5-Bit VID Single-Phase Voltage Regulator with Current Monitor for IMVP-6+ Santa Rosa GPU Core

The ISL6263B IC is a Single-Phase Synchronous-Buck PWM voltage regulator featuring Intersil’s Robust Ripple Regulator (R3) Technology™. The ISL6263B is an implementation of the Intel® Mobile Voltage Positioning (IMVP) protocol for GPU Render Engine core power. Integrated current monitor, droop amplifier, MOSFET drivers and bootstrap diode result in smaller implementation area and lower component cost.

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
• Real-time GPU current monitor output
• 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)
    - 1.28750V to 0.41200V
    - 25.75mV steps
    - Sequential or non-sequential VID change on-the-fly
• Configurable PWM modes
    - Forced continuous conduction mode
    - Automatic entry and exit of diode emulation mode
    - Selectable audible frequency PWM filter
• 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 (RoHS compliant)