Datasheet > LM2672_07

LM2672_07

更新时间： 2024-09-29 04:44:35

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
26页	615K
描述
SIMPLE SWITCHER㈢ Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features

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LM2672_07 数据手册

April 2007

LM2672

SIMPLE SWITCHER^®Power Converter High Efficiency 1A

Step-Down Voltage Regulator with Features

To simplify the LM2672 buck regulator design procedure,

there exists computer design software, LM267X Made Sim-

General Description

The LM2672 series of regulators are monolithic integrated

circuits built with a LMDMOS process. These regulators pro-

vide all the active functions for a step-down (buck) switching

regulator, capable of driving a 1A load current with excellent

line and load regulation. These devices are available in fixed

output voltages of 3.3V, 5.0V, 12V, and an adjustable output

version.

ple version 6.0.

Features

Efficiency up to 96%

■

Available in SO-8, 8-pin DIP and LLP packages

Computer Design Software LM267X Made Simple

version 6.0

Requiring a minimum number of external components, these

regulators are simple to use and include patented internal

frequency compensation (Patent Nos. 5,382,918 and

5,514,947), fixed frequency oscillator, external shutdown,

soft-start, and frequency synchronization.

Simple and easy to design with

■

Requires only 5 external components

Uses readily available standard inductors

3.3V, 5.0V, 12V, and adjustable output versions

The LM2672 series operates at a switching frequency of

260 kHz, thus allowing smaller sized filter components than

what would be needed with lower frequency switching regu-

lators. Because of its very high efficiency (>90%), the copper

traces on the printed circuit board are the only heat sinking

needed.

Adjustable version output voltage range: 1.21V to 37V

±1.5% max output voltage tolerance over line and load

conditions

Guaranteed 1A output load current

■

0.25Ω DMOS Output Switch

Wide input voltage range: 8V to 40V

■

A family of standard inductors for use with the LM2672 are

available from several different manufacturers. This feature

greatly simplifies the design of switch-mode power supplies

using these advanced ICs. Also included in the datasheet are

selector guides for diodes and capacitors designed to work in

switch-mode power supplies.

260 kHz fixed frequency internal oscillator

TTL shutdown capability, low power standby mode

Soft-start and frequency synchronization

Thermal shutdown and current limit protection

Other features include a guaranteed ±1.5% tolerance on out-

put voltage within specified input voltages and output load

conditions, and ±10% on the oscillator frequency. External

shutdown is included, featuring typically 50 μA stand-by cur-

rent. The output switch includes current limiting, as well as

thermal shutdown for full protection under fault conditions.

Typical Applications

Simple High Efficiency (>90%) Step-Down (Buck)

Regulator

■

Efficient Pre-Regulator for Linear Regulators

■

Typical Application

(Fixed Output Voltage Versions)

1293401

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

Windows^®is a registered trademark of Microsoft Corporation.

12934

www.national.com

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与LM2672_07相关器件

型号	品牌	获取价格	描述	数据表
LM2672EP	NSC	获取价格	Enhanced Plastic SIMPLE SWITCHER Power Converter High Efficiency 1A Step-Down Voltage Regu
LM2672LD-12	TI	获取价格	Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
LM2672LD-12	NSC	获取价格	SIMPLE SWITCHER㈢ Power Converter High Efficie
LM2672LD-3.3	TI	获取价格	Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
LM2672LD-3.3	NSC	获取价格	SIMPLE SWITCHER㈢ Power Converter High Efficie
LM2672LD-3.3/NOPB	TI	获取价格	IC,SMPS CONTROLLER,VOLTAGE-MODE,BIPOLAR/MOS,LLCC,16PIN,PLASTIC
LM2672LD-5.0	NSC	获取价格	SIMPLE SWITCHER㈢ Power Converter High Efficie
LM2672LD-5.0	TI	获取价格	Power Converter High Efficiency 1A Step-Down Voltage Regulator with Features
LM2672LD-5.0	ROCHESTER	获取价格	2.2A SWITCHING REGULATOR, 275kHz SWITCHING FREQ-MAX, PDSO16, LLP-16
LM2672LD-5.0/NOPB	TI	获取价格	2.2A SWITCHING REGULATOR, 275kHz SWITCHING FREQ-MAX, PDSO16, LLP-16

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