IR3081AMTR ,XPHASE VR 10.0 Control IC. A full featured and flexible way to implement a complete VR 10.0 power solution.applications that use external VCCVID/VTT circuits. The IR3081A is functionally equivalent to the ..
IR3081M ,XPHASE VR 10.0 Control IC. The Control IC combined with an IR XPhase TM Phase IC provides a full featured and flexible way toimplement a complete VR 10.0 power solution.FEATURES • 6 bit VR 10.0 compatible VID with 0.5% overall system accuracy • Programmable Dynamic VI ..
IR3081M ,XPHASE VR 10.0 Control IC. The Control IC combined with an IR XPhase TM Phase IC provides a full featured and flexible way toimplement a complete VR 10.0 power solution.FEATURES • 6 bit VR 10.0 compatible VID with 0.5% overall system accuracy • Programmable Dynamic VI ..
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IR3081AM-IR3081AMTR
XPHASE VR 10.0 Control IC. A full featured and flexible way to implement a complete VR 10.0 power solution.
International
19R Rectifier |R3081APBF
DATA SHEET
XPHASETM VR IO CONTROL IC
DESCRIPTION
The IR3081A Control IC combined with an IR XPhaseTM Phase IC provides a full featured and flexible way
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 XPhaseTM architecture results in a power supply that is smaller, less expensive, and easier
to design while providing higher efficiency than conventional approaches. The IR3081A is intended for
VRD 10 or VRM/EVRD 10 applications that use external VCCVIDNTT 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
o IIN pin precondition circuit added to disable current sharing in the phase ICs during soft start.
FEATURES
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
Page 1 of 39 1/31/05
International
IEER Rectifier
|R3081APBF
APPLICATION CIRCUIT
POWERGOore>-
SSIDEL A1
10 ohm
0.1uF -
CSS/DEL
< RMPOUT
B 8 t il 8
A- CyscDeu CL E VBIAS
VID5 =-' VIDs BBFB
VIDO =-3 VIDO IR3081A EAOUT
l/IDI ccr-4 VID1 CONTROL FB
VID2 c:-'' VID2 IC VDRP
VID3 =-6 VID3 IIN
VI04 =r--7- N/ID4 ' OCSET
2 0_luF
&— TRM4
fi— TRM1
fi— TRMZ
&— TRM3
RCP CCP G EA
_ 5 IMre Analog Bus
RDRPI CORP H to Phase ICs
<:| ISHARE
ROCSET =1 VDAC
RFB1 RFB
CVOAC VOSENSE+
Remote Sense
ORDERING INFORMATION
< VOSENSE-
Device Order Quantity
|R3081AMTRPbF 3000 per reel
IR3081AMPbF 100 piece strips
Page 2 of 39
1/31/05
