IR3081AM IRF [International Rectifier], IR3081AM Datasheet

IR3081AM

Manufacturer Part Number

IR3081AM

Description

XPHASETM VR 10 CONTROL IC

Manufacturer

IRF [International Rectifier]

Datasheet

1.IR3081AM.pdf (39 pages)

Current page: 1 of 39
Download datasheet (2Mb)

DESCRIPTION

FEATURES

Page 1 of 39

The IR3081A Control IC combined with an IR XPhase

to implement a complete VR 10 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 XPhase

to design while providing higher efficiency than conventional approaches. The IR3081A is intended for

VRD 10 or VRM/EVRD 10 applications that use external VCCVID/VTT circuits.

The IR3081A is functionally equivalent to the IR3081, but incorporates the following modifications:

•

Under Voltage Lockout start threshold increased from 9.1V to 9.7V (typical) and hysteresis increased

from 200mV to 800mV (typical).

Hysteresis (52mV typical) added to the SS/DEL comparator to prevent Power Good output chatter.

Over current discharge current increased from 6uA to 40uA (typical) to reduce the over current delay

time.

IIN pin precondition circuit added to disable current sharing in the phase ICs during soft start.

6 bit VR 10 compatible VID with 0.5% overall system accuracy

1 to X phases operation with matching phase ICs

Programmable Dynamic VID Slew Rate

No Discharge of output capacitors during Dynamic VID step-down (can be disabled)

+/-300mV Differential Remote Sense

Programmable 150kHz to 1MHz oscillator

Programmable VID Offset and Load Line output impedance

Programmable Softstart

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

Simplified Powergood provides indication of proper operation and avoids false triggering

Operates from 12V input with 9.1V Under-Voltage Lockout

6.8V/5mA Bias Regulator provides System Reference Voltage

Enable Input

Small thermally enhanced 28L MLPQ package

architecture results in a power supply that is smaller, less expensive, and easier

Phase IC provides a full featured and flexible way

XPHASE

VR 10 CONTROL IC

DATA SHEET

IR3081A

1/31

/05

Related parts for IR3081AM

Related keywords

IR3081AM datasheet
IR3081AM data sheet
IR3081AM pdf datasheet
IR3081AM component
IR3081AM part
IR3081AM distributor
IR3081AM RoHS
IR3081AM datasheet download