International Rectifier IR3081A
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.| Part No. | IR3081A |
|---|---|
| Datasheet | IR3081A Download |
| Manufacturer |  International Rectifier |
| Description | XPHASETM VR 10 CONTROL IC |
| Buy | Stock & Price |
DESCRIPTION
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.
FEATURES
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● 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 Programmab...
