DESCRIPTION

· The IR3536/CHL8326 and IR3538/CHL8328 are dual-loop digital multi-phase buck controllers.

· IR3536/CHL8326 drives up to 6 phases; IR3538/CHL8328 drives up to 8 phases.

· Fully compliant with Intel® VR12 and AMD® SVI/PVI standards.

· Features Vtt tracking for DDR memory and IR Efficiency Shaping Technology.

· Includes IR Variable Gate Drive and Dynamic Phase Control for optimized performance.

· Supports 1-phase operation and active diode emulation mode.

· Utilizes Adaptive Transient Algorithm (ATA) to minimize output bulk capacitors.

· I2C/PMBus interface supports up to 16 VR loops.

· Offers extensive fault protection including OVP, UVP, OCP, and OTP.

· Includes thermistor-based temperature sensing with VR_HOT signal.

· NVM storage enables small package size and simplified VRD design.

FEATURES

· 6-phase & 8-phase dual output PWM Controller.

· Flexible phase assignment between Loops 1 & 2.

· Supports Intel® VR12, AMD® 3.4MHz SVI/PVI & Memory modes.

· Overclocking & Gaming Mode with Vmax setting.

· Switching frequency from 200kHz to 1.2MHz per phase.

· IR Efficiency Shaping Features including Variable Gate Drive and Dynamic Phase Control.

· Programmable 1-phase or 2-phase for Light Loads and Active Diode Emulation for Very Light Loads.

· IR Adaptive Transient Algorithm (ATA) minimizes output bulk capacitors and system cost.

· Auto-Phase Detection with auto-compensation.

· Per-Loop Fault Protection: OVP, UVP, OCP, OTP, CFP.

· I2C/SMBus/PMBus system interface for telemetry of Temperature, Voltage, Current & Power for both loops.

· Non-Volatile Memory (NVM) for custom configuration.

· Compatible with IR ATL and 3.3V Tri-state Drivers.

· +3.3V supply voltage; -20ºC to 85ºC ambient operation.

· Pb-Free, RoHS, 7x7 48-pin & 8x8 56-pin QFN, MSL2 package.

APPLICATIONS

· Intel® VR12 & AMD® SVI & PVI based systems.

· DDR Memory with Vtt tracking.

· Overclocked & Gaming platforms.