Datasheet > LM2717_08

LM2717_08

更新时间： 2024-10-27 04:44:35

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
14页	323K
描述
Dual Step-Down DC/DC Converter

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LM2717_08 数据手册

March 4, 2008

LM2717

Dual Step-Down DC/DC Converter

General Description

Features

The LM2717 is composed of two PWM DC/DC buck (step-

down) converters. The first converter is used to generate a

fixed output voltage of 3.3V. The second converter is used to

generate an adjustable output voltage. Both converters fea-

ture low R_DSON(0.16Ω) internal switches for maximum effi-

ciency. Operating frequency can be adjusted anywhere

between 300kHz and 600kHz allowing the use of small ex-

ternal components. External soft-start pins for each enables

the user to tailor the soft-start times to a specific application.

Each converter may also be shut down independently with its

own shutdown pin. The LM2717 is available in a low profile

24-lead TSSOP package ensuring a low profile overall solu-

tion.

Fixed 3.3V output buck converter with a 2.2A, 0.16Ω,

■

internal switch

Adjustable buck converter with a 3.2A, 0.16Ω, internal

switch

■

Operating input voltage range of 4V to 20V

Input undervoltage protection

■

300kHz to 600kHz pin adjustable operating frequency

Over temperature protection

Small 24-Lead TSSOP package

Applications

TFT-LCD Displays

■

Handheld Devices

Portable Applications

Laptop Computers

Typical Application Circuit

20078501

200785

www.national.com

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