ISL62771 ISL62771HRTZ 62771 CPU CORE IC

Description

ISL62771 – Multiphase PWM Regulator for AMD Fusion Mobile Platforms

The ISL62771 is a dual-output synchronous buck controller engineered for high-performance processor core and graphics voltage regulation. It supports the AMD SVI 2.0 interface, enabling direct communication with the processor for dynamic voltage control. One of its outputs can operate in 1‑phase or 2‑phase mode (for core voltage), and the other supports 1-phase operation (for Northbridge or integrated GPU).

The internal PWM modulator uses Intersil’s Robust Ripple Regulator (R3™) architecture, which can automatically adjust switching frequency during load transients, improving both transient response and light-load efficiency. The ISL62771 supports multiple current-sensing methods — including lossless DCR (inductor) sensing or resistor-based sensing — and includes advanced features like differential remote sensing, programmable voltage droop, telemetry of current/voltage, and protection circuits (OVP, overcurrent, thermal monitoring).

Key Features:

• Dual-output controller with three integrated gate drivers

• Supports AMD SVI 2.0 (Serial VID interface)

• Core voltage range: 0.5 V to 1.55 V in fine steps (6.25 mV)

• Precision regulation: ±0.5 % system accuracy over temperature

• Programmable 1‑ or 2‑phase operation on core output

• Multiple current sensing options (lossless DCR, resistor)

• Differential remote voltage sensing

• Adaptive body-diode conduction time reduction

• Programmable frequency and VID droop offsets

• Telemetry outputs for voltage/current monitoring

• Protection: overvoltage, overcurrent, thermal shutdown

• Compact 40-lead TQFN (5 mm × 5 mm) package

Applications:

• AMD Fusion CPU / GPU core power

• Mobile computing (notebooks, ultrabooks)

• Integrated voltage regulation modules (VRMs)

• High-efficiency embedded systems requiring dual output regulation

No Return / No Exchange Policy / No Warranty.
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