Datasheet > 电源电路 > 开关式稳压器或控制器> LM22676MRX-ADJ

LM22676MRX-ADJ

更新时间： 2024-10-02 05:42:03

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
16页	609K
描述
3A SIMPLE SWITCHER Step-Down Voltage Regulator with Precision Enable

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LM22676MRX-ADJ 数据手册

November 21, 2008

LM22676

3A SIMPLE SWITCHER®, Step-Down Voltage Regulator

with Precision Enable

General Description

Features

The LM22676 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.

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 exter-

nal component calculation, electrical simulation, thermal sim-

ulation, and Build-It boards for easy design-in. The switching

clock frequency is provided by an internal fixed frequency os-

cillator which operates at 500 kHz. The LM22676 series also

has built in thermal shutdown, current limiting and an enable

control input that can power down the regulator to a low 25

µA quiescent current standby condition.

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)

±1.5% feedback reference accuracy

Switching frequency of 500 kHz

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

Precision enable pin

■

Integrated boot diode

Integrated soft-start

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

30076501

300765

www.national.com

12 3 4 5 6 7...16

中文翻译

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LM22676MRX-ADJ 替代型号

型号	品牌	替代类型	描述	数据表
LM22676MRE-5.0	NSC	完全替代	3A SIMPLE SWITCHER Step-Down Voltage Regulator with Precision Enable
LM22676MR-ADJ	NSC	完全替代	3A SIMPLE SWITCHER Step-Down Voltage Regulator with Precision Enable
LM2576HVT-3.3	NSC	类似代替	SIMPLE SWITCHER 3A Step-Down Voltage Regulator

与LM22676MRX-ADJ相关器件

型号	品牌	获取价格	描述	数据表
LM22676MRX-ADJ/NOPB	TI	获取价格	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-
LM22676-Q1	TI	获取价格	LM22676/LM22676-Q1 42V, 3A SIMPLE SWITCHERÂ®
LM22676QMR-5.0/NOPB	TI	获取价格	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-
LM22676QMR-ADJ/NOPB	TI	获取价格	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-
LM22676QMRE-5.0/NOPB	TI	获取价格	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-
LM22676QMRE-ADJ/NOPB	TI	获取价格	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-
LM22676QMRX-5.0/NOPB	TI	获取价格	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-
LM22676QMRX-ADJ/NOPB	TI	获取价格	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-
LM22676QTJ-5.0/NOPB	TI	获取价格	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-
LM22676QTJ-ADJ/NOPB	TI	获取价格	LM22676/-Q1 42 V, 3 A SIMPLE SWITCHERÂ® Step-

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