TPS40130

www.ti.com TPS40130 SLUS602B – JUNE 2004 – REVISED SEPTEMBER 2005 TWO-PHASE, SYNCHRONOUS BUCK CONTROLLER WITH INTEGRATED MOSFET DRIVERS FEATURES Two-Phase Interleaved Operation 3-V to 40-V Power Stage Operation Range Supports Up to 6-V VOUT With External Divider Requires VIN5 @ 50 mA, Typical, Depending on External MOSFETs and Switching Frequency 1-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 and Sets Input Undervoltage Lockout True Remote Sensing Differential Amplifier Resistive or Inductor’s DCR Current Sensing 30-pin TSSOP or 32-Pin QFN Packages Can Be Used with TPS40120 to Provide a 6-Bit Digitally Controlled Output DBT PACKAGE (TOP VIEW) APPLICATIONS Graphic Cards Internet Servers Networking Equipment Telecommunications Equipment DC Power Distributed Systems DESCRIPTION The TPS40130 is a two-phase synchronous buck controller that is optimized for low-output voltage, high-output current applications powered from a supply between 3 V and 40 V. A multi-phase converter offers several advantages over a single power stage including lower current ripple on the input and output capacitors, faster transient response to load steps, improved power handling capabilities, and higher system efficiency. Each phase can be operated at a switching frequency up to 1 MHz, resulti...