LTC3892_15 Datasheet, PDF(33/36 Page) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

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LTC3892_15 Datasheet, PDF (33/36 Pages) Linear Technology – 60V Low IQ, Dual, 2-Phase Synchronous Step-Down DC/DC Controller

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LTC3892/LTC3892-1

Typical Applications

VOUT1

VIN

4.5V TO 60V

CINA

33ÂµF

CINB

2.2ÂµF

x3 MTOP1

RSNS1

9mÎ©

4.9ÂµH

COUT1A

220ÂµF

COUT1B

22ÂµF

MBOT1

RA1

357k

RB1

68.1k

RUN1 VIN RUN2

TG1

BOOST1

CB1

0.1ÂµF

SW1

TG2

BOOST2

SW2

BG1

BG2

LTC3892-1

SENSE1+

CSNS1

1nF SENSE1â

SENSE2+

SENSE2â

VFB1

ITH1

VFB2

ITH2

TRACK/SS1

TRACK/SS2

RITH1

15k

CITH1A

1.5nF

CITH1B

100pF

CSS1

0.1ÂµF

EXTVCC

FREQ

PLLIN/MODE

DRVUV

INTVCC GND

DRVSET

DRVCC

MTOP2

CB2

0.1ÂµF

6.5ÂµH

RSNS2

15mÎ©

MBOT2

COUT2B

4.7ÂµF

CSNS2

1nF

RA2

649k

VOUT2

CSS2

0.1ÂµF

RDRVCC

80.6k

CITH2B

68pF

CITH2A

2.2nF

RB2

68.1k

RITH2

15kk

VOUT2

8.5V*

COUT2A

68ÂµF

CINTVCC

0.1ÂµF

CDRVCC

4.7ÂµF

3892 TA05

TOP1, TOP2, BOT1, BOT2: BSZ123N08NS3

L1: WURTH 744314490

L2: WURTH 744314490

*VOUT2 FOLLOWS VIN WHEN VIN â¤ 8.5V

COUT1A: SANYO 6TPB220ML

COUT2A: SANYO 10TPC68M

Figure 13. High Efficiency Dual-Phase Step-Down 5V/8.5V Converter with 8V Gate Drive

For more information www.linear.com/LTC3892

38921f

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