IR3507
Description
The IR3507 Phase IC combined with an IR XPhase3 Control IC provides a full featured and flexible way to implement power solutions for the latest high performance CPUs and ASICs. The “Control” IC provides overall system control and interfaces with any number of “Phase” ICs which each drive and monitor a single TM phase of a multiphase converter.
Key Features
- Power State Indicator (PSI) interface provides the capability to maximize the efficiency at light loads. 7V/2A gate drivers (4A GATEL sink current) Converter output voltage up to 5.1 V (Limited to VCCL-1.4V) Loss-less inductor current sensing Feed-forward voltage mode control Integrated boot-strap synchronous PFET Only four external components per phase 3 wire analog bus connects Control and Phase ICs (VID, Error Amp, IOUT) 3 wire digital bus for accurate daisy-chain phase timing control without external components Anti-bias circuitry prevents excessive sag in output voltage during PSI de-assertion PSI input is ignored during power up Debugging function isolates phase IC from the converter Self-calibration of PWM ramp, current sense amplifier, and current share amplifier Single-wire bidirectional average current sharing Small thermally enhanced 20L 4 X 4mm MLPQ package RoHS compliant
