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IR3081
DATA SHEET
XPHASETM VR 10.0 CONTROL IC
DESCRIPTION
The IR3081 Control IC combined with an IR XPhaseTM Phase IC provides a full featured and flexible way
to implement a complete VR 10.0 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 XPhaseTM architecture results in a power supply that is smaller, less expensive, and easier
to design while providing higher efficiency than conventional approaches.
The IR3081 is intended for VRD or VRM/EVRD 10.0 applications that use external VCCVID/VTT circuits.
FEATURES
• 6 bit VR 10.0 compatible VID with 0.5% overall system accuracy
• 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 indicDaatitoanSohfepert4oUpe.croomperation 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
DataShee
PACKAGE PINOUT
1 OSCDS
2 VID5
3 VID0
4 VID1
5 VID2
6 VID3
7 VID4
IR3081
CONTROL
IC
VBIAS
BBFB
EAOUT
FB
VDRP
IIN
OCSET
21
20
19
18
17
16
15
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