IR3527

IR3527 DATA SHEET XPHASE3TM DUAL PHASE IC DESCRIPTION The IR3527 Dual Phase IC combined with an IR XPhase3 Control IC provides a full featured and flexible way to implement multiphase power solutions. The Control IC provides overall system control and interfaces with any number of IR3527 Phase ICs which each drive and monitor 2 phases of a Synchronous Buck converter. The IR3527 implement an independent power savings function for each power stage and sequential phase timing for use in single output multiphase converters. When power saving mode is enabled, the power stage will disable its output thus eliminating its switching loss while proper converter operation is maintained by the single power stage or in conjunction with other converter power stages. The IR3527 current sense amplifiers remain active when in power savings to support adaptive voltage positioning. TM FEATURES x x x x x x x x x x x x 7V/1.3A gate drivers (2.6A 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 Self-calibration of PWM ramp, current sense amplifier, and current share amplifier Single-wire bidirectional average current sharing Only three external components per phase, plus common decoupling capacitors Power State Indicator (PSI) interface provides the capability to maximize the efficiency at light loads. Debugging function isolates phase from the converter Small...