CHL8318 CHILSEMI | Alldatasheet

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DIGITAL MULTI-PHASE BUCK CONTROLLER Trademarks and registered trademarks are the property of the respective owners. PB0006 Rev. 1.00, October 26, 2009 Page 1 of 4 One Highwood Drive, Tewksbury, MA 01876 www.chilsemi.com © 2009 CHiL Semiconductor Corp. All rights reserved

FEATURES

 Intel VR11.x compliant Digital PWM Controller  Programmable 1-phase to 8-phase operation  Configurable switching frequency from 200 kHz to 1MHz per phase with accuracy better than 2%  Customized Digital Over-Clocking Features o Easy-to-use SMBus Gamer command o Gamer VID control up to 2.3V, Gamer Vmax, VID Override or Track, Digital Load-Line Adjust, Gamer OC/OVP, Gamer OFF pin, Gamer OTP  CHiL Efficiency Shaping Features o Variable Gate Drive o Dynamic Phase Control  1-phase to 4-phase PSI for Light Loads  Adaptive Transient Algorithm minimizes output bulk capacitors  Designed for use with coupled inductors  Enables Thermal Phase Balancing  SMBus Fault Indicators: OVP, UVP, OCP, OTP  SMBus interface for configuring and monitoring; SMBus commands include monitoring input current and power  Compatible with CHiL ATL Drivers and tri-state Drivers  Nine bytes of NVM storage available for customer use  +3.3V supply voltage; 0ºC to 85ºC Ambient operation  RoHS Compliant, MSL level 1 package SDA PWM5 ISEN6 EN VRTN ISEN8RCSM PSI# ISEN5 ISEN4 ISEN3 PWM6 PWM7 PWM8 VID0 VID1 VID2 VID3 VID4 VID5 VID6 VID7 VCPU VCC SCL PWM4 IMON VR_READY IRTN3 IRTN4 IRTN6 IRTN5 RCSP TSEN1 VR_HOT PWM3VINSEN ISEN7 IRTN7 IRTN8 SALERT# V18A RRES NC VCC 48 47 46 45 24 25 26 27 2817 18 19 20 21 22 23 5056 55 54 53 52 51 49 ISEN2 ISEN1 IRTN1 IRTN2 PWM2 PWM1 VAR_GATE TSEN2 TSEN3 15 16 44 43 VCC CHiL CHL8318 GND

56 Pin

GAMER_OFF Figure 1. CHL8318 56 Pin QFN Package

DESCRIPTION

The CHL8318 is a 8-phase digital synchronous buck controller for core regulation of high-performance INTEL® VR11.1 and VR11.0 platforms. The CHL8318 is fully compliant with VR11.1 including Power Status Indicator (PSI) and for improved light load efficiency and accurate current output (IMON). The CHiL CHL8318 includes a customized set of digital over-clocking features which require no external components. Gaming applications can use the SMBus interface to place the VRD into “Gamer Mode”. Gamer Mode features include Extended Gamer VID up to 2.3V with 6.25 mV resolution, Gamer Vmax, CPU VID Override or Track, Digital Load-Line adjust, Gamer OC/OVP and Gamer OFF pin. The CHL8318 deploys a number of efficiency shaping features. The CHL8318 can be configured to optimize MOSFET gate drive versus load current, PSI can be programmed to be up to four phases for optimum light-load efficiency, and the controller can autonomously add/drop phases in low-current and mid-current regions to deliver 90+% efficiency across the entire load range. CHiL’s unique Adaptive Transient Algorithm, based on non- linear digital PWM algorithms, minimizes output bulk capacitors. Coupled inductor mode of operation allows two phase PSI and add/drop of phases which are 180°out of phase for further improvement in transient response and form factor. CHL8318 supports three NTC temperature sensors to report temperature and trigger VR HOT and OTP faults. Digital thermal balancing allows proportional current imbalance between phases. The CHL8318 provides extensive OVP, UVP, OCP and OTP fault protection. Device and fault configuration parameters are easily defined using the CHiL Intuitive Power Designer (IPD) GUI and stored in on-chip non-volatile memory (NVM). The 3-pin SMBus interface can be used to monitor a variety of operating parameters on up to seven CHL8318 based VRs. The controller includes a unique sensorless and lossless input current monitoring capability. The CHL8318 truly simplifies VRD design and enables fastest time-to-market with its “set-and-forget” methodology.

APPLICATIONS

 Intel® VR11.x CPU VRD and VRM; DDR Memory  High Performance Desktops and Servers  Over-clocking and High-Efficiency Applications

Figure 2. Functional Block Diagram

28 VR_HOT

6 SADDR/

15 SALERT#

17 SCL

Figure 3. 8-phase VRD using CHL8318 Controller and CHL8510 MOSFET drivers

DIGITAL MULTI-PHASE BUCK CONTROLLER Page 4 of 4 PB0006 Rev. 1.00, October 26, 2009

ORDERING INFORMATION

CHL8318   

PACKAGE INFORMATION

Package Tape & Reel Qty Part Number QFN 3000 CHL8318CRT Operating Temperature Range C: Commercial Standard Package type R : QFN T: Tape & Reel