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LCLT

更新时间： 2024-09-14 05:41:39

品牌	Logo	应用领域
凌特 - Linear		稳压器
页数	文件大小	规格书
24页	387K
描述
1.1MHz/2.2MHz, 500mA Step-Down Regulators in 2mm × 2mm DFN and MS10

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中文翻译

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数据手册

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LCLT 数据手册

LT3502/LT3502A

1.1MHz/2.2MHz, 500mA

Step-Down Regulators in

2mm × 2mm DFN and MS10

DESCRIPTION

FEATURES

The LT^®3502/LT3502A are current mode PWM step-down

DC/DC converters with an internal 500mA power switch,

in tiny 8-lead 2mm × 2mm DFN and 10-lead MS10

packages.Thewideinputvoltagerangeof3Vto40Vmakes

the LT3502/LT3502A suitable for regulating power from a

wide variety of sources, including 24V industrial supplies

and automotive batteries. Its high operating frequency

allows the use of tiny, low cost inductors and capacitors,

resulting in a very small solution. Constant frequency

abovetheAMbandavoidsinterferingwithradioreception,

making the LT3502A particularly suitable for automotive

applications.

■

3V to 40V Input Voltage Range

■

500mA Output Current

■

Switching Frequency: 2.2MHz (LT3502A),

1.1MHz (LT3502)

800mV Feedback Voltage

Short-Circuit Robust

Soft-Start

Low Shutdown Current: <2μA

Internally Compensated

Internal Boost Diode

Thermally Enhanced 2mm × 2mm 8-Lead DFN

■

and 10-lead MS10 Package

Cycle-by-cycle current limit and frequency foldback

provide protection against shorted outputs. Soft-start

and frequency foldback eliminates input current surge

duringstart-up. DAcurrentsenseprovidesfurtherprotec-

tion in fault conditions. An internal boost diode reduces

component count.

APPLICATIONS

■

Automotive Systems

■

Battery-Powered Equipment

Wall Transformer Regulation

■

Distributed Supply Regulation

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

All other trademarks are the property of their respective owners.

TYPICAL APPLICATION

LT3502A 12V_INEfﬁciency

3.3V Step-Down Converter

3.3V

OUT

BOOST

4.7V TO 40V

1μF

0.1μF

6.8μH

31.6k

OUT

3.3V

500mA

LT3502A

SHDN

OFF ON

GND

10k

10μF

3502 TA01a

0.4

0.5

0.1

0.2

0.3

LOAD CURRENT (A)

3502 TA01b

3502fc

12 3 4 5 6 7...24

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