Datasheet > LT1944

LT1944

更新时间： 2024-12-02 14:57:47

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
8页	164K
描述
双通道、微功率升压型 DC/DC 转换器

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

LT1944 数据手册

LT1944

Dual Micropower Step-Up

DC/DC Converter

FEATURES

DESCRIPTIO

The LT^®1944 is a dual micropower step-up DC/DC con-

verter in a 10-pin MSOP package. Each converter is

designed with a 350mA current limit and an input voltage

range of 1.2V to 15V, making the LT1944 ideal for a wide

variety of applications. Both converters feature a quies-

centcurrentofonly20µAatnoload,whichfurtherreduces

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

control scheme conserves operating current, resulting in

highefficiencyoverabroadrangeofloadcurrent. The36V

switch allows high voltage outputs up to 34V to be easily

generated in a simple boost topology without the use of

costly transformers. The LT1944’s low off-time of 400ns

permits the use of tiny, low profile inductors and capaci-

tors to minimize footprint and cost in space-conscious

portable applications.

■

Low Quiescent Current:

A in Active Mode

µA in Shutdown Mode

■

Operates with V_INas Low as 1.2V

Low V_CESATSwitch: 250mV at 300mA

Uses Small Surface Mount Components

High Output Voltage: Up to 34V

Tiny 10-Pin MSOP Package

APPLICATIO S

■

LCD Bias

■

Handheld Computers

■

Battery Backup

Digital Cameras

■

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

TYPICAL APPLICATIO

Dual Output (5V, 30V) Boost Converter

5V Output Efficiency

4.7µH

80mA

2.7V

= 4.2V

TO 4.2V

SW1

4.7pF

= 2.7V

SHDN1

FB1

4.7µF

10µF

LT1944

SHDN2

FB2

324k

GND PGND PGND SW2

86.6k

0.1

100

LOAD CURRENT (mA)

4.7pF

1944 TA01a

1µF

10µH

30V

8mA

1944 TA01

C1: TAIYO YUDEN JMK212BJ475

C2: TAIYO YUDEN JMK316BJ106

C3: TAIYO YUDEN GMK316BJ105

D1, D2: ON SEMI MBR0540

L1: MURATA LQH3C4R7

L2: MURATA LQH3C100

12 3 4 5 6 7 8

中文翻译

下载PDF

与LT1944相关器件

型号	品牌	获取价格	描述	数据表
LT1944-1	Linear	获取价格	Dual Micropower Step-Up DC/DC Converter
LT1944-1	ADI	获取价格	双通道、微功率升压型 DC/DC 转换器
LT1944-1EMS	Linear	获取价格	Dual Micropower Step-Up DC/DC Converter
LT1944-1EMS#PBF	Linear	获取价格	LT1944-1 - Dual Micropower Step-Up DC/DC Converter; Package: MSOP; Pins: 10; Temperature R
LT1944EMS	Linear	获取价格	Dual Micropower Step-Up DC/DC Converter
LT1944EMS#PBF	Linear	获取价格	LT1944 - Dual Micropower Step-Up DC/DC Converter; Package: MSOP; Pins: 10; Temperature Ran
LT1944EMS#TR	Linear	获取价格	LT1944 - Dual Micropower Step-Up DC/DC Converter; Package: MSOP; Pins: 10; Temperature Ran
LT1944EMS#TRPBF	Linear	获取价格	LT1944 - Dual Micropower Step-Up DC/DC Converter; Package: MSOP; Pins: 10; Temperature Ran
LT1945	Linear	获取价格	Dual Micropower DC/DC Converter with Positive and Negative Outputs
LT1945	ADI	获取价格	具有正输出和负输出的双通道、微功率 DC/DC 转换器