Datasheet > LM1575

LM1575

更新时间： 2024-01-29 23:03:56

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
27页	718K
描述
SIMPLE SWITCHER 1A Step-Down Voltage Regulator

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数据手册

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LM1575 数据手册

August 2004

LM1575/LM2575/LM2575HV

SIMPLE SWITCHER^®1A Step-Down Voltage Regulator

General Description

Features

n 3.3V, 5V, 12V, 15V, and adjustable output versions

n Adjustable version output voltage range,

1.23V to 37V (57V for HV version) 4% max over

line and load conditions

The LM2575 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, 15V, and an

adjustable output version.

n Guaranteed 1A output current

n Wide input voltage range, 40V up to 60V for HV version

n Requires only 4 external components

n 52 kHz fixed frequency internal oscillator

n TTL shutdown capability, low power standby mode

n High efficiency

n Uses readily available standard inductors

n Thermal shutdown and current limit protection

n P⁺Product Enhancement tested

Requiring a minimum number of external components, these

regulators are simple to use and include internal frequency

compensation and a fixed-frequency oscillator.

The LM2575 series offers a high-efficiency replacement for

popular three-terminal linear regulators. It substantially re-

duces the size of the heat sink, and in many cases no heat

sink is required.

A standard series of inductors optimized for use with the

LM2575 are available from several different manufacturers.

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-

put voltage within specified input voltages and output load

conditions, and 10% on the oscillator frequency. External

shutdown is included, featuring 50 µA (typical) standby cur-

rent. The output switch includes cycle-by-cycle current limit-

ing, as well as thermal shutdown for full protection under

fault conditions.

n Positive to negative converter (Buck-Boost)

Typical Application (Fixed Output Voltage

Versions)

01147501

Note: Pin numbers are for the TO-220 package.

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

DS011475

www.national.com

12 3 4 5 6 7...27

中文翻译

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与LM1575相关器件

型号	品牌	获取价格	描述	数据表
LM1575_07	NSC	获取价格	SIMPLE SWITCHER㈢ 1A Step-Down Voltage Regulat
LM1575-12	NSC	获取价格	SIMPLE SWITCHER 1A STEP-DOWN VOLTAGE REGULATOR
LM1575-15	NSC	获取价格	SIMPLE SWITCHER(TM) 1A STEP-DOWN VOLTAGE REGULATOR
LM1575-5.0AK	MICROCHIP	获取价格	Switching Regulator, Voltage-mode, 1.3A, 52kHz Switching Freq-Max, BIPolar, MBFM2, TO-3, 4
LM1575-5.0MD8	NSC	获取价格	IC 3.2 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator or
LM1575-5.0MW8	NSC	获取价格	IC 3.2 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, UUC, WAFER, Switching Regulator o
LM1575-ADJMD8	NSC	获取价格	IC 3.2 A SWITCHING REGULATOR, 62 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator or
LM1575AK	MICROCHIP	获取价格	Switching Regulator, Voltage-mode, 1.3A, 52kHz Switching Freq-Max, BIPolar, MBFM2, TO-3, 4
LM1575HVK-12/883	ETC	获取价格	Voltage-Mode SMPS Controller
LM1575HVK-15/883	ETC	获取价格	Voltage-Mode SMPS Controller

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