LT1615ES5 Linear Technology Corporation, LT1615ES5 Datasheet

LT1615ES5

Manufacturer Part Number

LT1615ES5

Description

Manufacturer

Linear Technology Corporation

Datasheets

1.LT1615IS5.pdf (8 pages)

2.LT1615ES5.pdf (8 pages)

3.LT1615ES5.pdf (8 pages)

Specifications of LT1615ES5

Date_code

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APPLICATIO S

FEATURES

TYPICAL APPLICATIO

2.5V TO 4.2V

LCD Bias

Handheld Computers

Battery Backup

Digital Cameras

Low Quiescent Current:

Operates with V

Low V

Tiny 5-Lead SOT-23 Package

Uses Small Surface Mount Components

High Output Voltage: Up to 34V

20 A in Active Mode

<1 A in Shutdown Mode

CESAT

1-Cell Li-Ion to 20V Converter for LCD Bias

C1: TAIYO YUDEN LMK316BJ475

C2: TAIYO YUDEN TMK316BJ105

D1: MOTOROLA MBR0530

L1: MURATA LQH3C100K24

Switch: 250mV at 300mA

4.7 F

as Low as 1V

SHDN

LT1615

10 H

GND

130k

1615/-1 TA01

1 F

20V

12mA

DESCRIPTIO

The LT

converters in a 5-lead SOT-23 package. The LT1615 is

designed for higher power systems with a 350mA current

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

the LT1615-1 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 in a simple boost topology without the

use of costly transformers. The LT1615’s low off-time of

400ns permits the use of tiny, low profile inductors and

capacitors to minimize footprint and cost in space-con-

scious portable applications.

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

1615/LT1615-1 are micropower step-up DC/DC

Micropower Step-Up

0.1

DC/DC Converters

0.3

= 4.2V

LOAD CURRENT (mA)

LT1615/LT1615-1

Efficiency

= 2.5V

in SOT-23

1615/-1 TA01a

= 3.3V

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