LTC3890 Datasheet, PDF(33/36 Page) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

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LTC3890 Datasheet, PDF (33/36 Pages) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

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TYPICAL APPLICATIONS

High Efï¬ciency Dual 12V/5V Step-Down Converter

LTC3890

RA1

6.98k

RB1

100k

CITH1A 100pF

CITH1 470pF

RITH1

34.8k

CSS1 0.01Î¼F

RFREQ

41.2k

CSS2 0.01Î¼F

CITH2 470pF

RITH2

20k

RA2

18.7k

RB2

100k

SENSE1+

1nF

SENSE1â

PGOOD1

VFB1

PGOOD2

BG1

SW1

ITH1

BOOST1

LTC3890

TRACK/SS1

TG1

ILIM

PHSMD

CLKOUT

PLLIN/MODE

SGND

EXTVCC

RUN1

RUN2

FREQ

VIN

INTVCC

PGND

TG2

TRACK/SS2 BOOST2

SW2

ITH2

BG2

INTVCC

100k

CB1

0.47Î¼F

CINT

4.7Î¼F

CB2 0.47Î¼F

MBOT1 RSENSE1

9mÎ©

8Î¼H

COUT1

180Î¼F

MTOP1

CIN

220Î¼F

MTOP2

4.7Î¼H

RSENSE2

10mÎ©

MBOT2

VOUT1

12V

VIN

12.5V TO 60V

VOUT2

COUT2

470Î¼F

VFB2

SENSE2â

1nF

SENSE2+

MTOP1, MTOP2, MBOT1, MBOT2: RJK0651DPB

L1: COILCRAFT SER1360-802KL

L2: COILCRAFT SER1360-472KL

COUT1: 16SVP180MX

COUT2: SANYO 6TPE470M

D1, D2: DFLS1100

3890 TA04

3890f

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