LM3743 Datasheet | Texas Instruments

Features Check for Samples: LM3743 FEATURES - 2 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 k Hz - prehensive 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 DESCRIPTION The LM3743 is a DC-DC voltage mode PWM buck controller featuring synchronous rectification at 300 k Hz 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 prehensive 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 tele 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. APPLICATIONS - Rack-Mount Servers - Tele Base Stations - Routers - Printers/Scanners - Multi-Media Set-Top Boxes - FPGAs, ASICs, and DSPs Typical Application D1 VIN R6 BOOT HGATE C10 + Q1 C1 + C2 C3 SW LM3743...