IR3529 Datasheet | International Rectifier

DESCRIPTION The IR3529 Phase IC bined 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 phase of a TM multiphase converter. The XPhase3 architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches. The IR3529 provides two types of current sense outputs; ILL which contains average power supply current, information which can be used for voltage positioning and ISHARE which contains average active phase current information since current sense amplifiers of respective phases are disabled when in power savings mode. Higher efficiency can be expected due to increased driver capability along with reduced non-overlap durations. Turbo is included to improve load turn-on response. A SHIFT pin now municates to the control IC a change in phase IC on-line status resulting in controlled phase timing during PSI and Phase Shedding. The IR3529 also implements cycle-by-cycle over current protection to resolve high repetition rate load transients. FEATURES - - - - - - - - - - - - - - - - - - - - - Reduced dead time 7V gate drivers (6A GATEL sink current, 4A GATEH sink current) Turbo Mode load turn-on response enhancement Programmable cycle-by-cycle over current limit protection Phase status municated to control IC for controlled phase timing during PSI and Phase Shedding Power State Indicator (PSI) interface provides the capability to maximize the efficiency at light loads. Anti-bias circuitry Support converter output voltage up to 5.1 V (Limited to VCCL-1.8V) Loss-less inductor current sensing Phase delay DFF bypassed during PSI assertion mode to improve output ripple performance Over-current protection during PSI assertion mode operation Feed-forward...