DATASHEET ISL6265C FN6976 Rev 2.00 Multi-Output Controller with Integrated MOSFET Drivers for AMD SVI Capable January 11, 2013 Mobile CPUs The ISL6265C is a multi-output controller with embedded gate Features drivers. A single-phase controller powers the Northbridge Core Configuration Flexibility (VDDNB) portion of the CPU. The two remaining controller channels can be configured for two-phase or individual - Dual Plane, Single-Phase Controllers single-phase outputs. For uniplane CPU applications, the - Uniplane, Two-Phase Controller ISL6265C is configured as a two-phase buck converter. This Precision Voltage Regulators allows the controller to interleave channels to effectively double - 0.5% System Accuracy Over-temperature the output voltage ripple frequency, and thereby reduce output voltage ripple amplitude with fewer components, lower Voltage Positioning with Adjustable Load Line and Offset component cost, reduced power dissipation, and smaller area. Internal Gate Drivers with 2A Driving Capability For dual-plane processors, the ISL6265C can be configured as independent single-phase controllers powering VDD0 and Differential Remote CPU Die Voltage Sensing VDD1. Core Differential Current Sensing: DCR or Resistor 3 The heart of the ISL6265C is the patented R Technology, Northbridge Lossless r Current Sensing DS(ON) Intersils Robust Ripple Regulator modulator. Compared with 3 Serial VID Interface the traditional buck regulator, the R Technology has a faster 3 - Two Wire Clock and Data Bus transient response. This is due to the R modulator 2 commanding variable switching frequency during a load - Supports High-Speed I C transient. - 0.500V to 1.55V in 12.5mV Steps - Supports PSI L Power-Saving Mode The Serial VID Interface (SVI) allows dynamic adjustment of the Core and Northbridge output voltages independently and in Core Outputs Feature Phase Shedding with PSI L combination from 0.500V to 1.55V. Core and Northbridge Adjustable Output-Voltage Offset output voltages achieve a 0.5% system accuracy over-temperature. Digital Soft-Start of all Outputs A unity-gain differential amplifier is provided for remote CPU User Programmable Switching Frequency die sensing. This allows the voltage on the CPU die to be Static and Dynamic Current Sharing (Uniplane Core) accurately regulated per AMD mobile CPU specifications. Core Overvoltage, Undervoltage, and Overcurrent Protection output current sensing is realized using lossless inductor DCR Pb-Free (RoHS compliant) sensing. All outputs feature overcurrent, overvoltage and undervoltage protection. Applications Related Literature AMD Griffin Platform CPU See FN6884 for Multi-Output Controller with Integrated Notebook Core/GPU Voltage Regulators MOSFET Drivers for AMD SVI Capable Mobile CPUs POWER STAGE CORE 0 CORE 1 POWER ISL6265C STAGE POWER STAGE FIGURE 1. SIMPLIFIED SYSTEM DIAGRAM FN6976 Rev 2.00 Page 1 of 27 January 11, 2013 NORTHBRIDGEISL6265C Functional Block Diagram RTN NB COMP NB VSEN NB FB NB FSET NB PVCC I FSET NB VNB BOOT NB 1 3.0k FLT UGATE NB 1.5k SVC MOSFET PHASE NB NO DROOP DRIVER MODULATOR E/A SVD PSI L NB SHOOT-THRU LGATE NB I OFS PROTECTION PWROK VREF NB VREF NB DE MODE PGND NB VREF0 VIN VREF1 OFS/FIXEN PSI L PVCC VCC POWER-ON ENABLE RESET AND OCSET NB FLT SOFT-START PGOOD VNB LOGIC FAULT RTN1 OCSET V0 PROTECTION GND V1 RBIAS ISEN0 ISEN1 MODE VIN VW0 PVCC I VW0 COMP0 BOOT0 FB0 FLT E/A UGATE0 I OFS MOSFET PHASE0 DRIVER VDIFF0 VREF0 SHOOT-THRU LGATE0 V0 VIN PROTECTION VSEN0 1 DE MODE PGND0 RTN0 NO MODE DROOP ISEN0 MODULATOR PSI L ISP0 CORE CURRENT PVCC SENSE ISN0 FLT MODE CURRENT ISEN1 BALANCE BOOT1 ISP1 UGATE1 CURRENT NO DROOP SENSE ISN1 MOSFET PHASE1 DRIVER MODE V1 VSEN1 SHOOT-THRU LGATE1 1 VREF1 PROTECTION RTN1 DE MODE PGND1 E/A VDIFF1 I OFS PSI L I VW1 FB1 COMP1 VW1 FIGURE 2. SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM OF ISL6265C FN6976 Rev 2.00 Page 2 of 27 January 11, 2013 SVI INTERFACE AND DAC 1.5kW