TPS40131

www.ti.com TPS40131 SLVS635 – FEBRUARY 2007 TWO-PHASE, SYNCHRONOUS BUCK CONTROLLER WITH INTEGRATED MOSFET DRIVERS FEATURES Supports 5-V Output Two-Phase Interleaved Operation Operates With Pre-Biased Outputs 1-V to 40-V Power Stage Operation Range Requires VIN5 @ 50 mA (typ) Depending on External MOSFETs and Switching Frequency 10-μA Shutdown Current Programmable Switching Frequency up to 1 MHz/Phase Current Mode Control with Forced Current Sharing Better than 1% Internal 0.7-V Reference Resistive Divider Sets Direct Output Over Voltage Threshold. Programmable Input Undervoltage Lockout True Remote Sensing Differential Amplifier Resistive or Inductor’s DCR Current Sensing 32-Pin QFN Package Can Be Used with TPS40120 to Provide a 6-Bit Digitally Controlled Output APPLICATIONS Point-of-Load Converter Graphic Cards Internet Servers Networking Equipment Telecommunications Equipment DC Power Distributed Systems RHB PACKAGE (TOP VIEW) HDRV1 SW1 VIN5 LDRV1 PGND LDRV2 SW2 HDRV2 BOOT1 OVSET VOUT GSNS DIFFO CS1 CSRT1 COMP 32 31 30 29 28 27 26 25 1 24 2 23 3 22 4 21 5 20 6 19 7 18 89 10 11 12 13 14 17 15 16 BOOT2 SS UVLO BP5 AGND CS2 CSRT2 RT VREF +EA FB VDD BP8 EN/SYNC ILIM PGOOD DESCRIPTION The TPS40131 is a two-phase synchronous buck controller that is optimized for low-output voltage, high-output current applications powered from a supply between 1 V and 40 V. A multi-phase converter offers several advantages ove...