LM22673MRE-ADJ National Semiconductor, LM22673MRE-ADJ Datasheet

LM22673MRE-ADJ

Manufacturer Part Number

LM22673MRE-ADJ

Description

Manufacturer

National Semiconductor

Datasheets

1.LM22673MRX-ADJ.pdf (16 pages)

2.LM22673MRE-ADJ.pdf (18 pages)

3.LM22673MRE-ADJ.pdf (16 pages)

Specifications of LM22673MRE-ADJ

Case

8-PSOP

Notes

NEW

Date_code

10+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

H&T Electronics

Part Number:

LM22673MRE-ADJ/NOPB

Quantity:

500

Current page: 1 of 16
Download datasheet (480Kb)

LM22673

3A SIMPLE SWITCHER®, Step-Down Voltage Regulator

with Adjustable Soft-Start and Current Limit

General Description

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.

The SIMPLE SWITCHER

use complete design using a minimum number of external

components and National’s Webench

Webench

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.

Simplified Application Schematic

tool includes features such as external component

concept provides for an easy to

design tool. National’s

300762

Features

■

Package

■

Applications

■

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:

±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

Step-down and inverting buck-boost applications

PSOP-8 (Exposed Pad)

TO-263 THIN (Exposed Pad)

Industrial Control

Telecom and Datacom Systems

Embedded Systems

Automotive Telematics and Body Electronics

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

-ADJ (outputs as low as 1.285V)

-5.0 (output fixed to 5V)

enabled

30076201

November 21, 2008

www.national.com

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