Datasheet > LM2591

LM2591

更新时间： 2024-11-20 22:55:43

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
20页	725K
描述
SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator

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LM2591 数据手册

July 2003

LM2591HV

SIMPLE SWITCHER^®Power Converter 150 kHz 1A

Step-Down Voltage Regulator

current limit for the output switch and an over temperature

shutdown for complete protection under fault conditions.

General Description

The LM2591HV series of regulators are monolithic inte-

grated 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 de-

vices are available in fixed output voltages of 3.3V, 5V, and

an adjustable output version.

Features

n 3.3V, 5V, and adjustable output versions

n Adjustable version output voltage range, 1.2V to 57V

4% max over line and load conditions

n Guaranteed 1A output load current

n Available in 5-pin TO-220 and TO-263 (surface mount)

Package

This series of switching regulators is similar to the

LM2590HV, but without some of the supervisory and perfor-

mance features of the latter.

n Input voltage range up to 60V

n 150 kHz fixed frequency internal oscillator

n On/Off control

Requiring a minimum number of external components, these

regulators are simple to use and include internal frequency

†

compensation , improved line and load specifications and a

fixed-frequency oscillator.

n Low power standby mode, I_Qtypically 90 µA

n High Efficiency

n Thermal shutdown and current limit protection

The LM2591HV 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 5-lead TO-220 package with several

different lead bend options, and a 5-lead TO-263 Surface

mount package.

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 under all conditions of input voltage and output

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

ternal shutdown is included, featuring typically 90 µA

standby current. Self protection features include a two stage

n Positive to Negative converter

†

Note: Patent Number 5,382,918.

Typical Application (Fixed Output Voltage Versions)

10129301

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

DS101293

www.national.com

12 3 4 5 6 7...20

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与LM2591相关器件

型号	品牌	获取价格	描述	数据表
LM2591HV	NSC	获取价格	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2591HV	TI	获取价格	LM2591HV SIMPLE SWITCHER Power onverter 150 kHz 1A Step-Down Voltage
LM2591HV3.3MWC	NSC	获取价格	IC 3 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC, WAFER, Switching Regulator or
LM2591HV5.0MWC	TI	获取价格	3A SWITCHING REGULATOR, 173kHz SWITCHING FREQ-MAX, UUC, WAFER
LM2591HV5.0MWC	NSC	获取价格	IC 3 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC, WAFER, Switching Regulator or
LM2591HVADJMDC	NSC	获取价格	IC 3 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC, DIE, Switching Regulator or C
LM2591HVS-12	UMW	获取价格	DC-DC芯片
LM2591HVS-3.3	TI	获取价格	LM2591HV SIMPLE SWITCHER Power onverter 150 kHz 1A Step-Down Voltage
LM2591HVS-3.3	NSC	获取价格	SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
LM2591HVS-3.3	UMW	获取价格	DC-DC芯片

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