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)