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LM2698MM-ADJ

更新时间： 2025-08-08 22:24:59

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器
页数	文件大小	规格书
17页	505K
描述
SIMPLE SWITCHER 1.35A Boost Regulator

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数据手册

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LM2698MM-ADJ 数据手册

October 2001

LM2698

SIMPLE SWITCHER^®1.35A Boost Regulator

General Description

Features

n 1.9A, 0.2Ω, internal switch (typical)

n Operating voltage as low as 2.2V

The LM2698 is a general purpose PWM boost converter.

The 1.9A, 18V, 0.2ohm internal switch enables the LM2698

to provide efficient power conversion to outputs ranging from

2.2V to 17V. It can operate with input voltages as low as 2.2V

and as high as 12V. Current-mode architecture provides

superior line and load regulation and simple frequency com-

pensation over the device’s 2.2V to 12V input voltage range.

The LM2698 sets the standard in power density and is

capable of supplying 12V at 400mA from a 5V input. The

LM2698 can also be used in flyback or SEPIC topologies.

n 600kHz/1.25MHz adjustable frequency operation

n Switchers Made Simple^®software

n 8-Lead MSOP package

Applications

n 3.3V to 5V, 5V to 12V conversion

n Distributed Power

The LM2698 SIMPLE SWITCHER^®features a pin selectable

switching frequency of either 600kHz or 1.25MHz. This pro-

motes flexibility in component selection and filtering tech-

niques. A shutdown pin is available to suspend the device

and decrease the quiescent current to 5µA. An external

compensation pin gives the user flexibility in setting fre-

quency compensation, which makes possible the use of

small, low ESR ceramic capacitors at the output. Switchers

Made Simple^®software is available to insure a quick, easy

and guaranteed design. The LM2698 is available in a low

profile 8-lead MSOP package.

n Set-Top Boxes

n DSL Modems

n Diagnostic Medical Instrumentation

n Boost Converters

n Flyback Converters

n SEPIC Converters

Typical Application Circuit

20012658

SIMPLE SWITCHER^®is a registered trademark of National Semiconductor Corporation.

DS200126

www.national.com

12 3 4 5 6 7...17

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