LT3470A

更新时间： 2024-11-29 05:43:31

品牌	Logo	应用领域
凌特 - Linear		调节器二极管
页数	文件大小	规格书
20页	208K
描述
Micropower Buck Regulator with Integrated Boost and Catch Diodes

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LT3470A 数据手册

LT3470A

Micropower Buck Regulator

with Integrated Boost and

Catch Diodes

FEATURES

DESCRIPTION

The LT^®3470A is a micropower step-down DC/DC con-

verter that integrates a 440mA power switch, catch diode

and boost diode into low proﬁle 2mm × 3mm DFN

package. The LT3470A combines Burst Mode and

continuous operation to allow the use of tiny inductor

and capacitors while providing a low ripple output to

loads of up to 250mA.

Low Quiescent Current: 35μA at 12V to 3.3V

OUT

Integrated Boost and Catch Diodes

Input Range: 4V to 40V

3.3V at 250mA from 4V to 40V Input

5V at 250mA from 5.7V to 40V Input

Low Output Ripple: <10mV

<1μA in Shutdown Mode

Output Voltage: 1.25V to 16V

With its wide input range of 4V to 40V, the LT3470A can

regulateawidevarietyofpowersources,from2-cellLi-Ion

batteries to unregulated wall transformers and lead-acid

batteries. Quiescent current in regulation is just 35μA in

a typical application while a zero current shutdown mode

disconnects the load from the input source, simplifying

powermanagementinbattery-poweredsystems.Fastcur-

rent limiting and hysteretic control protects the LT3470A

and external components against shorted outputs, even

at 40V input. The LT3470A has higher output current and

improved start-up and dropout performance compared

to the LT3470.

Hysteretic Mode Control

– Low Ripple Burst Mode^®Operation at Light Loads

– Continuous Operation at Higher Loads

Solution Size as Small as 50mm

Low Proﬁle (0.75mm) 2mm × 3mm Thermally

Enhanced 8-Lead DFN Package

APPLICATIONS

Automotive Battery Regulation

Power for Portable Products

Distributed Supply Regulation

L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. Burst Mode

is a registered trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners.

Industrial Supplies

Wall Transformer Regulation

TYPICAL APPLICATION

Efﬁciency and Power Loss vs Load Current

1000

100

= 12V

5.7V TO 40V

0.22μF

33μH

BOOST

LT3470A

SHDN

OUT

OFF ON

2.2μF

250mA

BIAS

604k

22pF

22μF

GND

200k

3470a TA01

0.1

100

300

LOAD CURRENT (mA)

3470a TA02

3470afa

12 3 4 5 6 7...20

中文翻译

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与LT3470A相关器件

型号	品牌	获取价格	描述	数据表
LT3470AEDDB#PBF	Linear	获取价格	LT3470A - Micropower Buck Regulator with Integrated Boost and Catch Diodes; Package: DFN;
LT3470AEDDB#TRMPBF	Linear	获取价格	LT3470A - Micropower Buck Regulator with Integrated Boost and Catch Diodes; Package: DFN;
LT3470AEDDB#TRPBF	Linear	获取价格	LT3470A - Micropower Buck Regulator with Integrated Boost and Catch Diodes; Package: DFN;
LT3470AEDDB-PBF	Linear	获取价格	Micropower Buck Regulator with Integrated Boost and Catch Diodes
LT3470AEDDB-TRPBF	Linear	获取价格	Micropower Buck Regulator with Integrated Boost and Catch Diodes
LT3470AIDDB#PBF	Linear	获取价格	LT3470A - Micropower Buck Regulator with Integrated Boost and Catch Diodes; Package: DFN;
LT3470AIDDB#TRMPBF	Linear	获取价格	LT3470A - Micropower Buck Regulator with Integrated Boost and Catch Diodes; Package: DFN;
LT3470AIDDB#TRPBF	Linear	获取价格	LT3470A - Micropower Buck Regulator with Integrated Boost and Catch Diodes; Package: DFN;
LT3470AIDDB-PBF	Linear	获取价格	Micropower Buck Regulator with Integrated Boost and Catch Diodes
LT3470AIDDB-TRPBF	Linear	获取价格	Micropower Buck Regulator with Integrated Boost and Catch Diodes

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