IR3502
DATA SHEET
XPHASE3TM CONTROL IC DESCRIPTION
The IR3502 control IC combined with an XPHASE3TM Phase IC provides a full featured and flexible way to implement a complete VR11.0 and VR11.1 power solution. The IR3502 provides overall system control and interfaces with any number of Phase ICs, each driving and monitoring a single phase. The XPhase3TM architecture results in a power supply that is smaller, less expensive, and easier to design while providing higher efficiency than conventional approaches.
FEATURES
* * * * * * * * * * * * * * * * * * * * * * * * * * 1 to X phase operation with matching Phase IC 0.5% overall system set point accuracy Daisy-chain digital phase timing provides accurate phase interleaving without external components Programmable 250kHz to 9MHz clock oscillator frequency provides per phase switching frequency of 250kHz to 1.5MHz Programmable Dynamic VID Slew Rate Programmable VID Offset or No Offset Programmable Load Line Output Impedance High speed error amplifier with wide bandwidth of 30MHz and fast slew rate of 10V/us Programmable constant converter output current limit during soft start Hiccup over current protection with delay during normal operation Central over voltage detection and latch with programmable threshold and communication to phase ICs Over voltage signal output to system with overvoltage detection during powerup and normal operation Load current reporting Single NTC thermistor compensation for correct current reporting, OC Threshold, and Droop UVLO or ENABLE cycle to clear VID FAULT Delay comparator and OCP input filtering Remote sense AMP low voltage to eliminate bump at start-up Over voltage protection disabled during dynamic VID down to prevent false triggering Detection and protection of open remote sense line Open control loop protection IC bias linear regulator controller Programmable VRHOT function monitors temperature of power stage through a NTC thermistor Remote sense amplifier with true converter voltage sensing Simplified VR Ready (VRRDY) output provides indication of proper operation Small thermally enhanced 32L 5mm x 5mm MLPQ package RoHS compliant
ORDERING INFORMATION
Device IR3502MPBFTR * IR3502MPBF * Samples only Package 32 Lead MLPQ (5 x 5 mm body) 32 Lead MLPQ (5 x 5 mm body) Order Quantity 3000 per reel 100 piece strips
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Jan 08, 2008
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