IR3536AMTRPBF

Digital Multi-Phase Buck Controller FEATURES IR3536A IR3538A DESCRIPTION  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 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 compliant on both loops and provide a Vtt tracking function for DDR memory.  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 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 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 IR3536A and IR3538A 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 IR3536A and IR3538A 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 IR3536A and IR3538A 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. PIN DIAGRAM Figure 1: IR3536A Package Top View 1 June 21, 2013 | FINAL | V1.09 Figure 2: IR3538A Package Top View Digital Multi-Phase Buck Controller IR3536A IR3538A ORDERING INFORMATION IR353AM          Package Packing Qty Part Number QFN TR=3000 TY=2600 IR3536AMTRPBF IR3536AMTYPBF Default yy – Configuration File ID QFN TR=3000 TY=2600 IR3538AMTRPBF IR3538AMTYPBF Default xx – Customer ID QFN TR=3000 IR3536AMxxyyTRP P/PBF – Lead Free TR – Tape & Reel / TY - Tray Package Type (QFN) Part – 6: IR3536A 8: IR3538A Figure 3: IR3536A Package Top View, Enlarged 2 June 21, 2013 | FINAL | V1.09 QFN TR=3000 Programming 1 1 IR3538AMxxyyTRP Customer Configuration Customer Configuration Notes: 1. Customer Specific Configuration File, where xx = Customer ID and yy = Configuration File (Codes assigned by IR Marketing). Figure 4: IR3538A Package Top View, Enlarged IR3536A IR3538A Digital Multi-Phase Buck Controller FUNCTIONAL BLOCK DIAGRAM V18A RCSP_L2 VCC VID_2 RSCM_L2 1.8V AFE_2 LDO VSEN_L2 VRTN_L2 ITOT_2 RCSP Vout1_Error Voltage ADC PWM1 RSCM Vout2_Error AFE_1 PWM2 VSEN VID_1 VRTN PWM3 PWM4 ISEN1 Mode Control IRTN1 . . . ISENx . . . IP1 . . . PWM5 Control and Monitoring IPx IRTNx IR3536/ IR3538/ CHL8326 CHL8326 CHL8328 3 4 4 5 6 8 PWM Generator Σ Phase_ Period_1 Phase_ Period_2 ITOT_1 PWM7 x y z PWM8 Iout ISENy IRTNy . . . ISENz . . . IRTNz Vin IPy . . . IPz PWM6 ITOT_2 Only for CHL8328 IR3538A VAR_GATE Vout Temp Σ Current ADC Fault Bus System Clock IP1 . . . IP6 Only for IR3538/ CHL8328 System Clock IP7 . . . IP8 ADC Clocks MUX Clocks 1 Intel/MPoL mode AMD mode 2 Phase_Period_1 TSEN2 Phase_Period_2 VID_1 TSEN VID_2 VINSEN Monitor ADC V3_3 EN SV_CLK1/SVC_VID[3]2 SV_DIO1/SVD_VID[2]2 SV_ALERT#1/VID[4]2 Reference, Oscillator, State Control, Interfaces, Registers and NVM Iout Vin Temp Fault Bus VR_HOT#1/ VRHOT_ICRIT#2 SMB_DIO SMB_CLK SMB_ALERT VR_READY1/PWRGD2 VR_READY_L21/ PWROK2 GPO_A Only for GPO_B CHL8328 IR3538A PSI1/VID[5]2 SV_ADDR1/VID[1]2 PM_ADDR1/ PM_ADDR_VID[0]2 CFP1/VFIXEN_PSI2 RRES Figure 5: IR3536A / IR3538A Functional Block Diagram 3 June 21, 2013 | FINAL | V1.09