IR3088 データシートの表示（PDF） - International Rectifier

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IR3088

XPHASE™ PHASE IC WITH FAULT AND OVERTEMP DETECT

International Rectifier 

NOT RECOMMENDED FOR NEW

DESIGNS. REPLACE WITH IR3088A

Data Sheet No. PD94712

IR3088

XPHASETM PHASE IC WITH FAULT AND OVERTEMP DETECT

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

PACKAGE PINOUT

1

RMPIN+

2 RMPIN-

3 HOTSET

4

VRHOT

5 ISHARE

IR3088

PHASE

IC

15

VCCH

GATEH 14

PGND 13

12

GATEL

VCCL 11

Page 1 of 34

9/30/04

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