5-Bit VID Single-PhaseVoltage Regulator for IMVP-6+ Santa Rosa GPU Core

The ISL6263 IC is a Single-Phase Synchronous-Buck PWM voltage regulator featuring Intersil’s Robust Ripple Regulator (R³) Technology™. The ISL6263 is an implementation of the Intel®

Mobile Voltage Positioning (IMVP) protocol for GPU Render Engine core power. Integrated MOSFET drivers, bootstrap diode, and droop amplifier result in lower component cost and smaller implementation area.

Intersil’s R³ Technology™ combines the best features of both fixed-frequency PWM and hysteretic PWM, delivering excellent light-load efficiency and superior load transient response by commanding variable switching frequency during the transitory event.

Features

• Precision single-phase core voltage regulator

    - 0.5% system accuracy 0°C to +100°C

    - Differential remote GPU die voltage sensing

    - Differential droop voltage sensing

• Applications up to 25A

• Input voltage range: +5.0V to +25.0V

• Programmable PWM frequency: 200kHz to 500kHz

• Pre-biased output start-up capability

• 5-bit voltage identification input (VID)

    - 1.28750 to 0.41200V

    - 25.75mV steps

    - Sequential or non-sequential VID change on-the-fly

• Selectable diode emulation mode

    - Render Suspend mode only

    - Render Performance and Render Suspend mode

• Selectable audio filter in render suspend mode

• Integrated MOSFET drivers and bootstrap diode

• Choice of current sensing schemes

    - Lossless inductor DCR current sensing

    - Precision resistive current sensing

• Overvoltage, undervoltage, and overcurrent protection

• Pb-free plus anneal available (RoHS compliant)