IR3581

Datasheet Product Brief IR3581  Dual Outpu  t Digital Multi-Phase Controller 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  I2C/SMBus/PMBus system interface for reporting of Temperature, Voltage, Current & Power telemetry for both loops  Multiple Time Programming (MTP) with integrated charge pump for easy non-volatile programming  Compatible with 3.3V tri-state drivers and IR ATL mode drivers  +3.3V supply voltage; -40oC to 85oC ambient operation  Pb-Free, RoHS, 6x6mm 48-pin, 0.4mm pitch QFN APPLICATIONS  Intel® VR12 and VR12.5 based systems  Servers and High End Desktop CPU VRs  High Performance Graphics Processors 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...