Datasheet Texas Instruments LM3743 — Datenblatt

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 В±1.75% internal reference accuracy. The LM3743
provides a set of comprehensive fault protection
features such as high-side current limit, output undervoltage 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 prebias 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. 1 2 Input Voltage From 3.0V to 5.5V
Output Voltage Adjustable Down to 0.8V
Reference Accuracy: В±1.75%, over Full …