DESCRIPTION

The IR3084A Control IC combined with an IR XPhaseTM Phase IC provides a full featured and flexible way to implement a complete VR10 or VR11 power solution. 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 multiphase converter. The XPhaseTM 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

? Supports both VR11 8-bit VID code and extended VR10 7-bit VID code

? 0.5 Overall System Setpoint Accuracy

? VID Select pin sets the DAC to either VR10 or VR11

? VID Select pin selects either VR11 or legacy VR10 type startups

? Programmable VID offset and Load Line output impedance

? Programmable VID offset function at the Error Amp’s non-inverting input allowing zero offset

? Programmable Dynamic VID Slew Rate

? ±300mV Differential Remote Sense

? Programmable 150kHz to 1MHz oscillator

? Enable Input with 0.85V threshold and 100mV of hysteresis

? VR Ready output provides indication of proper operation and avoids false triggering

? Phase IC Gate Driver Bias Regulator / VRHOT Comparator

? Operates from 12V input with 9.9V Under-Voltage Lockout

? 6.9V/6mA Bias Regulator provides System Reference Voltage

? Programmable Hiccup Over-Current Protection with Delay to prevent false triggering

? Small thermally enhanced 5mm x 5mm, 28 pin MLPQ package