IR3581
Description
The IR3581 is a dual-loop digital multi-phase buck controller designed for CPU voltage regulation, and is fully compliant with Intel® VR12 and compliant with VR12.5 Rev 1.3 PWM specifications. The IR3581 includes IR’s Efficiency Shaping Technology to deliver exceptional efficiency at minimum cost across the entire load range.
Key Features
- Ultra Low Quiescent Power Dual output 6+1 phase PWM Controller
- Intel® VR12, VR12.5 & Memory VR modes
- Overclocking & Gaming Modes
- PVI GPU VR mode
- Switching frequency from 194kHz to 2MHz per phase in 56 steps
- IR Efficiency Shaping Features including Variable Gate Drive, Dynamic Phase Control and Automatic Power State Switching
- Programmable 1-phase or 2-phase operation for Light Loads and Active Diode Emulation for Very Light Loads
- IR Adaptive Transient Algorithm (ATA) on both loops minimizes output bulk capacitors and system cost
- Auto-Phase Detection with PID Coefficient autoscaling
- Fault Protection: OVP, UVP, OCP, OTP, CAT FLT
