DESCRIPTION

· The IR35211 is a dual loop digital multi-phase buck controller designed for CPU voltage regulation.
· Fully compliant with AMD® SVI1 & SVI2 Rev 1.2 and Intel® VR12 Rev 1.5 & VR12.5 Rev 1.3 PWM specifications.
· Incorporates IR’s Efficiency Shaping Technology for high efficiency across all load ranges.
· Features Dynamic Phase Control and Adaptive Transient Algorithm (ATA) to minimize output bulk capacitors.
· Supports Multiple Time Programming (MTP) for easy custom configuration.
· Provides extensive fault protection including OVP, UVP, OCP, and OTP.
· Includes thermistor-based temperature sensing with VRHOT signal.
· Simplifies VRD design with "set-and-forget" methodology for fast time-to-market.

FEATURES

· Dual output 3+1 phase PWM Controller.
· Supports AMD® SVI1 & SVI2 and Intel® VR12 & VR12.5.
· Switching frequency from 200kHz to 2MHz per phase.
· Programmable 1-phase operation and Active Diode Emulation.
· IR Adaptive Transient Algorithm (ATA) minimizes output bulk capacitors.
· Auto-Phase Detection with auto-compensation.
· Per-Loop Fault Protection: OVP, UVP, OCP, OTP.
· I2C/SMBus/PMBus system interface for telemetry.
· Compatible with IR ATL and 3.3V tri-state Drivers.
· Operates at +3.3V supply voltage, -40°C to 85°C ambient.

APPLICATIONS

· AMD® SVI1 & SVI2, Intel® VR12 & VR12.5 based systems.
· Desktop & Notebook CPU VRs.
· High Performance Graphics Processors.