LT3472

更新时间： 2024-11-29 22:46:55

品牌	Logo	应用领域
凌特 - Linear		转换器
页数	文件大小	规格书
8页	151K
描述
Inverting Micropower DC/DC Converter with Schottky in ThinSOT Package

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LT3472 数据手册

LT3483

Inverting Micropower

DC/DC Converter with

Schottky in ThinSOT Package

FEATURES

DESCRIPTIO

The LT^®3483 is a micropower inverting DC/DC converter

with integrated Schottky and one resistor feedback. The

smallpackagesize, highlevelofintegrationanduseoftiny

surface mount components yield a solution size as small

as 40mm². The device features a quiescent current of only

40µA at no load, which further reduces to 0.1µA in

shutdown.Acurrentlimited,fixedoff-timecontrolscheme

conserves operating current, resulting in high efficiency

over a broad range of load current. A precisely trimmed

10µA feedback current enables one resistor feedback and

virtually eliminates feedback loading of the output. The

40V switch enables voltage outputs up to –38V to be

generated without the use of costly transformers. The

LT3483’s low 300ns off-time permits the use of tiny low

profile inductors and capacitors to minimize footprint and

cost in space-conscious portable applications.

■

Internal 40V Schottky Diode

■

One Resistor Feedback (Other Resistor Inside)

■

Internal 40V, 200mA Power Switch

■

Generates Regulated Negative Outputs to –38V

■

Low Quiescent Current:

40µA in Active Mode

<1µA in Shutdown Mode

■

Low V_CESATSwitch: 200mV at 150mA

■

Wide Input Range: 2.5V to 16V

■

Uses Small Surface Mount Components

■

Output Short-Circuit Protected

■

Available in a 6-Lead SOT-23 Package

APPLICATIO S

■

LCD Bias

■

Handheld Computers

■

Battery Backup

The LT3483 is available in the low profile (1mm) SOT-23

(ThinSOT^TM) package.

■

Digital Cameras

■

OLED Bias

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

ThinSOT is a trademark of Linear Technology Corporation.

Patent pending.

TYPICAL APPLICATIO

Efficiency and Power Loss

3.6V to –8V DC/DC Converter

1000

100

= 3.6V

0.22µF

10µH

3.6V

EFFICIENCY

10Ω

OUT

–8V

25mA

LT3483

SHDN

GND

4.7µF

5pF

806k

POWER

LOSS

2.2µF

3483 TA01a

0.1

100

LOAD CURRENT (mA)

3483 TA01b

3483f

12 3 4 5 6 7 8

中文翻译

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