LTM4677 datasheet(5/20 Pages) LINER

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LTC3870-1

38701f

For more information www.linear.com/LTC3870-1

Typical perForMance characTerisTics

Start-Up into a Pre-Biased Load

2-Phase Operation LTC3887-1

and LTC3870-1

Current Sense Threshold

vs ITH Voltage

INTVCC Line Regulation

DC Output Current Matching in

a 4-Phase Operation

LTC3887-1 and LTC3870-1

Dynamic Current Sharing During a

Load Transient in a 4-Phase System

LTC3887-1 and LTC3870-1

Quiescent Current vs Input

Voltage without EXTVCC

2ms/DIV

RUN

ALL RUN PINS

TIED TOGETHER

2V/DIV

VOUT

LTC3870–1

IN DCM

500mV/DIV

38701 G07

VIN = 12V

VOUT = 1.8V

INPUT VOLTAGE (V)

1.0

2.0

3.0

4.0

5.0

6.0

38701 G09

LTC3887–1 CH0

LTC3887–1 CH1

LTC3870–1 CH0

LTC3870–1 CH1

TOTAL OUTPUT CURRENT (A)

0 10 20 30 40 50 60 70 80 90 100

38701 G10

50µs/DIV

LTC3887–1 CH0

10A/DIV

LTC3887–1 CH1

10A/DIV

LTC3870–1 CH0

10A/DIV

LTC3870–1 CH1

10A/DIV

38701 G11

VIN = 12V

VOUT = 1.0V

ILOAD = 0A TO 32A TO 0A

INPUT VOLTAGE (V)

0.5

1.0

1.5

2.0

2.5

3.0

3.5

38701 G12

VITH (V)

–40

–20

0.5

1.5

2.5

38701 G08

RANGE LOW

RANGE HIGH

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