DESCRIPTION

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

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

· Compliant with Intel® VR12 and AMD® SVI/PVI standards on both loops.

· Features Vtt tracking for DDR memory.

· Incorporates IR Efficiency Shaping Technology for high efficiency across all load ranges.

· 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.

· Offers extensive fault protection: OVP, UVP, OCP, OTP.

· Includes I2C/PMBus interface for communication with up to 16 VR loops.

· Configuration and fault parameters are manageable via IR Intuitive Power Designer (DPDC) GUI.

· Features NVM storage for custom configurations, reducing pin count and package size.

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.

· Programmable for 1-phase or 2-phase operation at light loads.

· Auto-Phase Detection with auto-compensation.

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

· I2C/SMBus/PMBus system interface for telemetry.

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

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

· Operates at +3.3V supply voltage; -20ºC to 85ºC ambient temperature.

· Available in Pb-Free, RoHS compliant, 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.