Dual Output Digital Multi-Phase Controller

The IR3564B/70B is a dual loop digital multi-phase buck controller designed for CPU voltage regulation and is fully compliant with AMD SVI1 & SVI2 Rev 1.06 and Intel VR12 Rev 1.5 PWM specification and VR12.5 Rev 1.3 PWM specification. The IR3564B/70B includes IR’s Efficiency Shaping Technology to deliver exceptional efficiency at minimum cost across the entire load range. IR’s Dynamic Phase Control adds/drops active phases based upon load current and can be configured to enter 1-phase operation and diode emulation mode automatically or by command. IR’s unique Adaptive Transient Algorithm (ATA), based on proprietary non-linear digital PWM algorithms, minimizes output bulk capacitors and Multiple Time Programmable (MTP) storage saves pins and enables a small package size. Device configuration and fault parameters are easily defined using the IR Digital Power Design Center (DPDC) GUI and stored in on-chip MTP. The IR3564B/70B provides extensive OVP, UVP, OCP and OTP fault protection and includes thermistor based temperature sensing with VRHOT signal. The IR3564B/70B includes numerous features like register diagnostics for fast design cycles and platform differentiation, simplifying VRD design and enabling fastest time-to-market (TTM) with “set-and-forget” methodology.

• Dual output 4+1 and 3+2 phase PWM Controllers
• Easiest layout and fewest pins in the industry
• Fully supports AMD® SVI1 & SVI2 with dual OCP and Intel® VR12 & VR12.5
• Complies with VR12.5 Rev 1.3 requirement for SVID register 15h to have <200 µSecfilter
• Overclocking & Gaming Mode
• Switching frequency from 200kHz to 2MHz per phase
• IR Efficiency Shaping Features including Dynamic Phase Control and Automatic Power State Switching
• IR Adaptive Transient Algorithm (ATA) on both loops minimizes output bulk capacitors and system cost
• Auto-Phase Detection with auto-compensation
• Per-Loop Fault Protection: OVP, UVP, OCP, OTP
• I2C/SMBus/PMBus system interface for telemetry of Temperature, Voltage, Current & Power for both loops
• Multiple Time Programming (MTP) with integrated charge pump for easy custom configuration
• Compatible with IR ATL and 3.3V tri-state Drivers
• +3.3V supply voltage; -40°C to 85°C ambient operation
• Pb-Free, Halogen Free, RoHS, 5x5mm, 40-pin, 0.4mm pitch QFN