TPS40101

TPS40101 www.ti.com SLUS726 – SEPTEMBER 2006 MIDRANGE INPUT SYNCHRONOUS BUCK CONTROLLER WITH ADVANCED SEQUENCING AND OUTPUT MARGINING FEATURES Operation over 4.5 V to 18 V Input Range 100 kHz to 1 MHz Voltage Mode Control Output Voltage Range From 0.69 V to 5.5 V Simultaneous, Ratiometric and Sequential Startup Sequencing Remote Sensing (Via Separate GND/PGND) 24-Pin QFN Package Thermal Shutdown Programmable Overcurrent Protection Power Good Indicator 1%, 690-mV Reference Output Margining, 3% and 5% Programmable UVLO and Hysteresis Frequency Synchronization APPLICATIONS Servers Networking Equipment Telecommunications Equipment Power Supply Modules CONTENTS Device Ratings 2 Electrical Characteristics 3 Terminal Information 5 Typical Characteristics 8 Application Information 15 Design Example 29 Additional References 30 DESCRIPTION The TPS40101 is a wide-input synchronous, step-down controller that offers programmable closed loop soft-start, programmable UVLO and hysteresis, programmable current limit with hiccup recovery and can be synchronized to other timebases. The TPS40101 incorporates MOSFET gate drivers for external N-channel MOSFETs. Gate drive logic incorporates adaptive anti-cross conduction circuitry for improved efficiency, reducing diode conduction in the rectifier MOSFET. TYPICAL APPLICATION VTRKN VIN 24 23 22 21 20 19 MGU MGD SYNC PG VO ISNS 1 COMP VDD 18 2 FB SW 17 3 TRKOUT 4 TRKIN TPS40101 HDRV 16...