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LT3470HDDB#TRPBF

更新时间： 2024-02-16 19:54:41

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	240K
描述
LT3470 - Micropower Buck Regulator with Integrated Boost and Catch Diodes; Package: DFN; Pins: 8; Temperature Range: -40°C to 125°C

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技术参数
数据手册

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LT3470HDDB#TRPBF 技术参数

是否无铅：	含铅	是否Rohs认证：	符合
生命周期：	Active	包装说明：	,
针数：	8	Reach Compliance Code：	unknown
Base Number Matches：	1

LT3470HDDB#TRPBF 数据手册

LT3470

Micropower Buck Regulator

with Integrated Boost and

Catch Diodes

FeaTures

DescripTion

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

verter that integrates a 300mA power switch, catch diode

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

ThinSOT™ packages. The LT3470 combines Burst Mode

and continuous operation to allow the use of tiny induc-

tor and capacitors while providing a low ripple output to

loads of up to 200mA.

Low Quiescent Current: 26µA at 12V to 3.3V

OUT

Integrated Boost and Catch Diodes

Input Range: 4V to 40V

Low Output Ripple: <10mV

<1µA in Shutdown Mode

Output Voltage: 1.25V to 16V

200mA Output Current

Hysteretic Mode Control

With its wide input range of 4V to 40V, the LT3470 can

regulateawidevarietyofpowersources,from2-cellLi-Ion

batteries to unregulated wall transformers and lead-acid

batteries. Quiescent current in regulation is just 26µA in

a typical application while a zero current shutdown mode

disconnects the load from the input source, simplifying

power management in battery-powered systems. Fast

currentlimitingandhystereticcontrolprotectstheLT3470

and external components against shorted outputs, even

at 40V input.

– Low Ripple Burst Mode^®Operation at Light Loads

– Continuous Operation at Higher Loads

Solution Size as Small as 50mm

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

Enhanced 8-Lead DD and 1mm ThinSOT Packages

applicaTions

Automotive Battery Regulation

Power for Portable Products

L, LT, LTC, LTM, Linear Technology, the Linear logo and Burst Mode are registered trademarks

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

property of their respective owners.

Distributed Supply Regulation

Industrial Supplies

Wall Transformer Regulation

Typical applicaTion

Efficiency and Power Loss vs Load Current

1000

100

= 12V

7V TO 40V

0.22µF

33µH

BOOST

LT3470

SHDN

OUT

OFF ON

2.2µF

200mA

BIAS

604k

22pF

22µF

GND

200k

3470 TA01a

0.1

100

LOAD CURRENT (mA)

3470 TA02

3470fd

12 3 4 5 6 7...20

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