IR3536A Digital Multi-Phase Buck Controller IR3538A FEATURES DESCRIPTION 6-phase & 8-phase dual output PWM Controller The IR3536A and IR3538A are dual-loop digital multi-phase buck controllers. The IR3536A drive up to 6 phases and the Phases are flexibly assigned between Loops 1 & 2 IR3538A drives up to 8 phases. The IR3536A and IR3538A Intel VR12, AMD 3.4MHz SVI/PVI & Memory are fully Intel VR12 and AMD SVI/PVI compliant on both modes loops and provide a Vtt tracking function for DDR memory. Overclocking & Gaming Mode with Vmax setting The IR3536A and IR3538A include the IR Efficiency Switching frequency from 200kHz to 1.2MHz per Shaping Technology to deliver exceptional efficiency at phase minimum cost across the entire load range. IR Efficiency Shaping Features including Variable IR Variable Gate Drive optimizes the MOSFET gate drive Gate Drive and Dynamic Phase Control voltage based on real-time load current. IR Dynamic Phase Control adds/drops phases based upon load current. Programmable 1-phase or 2-phase for Light Loads The IR3536A and IR3538A can be configured to enter 1- and Active Diode Emulation for Very Light Loads phase operation and active diode emulation mode IR Adaptive Transient Algorithm (ATA) on both loops automatically or by command. minimizes output bulk capacitors and system cost Auto-Phase Detection with auto-compensation IRs unique Adaptive Transient Algorithm (ATA), based on proprietary non-linear digital PWM algorithms, minimizes Per-Loop Fault Protection: OVP, UVP, OCP, OTP, CFP output bulk capacitors. I2C/SMBus/PMBus system interface for telemetry of Temperature, Voltage, Current & Power for The I2C/PMBus interface can communicate with up to 16 both loops IR3536A and IR3538A based VR loops. Device Non-Volatile Memory (NVM) for custom configuration and fault parameters are easily defined using configuration the IR Intuitive Power Designer (DPDC) GUI and stored in on-chip NVM. Compatible with IR ATL and 3.3V Tri-state Drivers +3.3V supply voltage -20C to 85C ambient The IR3536A and IR3538A provides extensive OVP, UVP, operation OCP and OTP fault protection and includes thermistor Pb-Free, RoHS, 7x7 48-pin & 8x8 56-pin QFN, MSL2 based temperature sensing with VR HOT signal. package NVM storage saves pins and enables a small package size. The IR3536A and IR3538A also include numerous features APPLICATIONS like register diagnostics for fast design cycles and platform differentiation, truly simplifying Intel VR12 & AMD SVI & PVI based systems VRD design and enabling fastest time-to-market with its DDR Memory with Vtt tracking set-and-forget methodology. Overclocked & Gaming platforms PIN DIAGRAM Figure 1: IR3536A Package Top View Figure 2: IR3538A Package Top View 1 June 21, 2013 FINAL V1.09 IR3536A Digital Multi-Phase Buck Controller IR3538A ORDERING INFORMATION IR353AM Packing Package Part Number Programming Qty P/PBF Lead Free TR=3000 IR3536AMTRPBF QFN Default TR Tape & Reel / TY - Tray TY=2600 IR3536AMTYPBF TR=3000 IR3538AMTRPBF yy Configuration File ID QFN Default TY=2600 IR3538AMTYPBF 1 xx Customer ID QFN TR=3000 IR3536AMxxyyTRP Customer Configuration 1 QFN TR=3000 IR3538AMxxyyTRP Customer Configuration Package Type (QFN) Notes: Part 1. Customer Specific Configuration File, where 6: IR3536A 8: IR3538A xx = Customer ID and yy = Configuration File (Codes assigned by IR Marketing). Figure 3: IR3536A Package Top View, Enlarged Figure 4: IR3538A Package Top View, Enlarged 2 June 21, 2013 FINAL V1.09