Digital Multi-Phase Buck Controller CHL8225G/8G FEATURES DESCRIPTION 5-phase & 8-phase dual output PWM Controller The CHL8225G/8G are dual-loop, digital multi-phase buck with phases flexibly assigned between Loops 1 & 2 controllers. The CHL8225G drives up to 5 phases and the CHL8228G drives up to 8 phases. They feature Input Dynamic voltage control by 2-bit parallel interface Voltage Management allowing up to 3 input voltages to be with Gamer Mode override and Vmax setting monitored to ensure adequate power is delivered to the Input Voltage Management for up to 3 Input load. Dynamic voltage control is provided by 4 registers Voltages which are programmed through I2C/SMBus/PMBus and ICRITICAL Monitor and Phase Current Capture Mode then selected using a 2-bit parallel bus for fast access. Phase Switching frequency from 200kHz to 1.2MHz The CHL8225G/8G includes the IR Efficiency Shaping IR Efficiency Shaping Features including Variable Technology to deliver exceptional efficiency at minimum Gate Drive, Dynamic Phase Control cost across the entire load range. IR Variable Gate Drive optimizes the MOSFET gate drive voltage as a function of Programmable 1-phase or 2-phase for Light Loads real-time load current. IR Dynamic Phase Control adds and and Active Diode Emulation for Very Light Loads drops phases based upon load current. The CHL8225G/8G IR Adaptive Transient Algorithm (ATA) minimizes can be configured to enter 1-phase operation and active output bulk capacitors and system cost diode emulation based upon load current or by command. Per-Loop Fault Protection: OVP, UVP, OCP, OTP IRs unique Adaptive Transient Algorithm (ATA), based on I2C/SMBus/PMBus system interface for telemetry of proprietary non-linear digital PWM algorithms, minimizes Temperature, Voltage, Current & Power for both output bulk capacitors. loops The I2C/PMBus interface can communicate with up to 16 Non-Volatile Memory (NVM) for custom CHL8225G/8G-based VR loops. Device configuration and configuration fault parameters are defined using the IR Digital Power Compatible with IR ATL and 3.3V tri-state Drivers Design Center (DPDC) GUI and stored in on-chip NVM. +3.3V supply voltage 0C to 85C ambient The CHL8225G/8G provides extensive OVP, UVP, OCP and operation OTP fault protection and includes thermistor based Pb-Free, RoHS, 6x6 40-pin & 8x8 56-pin QFN, MSL2 temperature sensing with VRHOT signal. The CHL8225G/8G package includes numerous features like register diagnostics for fast design cycles and platform differentiation, simplifying APPLICATIONS VRD design and enabling fastest time-to-market with its set-and-forget methodology. Multiphase GPU systems PIN DIAGRAM 56 55 54 53 52 51 50 49 48 47 46 45 44 43 ISEN8 1 42 ISEN7 RCSP 2 41 RCSP L2 40 39 38 37 36 35 34 33 32 31 RCSM 3 40 RCSM L2 1 30 RCSP RCSP L2 VCC 4 39 VCC RCSM 2 29 RCSM L2 5 38 VRHOT2 VSEN L2 VCC 3 28 VCC VSEN 6 37 VRTN L2 4 27 VSEN L2 VSEN 7 CHL8228G 36 PWM8 VRTN 56 Pin 8x8 QFN CHL8225G VRTN 5 26 VRTN L2 RRES 8 35 PWM7 Top View 40 Pin 6x6 QFN 9 34 6 25 PWM5 TSEN PWM6 RRES Top View V18A 10 33 PWM5 7 24 PWM4 TSEN 11 32 VR READY L1 PWM4 V18A 8 23 PWM3 VR READY L2 12 31 PWM3 9 22 PWM2 VR READY L1 41 GND EN L2 13 30 PWM2 PWM1 57 GND VR READY L2 10 21 VINSEN 14 29 PWM1 11 12 13 14 15 16 17 18 19 20 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Figure 1: CHL8225G Package Top View Figure 2: CHL8228G Package Top View 1 June 21, 2013 FINAL V1.12 VINSEN IRTN1 VINSEN AUX1 ISEN1 VIDSEL L2 IRTN2 VIDSEL1 ISEN2 VIDSEL0 IRTN3 ISEN3 VRHOT ICRIT IRTN4 ENABLE ISEN4 SMB DIO SMB CLK IRTN5 ISEN5 VAR GATE VINSEN AUX1 IRTN8 VINSEN AUX2 IRTN1 VIDSEL0 L2 ISEN1 VIDSEL1 IRTN2 VIDSEL0 ISEN2 VRHOT ICRIT IRTN3 ENABLE ISEN3 VIDSEL1 L2 IRTN4 SMB DIO ISEN4 SMB CLK IRTN5 VBOOT ISEN5 IRTN6 VMAX TSEN2 ISEN6 VAR GATE IRTN7Digital Multi-Phase Buck Controller CHL8225G/8G ORDERING INFORMATION CHL822 G Package Packing Qty Part Number T=3000 CHL8225G-00CRT QFN T Tape & Reel / TY - Tray TY=4900 CHL8225G-00CRTY 1 CHL8225G-xxCRT QFN T=3000 R Package Type (QFN) T=3000 CHL8228G-00CRT QFN C Operating Temperature TY=2600 CHL8228G-00CRTY (Commercial Standard) 1 QFN T=3000 CHL8228G-xxCRT xx Configuration File Notes: 1. xx indicates customer specific configuration file. Part Number 5: CHL8225G 8: CHL8228G 56 55 54 53 52 51 50 49 48 47 46 45 44 43 1 42 ISEN7 ISEN8 40 39 38 37 36 35 34 33 32 31 2 41 RCSP RCSP L2 1 30 RCSP RCSP L2 3 40 RCSM RCSM L2 4 39 VCC VCC RCSM 2 29 RCSM L2 5 38 VRHOT2 VSEN L2 VCC 3 28 VCC 6 37 VSEN VRTN L2 4 27 VSEN L2 VSEN 7 CHL8228G 36 PWM8 VRTN CHL8225G 56 Pin 8x8 QFN 5 26 VRTN L2 VRTN 8 35 RRES PWM7 Top View 40 Pin 6x6 QFN RRES 6 25 PWM5 TSEN 9 34 PWM6 Top View V18A 10 33 PWM5 7 24 PWM4 TSEN VR READY L1 11 32 PWM4 8 23 PWM3 V18A VR READY L2 12 31 PWM3 9 22 PWM2 VR READY L1 EN L2 13 30 PWM2 41 GND 57 GND PWM1 VR READY L2 10 21 VINSEN 14 29 PWM1 11 12 13 14 15 16 17 18 19 20 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Figure 4: CHL8228G Top View Enlarged Figure 3: CHL8225G Top View Enlarged 2 June 21, 2013 FINAL V1.12 VINSEN IRTN1 VINSEN AUX1 ISEN1 IRTN2 VIDSEL L2 VIDSEL1 ISEN2 IRTN3 VIDSEL0 VRHOT ICRIT ISEN3 IRTN4 ENABLE ISEN4 SMB DIO IRTN5 SMB CLK ISEN5 VAR GATE VINSEN AUX1 IRTN8 VINSEN AUX2 IRTN1 VIDSEL0 L2 ISEN1 VIDSEL1 IRTN2 VIDSEL0 ISEN2 VRHOT ICRIT IRTN3 ENABLE ISEN3 VIDSEL1 L2 IRTN4 SMB DIO ISEN4 SMB CLK IRTN5 VBOOT ISEN5 VMAX IRTN6 TSEN2 ISEN6 VAR GATE IRTN7