LTM4643 datasheet(6/30 Pages) AD

6 / 30 page

LTM4638

Rev. C

For more information www.analog.com

Start-up Waveform with 15A Load

Current

Output Short Circuit Waveform

with 15A Load Current Applied

Output Short Circuit Waveform

without Load Applied

Start-up into Pre-Biased Output

Steady-State Output Voltage

Ripple

TYPICAL PERFORMANCE CHARACTERISTICS

5ms/DIV

RUN

5V/DIV

PGOOD

5V/DIV

VOUT

1V/DIV

IIN

2A/DIV

4638 G10

VIN=12V, VOUT=1V, fS=600kHz

COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR

INTERNAL COMPENSATION, COMPa CONNECT TO

COMPb, CFF=33pF, CSS=0.1µF

50µs/DIV

VOUT

1V/DIV

IIN

1A/DIV

4638 G11

VIN=12V, VOUT=1.5V, fS=800kHz

COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR

INTERNAL COMPENSATION, COMPa CONNECT TO

COMPb, CFF=33pF

50µs/DIV

VOUT

1V/DIV

IIN

1A/DIV

4638 G12

VIN=12V, VOUT=1.5V, fS=800kHz

COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR

INTERNAL COMPENSATION, COMPa CONNECT TO

COMPb, CFF=33pF

5ms/DIV

VOUT

2V/DIV

IIN

0.5A/DIV

RUN

5V/DIV

PGOOD

5V/DIV

4638 G13

VIN=12V, VOUT=3.3V, fS=800kHz

COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR

INTERNAL COMPENSATION, COMPa CONNECT TO

COMPb, CFF=33pF, PREBIASED OUTPUT TO 1.2V,

CSS=0.1µF

500ns/DIV

OUTPUT

VOLTAGE

10mV/DIV

AC COUPLED

4638 G14

VIN=12V, VOUT=1.5V, fS=800kHz

COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR

INTERNAL COMPENSATION, COMPa CONNECT TO

COMPb, CFF=33pF

LTM4643 Datasheet(PDF) 6 Page - Analog Devices

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