LTM8045 datasheet(13/54 Pages) AD

13 / 54 page

LTM4655

Rev. 0

For more information www.analog.com

TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, single channel negative-VOUTn–

operation only, unless otherwise noted.

Start-Up, Pre-Bias

Short Circuit, No Load

Short Circuit, 1.25A Load

–24V Transient Response, 12VIN

Start-Up, No Load

Start-Up, 1.25A Load

–5V Transient Response, 24VIN

FIGURE 48 CIRCUIT, 24VIN,

CINOUTn = CINHn = CDGNDn = CDn = 4.7F,

COUTn = 47F ×2, RfSETn = 665k,

RISETn = 100k, RPGDFBn = 36.5k,

REXTVCCn = 20, 1.8A TO 3.8A LOAD STEP AT 2A/s

40s/DIV

VOUTn–

100mV/DIV

AC-COUPLED

IOUTn–

1A/DIV

4655 G19

FIGURE 48 CIRCUIT,

0.625A TO 1.25A LOAD STEP AT 0.625A/s

20s/DIV

VOUTn–

100mV/DIV

AC-COUPLED

IOUTn–

0.4A/DIV

4655 G20

FIGURE 48 CIRCUIT, APPLICATION OF 12VIN,

START-UP INTO NO LOAD

1ms/DIV

VINn

5V/DIV

RUN

2V/DIV

PGOOD

5V/DIV

VOUTn–

10V/DIV

4655 G21

FIGURE 48 CIRCUIT, APPLICATION OF 12VIN,

START-UP INTO 19.2Ω LOAD

1ms/DIV

VINn

5V/DIV

IOUTn–

500mA/DIV

PGOOD

5V/DIV

VOUTn–

10V/DIV

4655 G22

FIGURE 48 CIRCUIT, VOUTn– PRE-BIASED

TO –5V THROUGH A 1N4148 DIODE PRIOR

TO RUN

n TOGGLING HIGH

1ms/DIV

VOUTn–

10V/DIV

RUN

2V/DIV

PGOOD

2V/DIV

IDIODEn

100mA/DIV

4655 G23

FIGURE 48 CIRCUIT,

NO LOAD PRIOR TO APPLICATION OF

VOUTn– SHORT-CIRCUIT

10s/DIV

VOUTn–

10V/DIV

IINn

10A/DIV

4655 G24

FIGURE 48 CIRCUIT,

19.2 LOAD PRIOR TO APPLICATION OF

VOUTn– SHORT-CIRCUIT

10s/DIV

VOUTn–

10V/DIV

IINn

10A/DIV

4655 G25

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