LTC3858_15 Datasheet, PDF(33/38 Page) Linear Technology – Low IQ, Dual 2-Phase Synchronous Step-Down Controller

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LTC3858_15 Datasheet, PDF (33/38 Pages) Linear Technology – Low IQ, Dual 2-Phase Synchronous Step-Down Controller

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LTC3858

TYPICAL APPLICATIONS

High Efï¬ciency Dual 24V/5V Step-Down Converter

RB1

487k

CF1

18pF C1

RA1

1nF

16.9k

CITH1A 100pF

SENSE1+

SENSE1â

VFB1

PGOOD2

PGOOD1

BG1

SW1

RITH1 46k

CITH1 680pF CSS1 0.01Î¼F

RFREQ

60k

CSS2 0.01Î¼F

BOOST1

ITH1

TG1

LTC3858

SS1

ILIM

PHASMD

CLKOUT

PLLIN/MODE

SGND

EXTVCC

RUN1

RUN2

FREQ

VIN

INTVCC

PGND

TG2

BOOST2

SS2

CITH2 680pF RITH2 17k

ITH2

SW2

BG2

100k INTVCC

100k

CB1

0.47Î¼F

CINT

4.7Î¼F

CB2

0.47Î¼F

MBOT1

22Î¼H

MTOP1

RSENSE1

25mÎ©

VIN

CIN 28V TO 38V

22Î¼F

VOUT1

24V

COUT1 1A

22Î¼F

Ã2

CERAMIC

MTOP2

RSENSE2

4.3Î¼H 7mÎ©

MBOT2

VOUT2

COUT2 5A

150Î¼F

CITH2A 100pF

RA2

75k

CF2 1nF

15pF

RB2

392k

VFB2

SENSE2â

SENSE2+

COUT2: SANYO 10TPD150M

L1: SUMIDA CDRH105R-220M

L2: SUMIDA CDEP105-4R3M

MTOP1, MTOP2, MBOT1, MBOT2: VISHAY Si7848DP

3858 TA04

3858fc

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