Datasheet > LM3743_15

LM3743_15

更新时间： 2024-09-19 01:11:11

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德州仪器 - TI		/
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High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features

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LM3743_15 数据手册

LM3743

www.ti.com

SNVS427E –SEPTEMBER 2006–REVISED APRIL 2013

LM3743 High-Performance Synchronous Buck Controller with Comprehensive Fault

Protection Features

Check for Samples: LM3743

FEATURES

DESCRIPTION

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 voltage of 0.8V, with

a ±1.75% internal reference accuracy. The LM3743

provides a set of comprehensive fault protection

features 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

devices. An external programmable soft-start allows

for tracking and timing flexibility. The driver features

1.6Ω of pull-up resistance 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

VSSOP-10 Package

APPLICATIONS

•

Rack-Mount Servers

Telecom Base Stations

Routers

Printers/Scanners

Multi-Media Set-Top Boxes

FPGAs, ASICs, and DSPs

Typical Application

V_IN

BOOT

C10

VCC

HGATE

V_OUT

LM3743

ILIM

SS/TRACK

COMP/EN

LGATE

GND

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...38

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与LM3743_15相关器件

型号	品牌	获取价格	描述	数据表
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
LM3753	TI	获取价格	LM3753 Scalable 2-Phase Synchronous Buck Controller with Integrated FET Drivers and Linear

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