Data Sheet No. PD94704

IR3088A

DESCRIPTION

The IR3088A Phase IC combined with an IR XPhase

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 XPhase

expensive, and easier to design while providing higher efficiency than conventional approaches.

The IR3088A is intended for the following application conditions;

•

Excessive impedance between converter and load

•

Output voltage exceeding the control IC reference/VID voltage is desired

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 Braking

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

PACKAGE PINOUT

HOTSET

3

GATEH

14

VCCH

15

ISHARE

5

IR3088A

PHASE

IC

GATEL

12

RMPIN+

1

VRHOT

4

PGND

13

RMPIN-

2

VCCL

11

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