LM2578A

更新时间： 2024-10-02 12:05:11

品牌	Logo	应用领域
德州仪器 - TI		稳压器开关
页数	文件大小	规格书
30页	1641K
描述
LM2578A/LM3578A Switching Regulator

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数据手册

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LM2578A 数据手册

LM2578A, LM3578A

www.ti.com

SNVS767E –AUGUST 2000–REVISED APRIL 2013

LM2578A/LM3578A Switching Regulator

Check for Samples: LM2578A, LM3578A

FEATURES

DESCRIPTION

The LM2578A is a switching regulator which can

•

Inverting and Non-Inverting Feedback Inputs

1.0V Reference at Inputs

easily be set up for such DC-to-DC voltage

conversion circuits as the buck, boost, and inverting

configurations. The LM2578A features a unique

comparator input stage which not only has separate

pins for both the inverting and non-inverting inputs,

but also provides an internal 1.0V reference to each

input, thereby simplifying circuit design and p.c. board

layout. The output can switch up to 750 mA and has

output pins for its collector and emitter to promote

design flexibility. An external current limit terminal

may be referenced to either the ground or the V_in

terminal, depending upon the application. In addition,

the LM2578A has an on board oscillator, which sets

Operates from Supply Voltages of 2V to 40V

Output Current up to 750 mA, Saturation Less

than 0.9V

•

Current Limit and Thermal Shut Down

Duty Cycle up to 90%

APPLICATIONS

•

Switching Regulators in Buck, Boost,

Inverting, and Single-Ended Transformer

Configurations

the switching frequency with

a single external

capacitor from <1 Hz to 100 kHz (typical).

•

Motor Speed Control

Lamp Flasher

The LM2578A is an improved version of the LM2578,

offering higher maximum ratings for the total supply

voltage and output transistor emitter and collector

voltages.

Connection Diagram

Figure 1. PDIP/SOIC Package

See Package Number D0008A or P0008E

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...30

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