Datasheet > 电源电路 > 开关式稳压器或控制器> LM2598S-12

LM2598S-12

更新时间： 2024-11-27 22:25:35

品牌	Logo	应用领域
美国国家半导体 - NSC		转换器稳压器
页数	文件大小	规格书
33页	849K
描述
SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator, with Features

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中文翻译

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数据手册

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LM2598S-12 数据手册

January 2001

LM2598

SIMPLE SWITCHER^®Power Converter 150 kHz

1A Step-Down Voltage Regulator, with Features

ternal shutdown is included, featuring typically 85 µA

standby current. Self protection features include a two stage

current limit for the output switch and an over temperature

shutdown for complete protection under fault conditions.

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.

Features

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

n Adjustable version output voltage range, 1.2V to 37V

This series of switching regulators is similar to the LM2595

series, with additional supervisory and performance features

added.

4% max over line and load conditions

n Guaranteed 1A output current

n 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 frequency

n Input voltage range up to 40V

n Excellent line and load regulation specifications

n 150 kHz fixed frequency internal oscillator

n Shutdown /Soft-start

n Out of regulation error flag

n Error output delay

n Low power standby mode, I_Qtypically 85 µA

n High Efficiency

n Uses readily available standard inductors

n Thermal shutdown and current limit protection

†

compensation , improved line and load specifications,

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 regulators.

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 than 12V,

and ambient temperatures less than 50˚C, no heat sink is

required.

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

n Simple high-efficiency step-down (buck) regulator

n Efficient pre-regulator for linear regulators

n On-card switching regulators

Other features include a guaranteed 4% tolerance on out-

n Positive to Negative converter

put voltage under all conditions of input voltage and output

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

Typical Application (Fixed Output Voltage Versions)

DS012593-1

†

Patent Number 5,382,918.

SIMPLE SWITCHER^®and Switchers Made Simple^®are registered trademarks of National Semiconductor Corporation.

DS012593

www.national.com

12 3 4 5 6 7...33

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与LM2598S-12相关器件

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

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