DESCRIPTION

The IR3088 Phase IC combined with an IR XPhaseTM 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 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.

The IR3088 is intended for the following application conditions:

• Excessive impedance between converter and load

• Output voltage exceeding the control IC reference/VID voltage

FEATURES

• 2.5A Average Gate Drive Current

• Loss-Less Inductor Current Sense

• Internal Inductor DCR Temperature Compensation

• Programmable Phase Delay

• Programmable Feed-Forward Voltage Mode PWM Ramp

• Sub 100ns Minimum Pulse Width supports 1MHz per-phase operation

• Current Sense Amplifier drives a single wire Average Current Share Bus

• Current Share Amplifier reduces PWM Ramp slope to ensure sharing between phases

• Body BrakingTM disables Synchronous MOSFET for improved transient response and prevents negative output voltage at converter turn-off

• Phase Fault Detection

• Programmable Phase Over-Temperature Detection

• Control FET driver’s 25V input voltage capability simplifies boot-strap supply design

• Small thermally enhanced 20L MLPQ package