Control IC 28-Pin MLPQ EP T/R

The IR3081A Control IC combined with an IR XPhase 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 XPhase 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 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 Power good 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