IR3538A Datasheet | International Rectifier

Digital Multi-Phase Buck Controller IR3536A IR3538A Features - 6-phase & 8-phase dual output PWM Controller - Phases are flexibly assigned between Loops 1 & 2 - Intel® VR12, AMD® 3.4MHz SVI/PVI & Memory modes - Overclocking & Gaming Mode with Vmax setting - Switching frequency from 200k Hz 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) on both loops minimizes output bulk capacitors and system cost - Auto-Phase Detection with auto-pensation - 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 - patible with IR ATL and 3.3V Tri-state Drivers - +3.3V supply voltage; -20ºC to 85ºC ambient operation - Pb-Free, Ro HS, 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 DESCRIPTION The IR3536A and IR3538A are dual-loop digital multi-phase buck controllers. The IR3536A drive up to 6 phases and the IR3538A drives up to 8 phases. The IR3536A and IR3538A are fully Intel® VR12 and AMD® SVI/PVI pliant on both loops and provide a Vtt tracking function for DDR memory. The IR3536A and IR3538A include the IR Efficiency Shaping Technology to deliver exceptional efficiency at minimum cost across the entire load range. IR Variable Gate Drive optimizes the MOSFET gate drive voltage based on real-time load current. IR Dynamic Phase Control adds/drops phases based upon load current. The IR3536A and IR3538A can be configured to enter 1phase operation and active diode emulation mode automatically or by mand. IR’s unique Adaptive Transient Algorithm (ATA), based on proprietary non-linear digital PWM algorithms,...