Datasheet > LM2705MF-ADJ

LM2705MF-ADJ

更新时间： 2024-11-15 22:18:31

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器
页数	文件大小	规格书
11页	365K
描述
Micropower Step-up DC/DC Converter with 150mA Peak Current Limit

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LM2705MF-ADJ 数据手册

April 2003

LM2705

Micropower Step-up DC/DC Converter with 150mA Peak

Current Limit

General Description

Features

n 150mA, 0.7Ω, internal switch

n Uses small surface mount components

n Adjustable output voltage up to 20V

n 2.2V to 7V input range

The LM2705 is a micropower step-up DC/DC in a small

5-lead SOT-23 package. A current limited, fixed off-time

control scheme conserves operating current resulting in high

efficiency over a wide range of load conditions. The 21V

switch allows for output voltages as high as 20V. The low

400ns off-time permits the use of tiny, low profile inductors

and capacitors to minimize footprint and cost in space-

conscious portable applications. The LM2705 is ideal for

LCD panels requiring low current and high efficiency as well

as white LED applications for cellular phone back-lighting.

The LM2705 can drive up to 3 white LEDs from a single

Li-Ion battery. The low peak inductor current of the LM2705

makes it ideal for USB applications.

n Input undervoltage lockout

n 0.01µA shutdown current

n Small 5-Lead SOT-23 package

Applications

n LCD Bias Supplies

n White LED Back-Lighting

n Handheld Devices

n Digital Cameras

n Portable Applications

Typical Application Circuit

20039701

FIGURE 1. Typical 20V Application

DS200397

www.national.com

12 3 4 5 6 7...11

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