Datasheet > 电源电路 > 开关式稳压器或控制器> LM22673MRX-ADJ

LM22673MRX-ADJ

更新时间： 2024-11-06 05:41:59

品牌	Logo	应用领域
美国国家半导体 - NSC		稳压器软启动
页数	文件大小	规格书
18页	498K
描述
3A SIMPLE SWITCHER, Step-Down Voltage Regulator with Adjustable Soft-Start and Current Limit

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LM22673MRX-ADJ 数据手册

December 18, 2009

LM22673

3A SIMPLE SWITCHER®, Step-Down Voltage Regulator

with Adjustable Soft-Start and Current Limit

General Description

Features

The LM22673 series of regulators are monolithic integrated

circuits which provide all of the active functions for a step-

down (buck) switching regulator capable of driving up to 3A

loads with excellent line and load regulation characteristics.

High efficiency (>90%) is obtained through the use of a low

ON-resistance N-channel MOSFET. The series consists of a

fixed 5V output and an adjustable version.

Wide input voltage range: 4.5V to 42V

■

Internally compensated voltage mode control

Stable with low ESR ceramic capacitors

120 mΩ N-channel MOSFET TO-263 THIN package

100 mΩ N-channel MOSFET PSOP-8 package

Output voltage options:

-ADJ (outputs as low as 1.285V)

-5.0 (output fixed to 5V)

The SIMPLE SWITCHER^®concept provides for an easy to

use complete design using a minimum number of external

components and National’s Webench^®design tool. National’s

Webench^®tool includes features such as external component

calculation, electrical simulation, thermal simulation, and

Build-It boards for easy design-in. The switching clock fre-

quency is provided by an internal fixed frequency oscillator

which operates at 500 kHz. The LM22673 series also has built

in thermal shutdown and current limiting. The current limit

threshold can be adjusted using an external resistor. An ad-

justable soft-start feature is provided by selecting an appro-

priate external soft-start capacitor.

±1.5% feedback reference accuracy

Switching frequency of 500kHz

-40°C to 125°C operating junction temperature range

Adjustable soft-start

■

Adjustable current limit

Integrated boot diode

Fully Webench^®enabled

Step-down and inverting buck-boost applications

Package

PSOP-8 (Exposed Pad)

■

TO-263 THIN (Exposed Pad)

Applications

Industrial Control

■

Telecom and Datacom Systems

Embedded Systems

Automotive Telematics and Body Electronics

Conversions from Standard 24V, 12V and 5V Input Rails

■

Simplified Application Schematic

30076201

300762

www.national.com

12 3 4 5 6 7...18

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LM22673MRX-ADJ 替代型号

型号	品牌	替代类型	描述	数据表
LM22673MRE-ADJ	NSC	功能相似	3A SIMPLE SWITCHER, Step-Down Voltage Regulator with Adjustable Soft-Start and Current Lim
LM22673MR-ADJ	NSC	功能相似	3A SIMPLE SWITCHER, Step-Down Voltage Regulator with Adjustable Soft-Start and Current Lim

与LM22673MRX-ADJ相关器件

型号	品牌	获取价格	描述	数据表
LM22673MRX-ADJ/NOPB	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step
LM22673-Q1	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step
LM22673QMR-5.0/NOPB	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step
LM22673QMR-ADJ/NOPB	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step
LM22673QMRE-5.0/NOPB	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step
LM22673QMRE-ADJ/NOPB	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step
LM22673QMRX-5.0/NOPB	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step
LM22673QMRX-ADJ/NOPB	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step
LM22673QTJ-5.0/NOPB	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step
LM22673QTJ-ADJ/NOPB	TI	获取价格	LM22673/-Q1 42 V, 3 A SIMPLE SWITCHERÂ®, Step

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