Datasheet > LM2598-12

LM2598-12

更新时间： 2024-11-25 23:46:47

品牌	Logo	应用领域
其他 - ETC		转换器稳压器
页数	文件大小	规格书
28页	571K
描述
SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator with Features(572.00 k)

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LM2598-12 数据手册

May 1996

LM2598

SIMPLE SWITCHER Power Converter

150 kHz 1A Step-Down Voltage Regulator,

with Features

General Description

The LM2598 series of regulators are monolithic integrated

circuits that provide all the active functions for a step-down

(buck) switching regulator, capable of driving a 1A load with

excellent line and load regulation. These devices are avail-

able in fixed output voltages of 3.3V, 5V, 12V, and an adjust-

able output version.

by current. Self protection features include a two stage cur-

rent limit for the output switch and an over temperature

shutdown for complete protection under fault conditions.

Features

3.3V, 5V, 12V, and adjustable output versions

This series of switching regulators is similar to the LM2595

series, with additional supervisory and performance features

added.

Adjustable version output voltage range, 1.2V to 37V

4% max over line and load conditions

Guaranteed 1A output current

Available in 7-pin TO-220 and TO-263 (surface mount)

package

Requiring a minimum number of external components,

these regulators are simple to use and include internal fre-

quency compensation , improved line and load specifica-

Input voltage range up to 40V

Excellent line and load regulation specifications

150 kHz fixed frequency internal oscillator

Shutdown/Soft-start

tions, fixed-frequency oscillator, Shutdown/Soft-start, error

flag delay and error flag output.

The LM2598 series operates at a switching frequency of

150 kHz thus allowing smaller sized filter components than

what would be needed with lower frequency switching regu-

lators. Available in a standard 7-lead TO-220 package with

several different lead bend options, and a 7-lead TO-263

surface mount package. Typically, for output voltages less

Out of regulation error flag

Error output delay

Low power standby mode, I typically 85 mA

High Efficiency

than 12V, and ambient temperatures less than 50 C, no

heat sink is required.

Uses readily available standard inductors

Thermal shutdown and current limit protection

A standard series of inductors (both through hole and sur-

face mount types) are available from several different manu-

facturers optimized for use with the LM2598 series. This

feature greatly simplifies the design of switch-mode power

supplies.

Applications

Simple high-efficiency step-down (buck) regulator

Efficient pre-regulator for linear regulators

On-card switching regulators

Other features include a guaranteed 4% tolerance on out-

put voltage under all conditions of input voltage and output

Positive to Negative converter

load conditions, and 15% on the oscillator frequency. Ex-

ternal shutdown is included, featuring typically 85 mA stand-

Typical Application (Fixed Output Voltage Versions)

TL/H/12593–1

Patent Number 5,382,918.

SIMPLE SWITCHERÉ and Switchers Made SimpleÉ are registered trademarks of National Semiconductor Corporation.

1996 National Semiconductor Corporation

TL/H/12593

RRD-B30M66/Printed in U. S. A.

12 3 4 5 6 7...28

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与LM2598-12相关器件

型号	品牌	获取价格	描述	数据表
LM2598-3.3	ETC	获取价格	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator with Features(572.0
LM2598-5.0	ETC	获取价格	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator with Features(572.0
LM2598-ADJ	ETC	获取价格	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator with Features(572.0
LM2598S-12	NSC	获取价格	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features
LM2598S-12	TI	获取价格	2.6A SWITCHING REGULATOR, 173kHz SWITCHING FREQ-MAX, PSSO7, TO-263, SMT-7
LM2598S-12/NOPB	NSC	获取价格	IC 2.6 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PSSO7, TO-263, SMT-7, Switching
LM2598S-12/NOPB	TI	获取价格	4.5V 至 40V、1A SIMPLE SWITCHER® 降压转换器 \| KTW \|
LM2598S-3.3	TI	获取价格	2.6A SWITCHING REGULATOR, 173kHz SWITCHING FREQ-MAX, PSSO7, TO-263, SMT-7
LM2598S-3.3	NSC	获取价格	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features
LM2598S-3.3/NOPB	NSC	获取价格	IC 2.6 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PSSO7, TO-263, SMT-7, Switching

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