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CHL8326-XXCRT Datasheet(PDF) 1 Page - International Rectifier |
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CHL8326-XXCRT Datasheet(HTML) 1 Page - International Rectifier |
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1 / 3 page  June 21, 2013 | FINAL | V1.09 1 Digital Multi-Phase Buck Controller IR3536/38 CHL8326/28 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 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) on both loops 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 PIN DIAGRAM 49 GND CHL8326 48 Pin 7x7 QFN Top View 1 2 7 8 5 6 3 4 10 9 12 11 36 35 30 29 32 31 34 33 27 28 25 26 47 43 45 40 46 42 44 39 41 48 38 37 14 18 16 21 15 19 17 22 20 13 23 24 PWM5 VRTN RCSM PWM6 VSEN PWM4 VR_READY 1 / PWRGD 2 RCSP TSEN PWM3 VINSEN V18A RRES VCC PWM2 PWM1 RCSM_L2 RCSP_L2 CFP 1 / VFIXEN_PSI 2 VR_READY_L2 1 / PWROK 2 VCC VAR_GATE VRTN_L2 VSEN_L2 Figure 1: IR3536/CHL8326 Package Top View DESCRIPTION The IR3536/CHL8326 and IR3538/CHL8328 are dual-loop digital multi-phase buck controllers. The IR3536/CHL8326 drive up to 6 phases and the IR3538/CHL8328 drives up to 8 phases. The IR3536/CHL8326 and IR3538/CHL8328 are fully Intel® VR12 and AMD® SVI/PVI compliant on both loops and provide a Vtt tracking function for DDR memory. The IR3536/CHL8326 and IR3538/CHL8328 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 IR3536/CHL8326 and IR3538/CHL8328 can be configured to enter 1-phase operation and active diode emulation mode automatically or by command. IR’s unique Adaptive Transient Algorithm (ATA), based on proprietary non-linear digital PWM algorithms, minimizes output bulk capacitors. The I2C/PMBus interface can communicate with up to 16 IR3536/CHL8326 and IR3538/CHL8328 based VR loops. Device configuration and fault parameters are easily defined using the IR Intuitive Power Designer (DPDC) GUI and stored in on-chip NVM. The IR3536/CHL8326 and IR3538/CHL8328 provides extensive OVP, UVP, OCP and OTP fault protection and includes thermistor based temperature sensing with VR_HOT signal. NVM storage saves pins and enables a small package size. The IR3536/CHL8326 and IR3538/CHL8328 also include numerous features like register diagnostics for fast design cycles and platform differentiation, truly simplifying VRD design and enabling fastest time-to-market with its “set-and-forget” methodology. PWM5 VRTN RCSM PWM6 VSEN PWM4 VR_READY 1 / PWRGD 2 RCSP TSEN PWM3 VINSEN V18A RRES VCC PWM2 PWM1 RCSM_L2 RCSP_L2 CFP 1 / VFIXEN_PSI 2 VR_READY_L2 1 / PWROK 2 VCC PWM7 VRTN_L2 VSEN_L2 57 GND CHL8328 56 Pin 8x8 QFN Top View 55 51 53 48 54 50 52 47 49 56 46 45 43 44 1 2 7 8 5 6 3 4 10 9 12 11 14 13 16 20 18 23 17 21 19 24 22 15 25 26 28 27 42 41 36 35 38 37 40 39 33 34 31 32 29 30 ISEN8 GPO_B PWM8 ISEN7 1Intel/MPoL mode 2AMD mode Figure 2: IR3538/CHL8328 Package Top View |
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