Datasheet > LT3463A_15

LT3463A_15

更新时间： 2024-09-16 01:22:35

品牌	Logo	应用领域
凌特 - Linear		/
页数	文件大小	规格书
8页	198K
描述
Dual Micropower DC/DC Converters with Schottky Diodes

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LT3463A_15 数据手册

LT3463/LT3463A

Dual Micropower

DC/DC Converters

with Schottky Diodes

FEATURES

DESCRIPTIO

The LT^®3463/LT3463A are dual micropower DC/DC con-

verters with internal Schottky diodes in a 10-lead 3mm ×

3mm DFN package. Negative and positive LT3463 con-

verters have a 250mA current limit. The LT3463A positive

converter also has a 250mA limit, while the negative

converter has a 400mA limit. Both devices have an input

voltage range of 2.4V to 15V, making them ideal for a wide

variety of applications. Each converter features a quies-

cent current of only 20µA, which drops to under 1µA in

shutdown.Acurrentlimited,fixedoff-timecontrolscheme

conserves operating current, resulting in high efficiency

overabroadrangeofloadcurrent.The42Vswitchenables

high voltage outputs up to ±40V to be easily generated

withouttheuseofcostlytransformers. Thelow300nsoff-

time permits the use of tiny, low profile inductors and

capacitors to minimize footprint and cost in space-con-

scious portable applications.

■

Generates Well-Regulated Positive and

Negative Outputs

■

Low Quiescent Current:

A (per Converter) in Active Mode

µA in Shutdown Mode

■

Internal 42V Power Switches

Internal 42V Schottky Diodes

Low V_CESATSwitch: 180mV at 150mA

Input Voltage Range: 2.4V to 15V

High Output Voltages: Up to ±40V

Low Profile (0.8mm) 3mm x 3mm DFN Package

APPLICATIO S

■

CCD Bias

■

LCD Bias

■

Handheld Computers

Digital Cameras

■

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

TYPICAL APPLICATIO

CCD Bias Supply (15V, –8V)

Efficiency and Power Loss

10µH

240

200

160

120

OUT1

= 3.6V

15V

2.7V

15V EFFICIENCY

10mA

TO 5V

4.7µF

2.2µF

SW1 V

OUT1

–8V EFFICIENCY

90.9k

SHDN1

FB1

LT3463A

REF

154k

SHDN2

GND

FB2

SW2

15V LOSS

–8V LOSS

10pF

1µF

10µH

OUT2

0.1

100

–8V

LOAD CURRENT (mA)

50mA

4.7µF

3463 TA01b

3463 TA01a

3463f

12 3 4 5 6 7 8

中文翻译

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