Datasheet > LM2595T-12

LM2595T-12

更新时间： 2024-11-17 22:25:31

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
29页	937K
描述
SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator

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LM2595T-12 数据手册

May 1999

LM2595

SIMPLE SWITCHER^®Power Converter 150 kHz

1A Step-Down Voltage Regulator

General Description

Features

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

The LM2595 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.

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

4% max over line and load conditions

n Available in TO-220 and TO-263 (surface mount)

packages

n Guaranteed 1A output load current

n Input voltage range up to 40V

n Requires only 4 external components

n Excellent line and load regulation specifications

n 150 kHz fixed frequency internal oscillator

n TTL shutdown capability

n Low power standby mode, I_Qtypically 85 µA

n High efficiency

Requiring a minimum number of external components, these

regulators are simple to use and include internal frequency

†

compensation , and a fixed-frequency oscillator.

The LM2595 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 5-lead TO-220 package with

several different lead bend options, and a 5-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.

n Uses readily available standard inductors

n Thermal shutdown and current limit protection

Applications

A standard series of inductors are available from several dif-

ferent manufacturers optimized for use with the LM2595 se-

ries. This feature greatly simplifies the design of

switch-mode power supplies.

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 specified input voltage and output load

†

Note: Patent Number 5,382,918.

conditions, and 15% on the oscillator frequency. External

shutdown is included, featuring typically 85 µA stand-by cur-

rent. Self protection features include a two stage frequency

reducing current limit for the output switch and an over tem-

perature shutdown for complete protection under fault condi-

tions.

Typical Application (Fixed Output Voltage Versions)

DS012565-1

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

DS012565

www.national.com

12 3 4 5 6 7...29

中文翻译

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LM2595T-12 替代型号

型号	品牌	替代类型	描述	数据表
LM2595T-12/NOPB	TI	功能相似	LM2595 SIMPLE SWITCHERÂ® Power Converter 150

与LM2595T-12相关器件

型号	品牌	获取价格	描述	数据表
LM2595T-12/NOPB	NSC	获取价格	IC 2.6 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PZFM5, BENT STAGGERED, TO-220, 5
LM2595T-12/NOPB	TI	获取价格	LM2595 SIMPLE SWITCHERÂ® Power Converter 150
LM2595T-3.3	NSC	获取价格	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2595T-3.3	TI	获取价格	LM2595 SIMPLE SWITCHERÂ® Power Converter 150
LM2595T-3.3/NOPB	TI	获取价格	LM2595 SIMPLE SWITCHERÂ® Power Converter 150
LM2595T-3.3/NOPB	NSC	获取价格	IC 2.6 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, PZFM5, BENT STAGGERED, TO-220, 5
LM2595T-5.0	TI	获取价格	LM2595 SIMPLE SWITCHERÂ® Power Converter 150
LM2595T-5.0	NSC	获取价格	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2595T-5.0/LF02	TI	获取价格	LM2595 SIMPLE SWITCHERÂ® Power Converter 150
LM2595T-5.0/NOPB	TI	获取价格	LM2595 SIMPLE SWITCHERÂ® Power Converter 150

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