LT3581IMSE-TRPBF データシートの表示（PDF） - Linear Technology

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LT3581IMSE-TRPBF

3.3A Boost/Inverting DC/DC Converter with Fault Protection

Linear Technology 

LT3581

BLOCK DIAGRAM

VIN

CIN

L1

RFAULT

OPTIONAL

D1

M1

COUT1

RGATE

COUT2

VOUT

GATE

FAULT

SOFT-

START

VC

933µA

22V

DIE TEMP MIN

165°C

VIN

750mV

2.1V

50mV +

– 1.8V –

250k

+

SS

LDO

CSS

STARTUP

AND FAULT

LOGIC

DRIVER

DISABLE

SHDN

+

1.33V –

VIN

1.215V

REFERENCE

UVLO

SW1

**

42V

MIN

SW2

SAMPLE MODE BLOCK

**

42V

MIN

1.17V

ISW1

FB

1.9A

MIN

TD ~ 30ns

45mV

SW2

SAMPLE

VBE • 0.9

RFB

COMPARATOR

–

AA33

+

SR1

DRIVER

R

Q

S

Q2 SW1

27mΩ

Q1

+

14.6k

A1

–

FB

∑

RAMP

GENERATOR

RS

A4

20mΩ

GND

14.6k

+

A2

–

FREQUENCY ÷N ADJUSTABLE

FOLDBACK

OSCILLATOR

SS

SYNC

BLOCK

VC

RC

CC

SYNC

RT

CLKOUT

RT

**SW OVERVOLTAGE PROTECTION IS NOT GUARANTEED TO PROTECT THE LT3581 DURING SW OVERVOLTAGE EVENTS

3581 BD

Figure 1. Block Diagram

3581fb

8

For more information www.linear.com/LT3581

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