5-Bit VID Single-Phase Voltage Regulator with Current Monitor for GPU Core Power

The ISL6263C IC is a Single-Phase Synchronous-Buck PWM voltage regulator for GPU core power application. It features Intersil’s Robust Ripple Regulator (R3) Technology™. Integrated current monitor, differential remote sense amplifier, MOSFET driver and bootstrap diode result in smaller implementation area and lower component cost.

Features
• Precise Single-Phase Core Voltage Regulator
    - 0.5% System Accuracy 0°C to +100°C
    - Differential Remote GPU Die Voltage Sense
• 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)
    - 0.41200V to 1.28750V
    - 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 Sense Schemes
    - Lossless Inductor DCR Current Sense
    - Precise Resistive Current Sense
• Overvoltage, Undervoltage and Overcurrent Protection
• Pb-Free (RoHS Compliant)