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, featuring Vtt tracking for DDR memory.

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

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

· Includes IR’s Adaptive Transient Algorithm (ATA) to minimize output bulk capacitors.

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

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

· Utilizes NVM for device configuration and fault parameters, enabling a compact package design.

FEATURES

· 6-phase & 8-phase dual output PWM Controller with flexible phase assignment.

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

· Features Overclocking & Gaming Mode with Vmax setting.

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

· Programmable 1-phase or 2-phase operation for light loads and active diode emulation for very light loads.

· Auto-Phase Detection with auto-compensation and per-loop fault protection (OVP, UVP, OCP, OTP, CFP).

· I2C/SMBus/PMBus system interface for telemetry of temperature, voltage, current, and power.

· Non-Volatile Memory (NVM) for custom configuration and compatible with IR ATL and 3.3V Tri-state Drivers.

APPLICATIONS

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

· DDR Memory with Vtt tracking.

· Overclocked & Gaming platforms.