1.275V

MIN

RSENSE

0.004Ω

R

50mV/25mV +–

13V

IA

CHARGE

PUMP

SLEW CNTL

SHDN GATECNTL

FLT

UV CONTROL LOGIC

GATEOFF FLT RETRY ENABLE

TMR

0.01µF

4.3V

GND

IN-LINE PROTECTION BLOCK

BVIN

22µF

100µF*

75k

16V

×2

16V

5.1V

ZENER

0.1µF

50V

*BVIN NEEDS ≥100μF

INPUT CAPACITOR

TO SERVICE CURRENT

DURING SHORT FOR

PROPER CURRENT

LIMIT TIMEOUT.

RUN

POWER CONTROL

MOUT DRIVE

SS

221k

VFB

22pF

MOUT

4.7µH

PGOOD

COMP COMP NETW*

CURRENT SENSE

MBOOST DRIVE

MBOOST

VBIAS

VFB

INTVCC MODE_PLLIN GND FREQ

0.1µF

RUN SS PGOOD COMP VBIAS

4.7µF

INTVCC

MODE_PLLIN FREQ

VFB

VFB

0.1µF

PGOOD BVIN

10k

60.4k

11.5k

FLT

VOUT

0.1µF

50V

VOUT

10µF

150µF

35V

35V

×3

SW

TEMP+

470pF

TEMP–

GND

4656 BD

*LTM4656-1 Optional External Compensation

Rev. 0

8

For more information www.analog.com

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