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)