IR3086A

DATA SHEET

DESCRIPTION

The IR3086A Phase IC combined with an IR XPhase

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 XPhase

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

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

•

OVP comparator with 150ns response

•

Phase Fault Detection

•

Programmable Phase Over-Temperature Detection

•

Small thermally enhanced 20L MLPQ package

APPLICATION CIRCUIT

DAC

CCS+

20k

RBIASIN

BIAS

CVCCL

RCS+

RAMP

L

RVCC

RMPIN+

1

RMPIN-

2

GATEH

14

VCCH

15

HOTSET

3

VRHOT

4

PGND

13

GATEL

12

ISHARE

5

VCCL

11

IR3086A

PHASE

IC

CCS-

ISHARE

RPWMRMP

CSCOMP

EA

CBST

VO

CO

VRHOT

PHASE FAULT

12V

DBST

VGATE

5 Wire Analog Bus

From Control IC

CVCC

RCS-

CIN

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