LTC3444EDD-TR データシートの表示（PDF） - Linear Technology

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LTC3444EDD-TR

Micropower Synchronous Buck-Boost DC/DC Converter for WCDMA Applications

Linear Technology 

LTC3444

BLOCK DIAGRA

SW1

2

SW2

4

2.75V TO 5.5V

VIN

6

+

2.5A

3.5A

2.65V

A

B

GATE DRIVERS

AND

ANTI-CROSS

CONDUCTION

D

3A

C

PEAK

REVERSE

CURRENT

LIMIT

VOUT

5

INPUT

+

CURRENT

LIMIT

–

OUTLOW

1.8V

335k

OUTPUT OV

PEAK

+

CURRENT

LIMIT

–

+

UVLO

–

PWM LOGIC

AND

OUTPUT PHASING

PWM

COMPARATORS

THERMAL

SHUTDOWN

1.22V

100k

1.22V

EA

FB

8

INTERNAL

COMPENSATION

GND = INTERNAL COMP

FLOAT = EXTERNAL COMP

VC

7

OSC

SOFTSTART

1 VIN

THERMAL

SHUTDOWN

INTERNAL

SOFTSTART

SHDN

GND

UVLO

3

VOUT

3444 BD

3444fb

6

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