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LT1617ES5-1

更新时间： 2024-11-08 22:22:43

品牌	Logo	应用领域
凌特 - Linear		转换器
页数	文件大小	规格书
8页	146K
描述
Micropower Inverting DC/DC Converters in SOT-23

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中文翻译

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LT1617ES5-1 数据手册

LT1617/LT1617-1

Micropower Inverting

DC/DC Converters

in SOT-23

FEATURES

DESCRIPTIO

The LT^®1617/LT1617-1 are micropower inverting DC/DC

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 20µA at no load, which further

reduces to 0.5µA 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

beeasilygeneratedwithouttheuseofcostlytransformers.

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.

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

■

Low Quiescent Current:

A in Active Mode

<1µA in Shutdown Mode

■

Operates with V_INas Low as 1V

Low V_CESATSwitch: 250mV at 300mA

Uses Small Surface Mount Components

High Output Voltage: Up to –34V

Tiny 5-Lead SOT-23 Package

APPLICATIO S

■

LCD Bias

■

Handheld Computers

■

Battery Backup

Digital Cameras

■

TYPICAL APPLICATION

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

Efficiency

0.22µF

22µH

–15V

2.5V TO 4.2V

= 4.2V

12mA

= 2.5V

267k

4.7µF

LT1617

SHDN

NFB

GND

4.7µF

24.9k

C1: TAIYO YUDEN LMK316BJ475

C2: TAIYO YUDEN EMK316BJ475

C3: TAIYO YUDEN TMK316BJ224

L1, L2: MURATA LQH3C220K34

D1: MOTOROLA MBR0530

1617/-1 TA01

0.1

LOAD CURRENT (mA)

1617/-1 TA01a

12 3 4 5 6 7 8

中文翻译

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