LTC3870

19

3870fb

For more information www.linear.com/LTC3870

Typical applicaTions

High Efficiency 425kHz 3-phase 1.8V Step-Down Converter with Input Current Sensing

6V TO 14V

100

3

100

10µF

D1

M1

M2

0.1µF

0.22µF

24.9k

11.3k

4.99k

17.8k

2200pF

22µF

4.7µF

1µF

0.22µF

1.43k

1.43k

100k

D1 TO D3: CENTRAL CMDSH-3TR

L0 TO L2: VISHAY IHLP-4040DZ-11 0.56µH

M1, M3, M4: INFINEON BSC050NE2LS

M2, M5, M6: INFINEON BSC010NE2LSI

0.1µF

0.1µF

530µF

530µF

0.22µF

100pF

1µF

M3

M4

M6

M5

1.43k

1.43k

17.4k

1µF

20k

16.2k

1.43k

1.43k

1µF

530µF

1.8V

50A

5m

1µF

1µF

10nF

10µF

10nF

1µF

10k

10k

10k

10k

10k

10k

10k

10k

10nF

MMBT3906

3870 TA03

L0

0.56µH

L1

0.56µH

+

+

+

L2

0.56µH

FREQ_CFG

ASEL

LTC3883

GND

PGOOD

SYNC

RUN

SCL

SDA

WP

TSNS

PGND

SHARE_CLK

ALERT

GPIO

TG

BOOST

SW

BG

LTC3870

RUN0

RUN1

SYNC

FAULT0

FAULT1

BG0

SW0

BOOST0

TG0

TG1

BOOST1

SW1

BG1

PGND

PHASMD

FREQ

MODE0

MODE1

SGND

D2

D3