Datasheet > LM3743_08

LM3743_08

更新时间： 2024-09-18 05:42:03

品牌	Logo	应用领域
美国国家半导体 - NSC		控制器
页数	文件大小	规格书
28页	580K
描述
High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features

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LM3743_08 数据手册

October 7, 2008

LM3743

High-Performance Synchronous Buck Controller with

Comprehensive Fault Protection Features

General Description

Features

The LM3743 is a DC-DC voltage mode PWM buck controller

featuring synchronous rectification at 300 kHz or 1 MHz. It can

deliver current as high as 20A and step down from an input

voltage between 3V and 5.5V down to a minimum output volt-

age of 0.8V, with a ±1.75% internal reference accuracy. The

LM3743 provides a set of comprehensive fault protection fea-

tures such as high-side current limit, output under-voltage

protection, and low-side current limit. When any of these fault

protection features are engaged, it enters a hiccup protection

mode which is suitable for high reliability systems such as

rack mounted servers and telecom base station subsystems.

The LM3743 also employs a proprietary monolithic glitch free

pre-bias start-up method suited for FPGA and ASIC logic de-

vices. An external programmable soft-start allows for tracking

and timing flexibility. The driver features 1.6Ω of pull-up re-

sistance and 1Ω of pull-down drive resistance for high power

density and very efficient power processing.

Input voltage from 3.0V to 5.5V

■

Output voltage adjustable down to 0.8V

Reference accuracy: ±1.75%, over full temperature and

input voltage range

High-side and Low-side N-Channel MOSFETs

■

Switching frequency options of 1 MHz or 300 kHz

Comprehensive Fault Protection Features:

High-side current limit

Low-side current limit

Output under-voltage protection

Hiccup mode protection eliminates thermal runaway

during fault conditions

■

Externally programmable soft-start with tracking capability

■

Pre-bias start-up capability

MSOP-10 package

Applications

Rack-mount servers

■

Telecom base stations

Routers

Printers/Scanners

Multi-media set-top boxes

FPGAs, ASICs, and DSPs

Typical Application

20177401

201774

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与LM3743_08相关器件

型号	品牌	获取价格	描述	数据表
LM3743_15	TI	获取价格	High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features
LM3743MM-1000	NSC	获取价格	N-Channel FET Synchronous Buck Controller for Low Output Voltages
LM3743MM-1000/NOPB	TI	获取价格	High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features
LM3743MM-300	NSC	获取价格	N-Channel FET Synchronous Buck Controller for Low Output Voltages
LM3743MM-300/NOPB	TI	获取价格	High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features
LM3743MMX-1000	NSC	获取价格	N-Channel FET Synchronous Buck Controller for Low Output Voltages
LM3743MMX-1000/NOPB	TI	获取价格	High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features
LM3743MMX-300	NSC	获取价格	N-Channel FET Synchronous Buck Controller for Low Output Voltages
LM3743MMX-300/NOPB	TI	获取价格	High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features
LM3753	NSC	获取价格	Scalable 2-Phase Synchronous Buck Controllers with Integrated FET Drivers and Linear Regul

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