LT1617ES5-1 Linear Technology Corporation, LT1617ES5-1 Datasheet

LT1617ES5-1

Manufacturer Part Number

LT1617ES5-1

Description

Manufacturer

Linear Technology Corporation

Datasheets

1.LT1617ES5-TRPBF.pdf (8 pages)

2.LT1617ES5-1.pdf (8 pages)

3.LT1617ES5-1.pdf (8 pages)

Specifications of LT1617ES5-1

Date_code

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FEATURES

APPLICATIO S

TYPICAL

LCD Bias

Handheld Computers

Battery Backup

Digital Cameras

Low Quiescent Current:

Operates with V

Low V

Uses Small Surface Mount Components

High Output Voltage: Up to – 34V

Tiny 5-Lead SOT-23 Package

2.5V TO 4.2V

20 A in Active Mode

<1 A in Shutdown Mode

CESAT

APPLICATION

Switch: 250mV at 300mA

C1: TAIYO YUDEN LMK316BJ475

C2: TAIYO YUDEN EMK316BJ475

C3: TAIYO YUDEN TMK316BJ224

L1, L2: MURATA LQH3C220K34

D1: MOTOROLA MBR0530

1-Cell Li-Ion to –15V Inverting Converter

4.7 F

as Low as 1V

SHDN

LT1617

22 H

GND

NFB

0.22 F

22 H

267k

24.9k

DESCRIPTIO

4.7 F

1617/-1 TA01

The LT

converters in a 5-lead SOT-23 package. The LT1617 is

designed for higher power systems with a 350mA current

limit and an input voltage range of 1.2V to 15V, whereas

the LT1617-1 is intended for lower power and single-cell

applications with a 100mA current limit and an extended

input voltage range of 1V to 15V. Otherwise, the two

devices are functionally equivalent. Both devices feature a

quiescent current of only 20 A at no load, which further

reduces to 0.5 A in shutdown. A current limited, fixed off-

time control scheme conserves operating current, result-

ing in high efficiency over a broad range of load current.

The 36V switch allows high voltage outputs up to – 34V to

be easily generated without the use of costly transformers.

The LT1617’s low off-time of 400ns permits the use of

tiny, low profile inductors and capacitors to minimize

footprint and cost in space-conscious portable applications.

–15V

12mA

, LTC and LT are registered trademarks of Linear Technology Corporation.

1617/LT1617-1 are micropower inverting DC/DC

Micropower Inverting

DC/DC Converters

0.1

LT1617/LT1617-1

LOAD CURRENT (mA)

Efficiency

= 4.2V

in SOT-23

= 2.5V

1617/-1 TA01a

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