CHL8318-20-00CRT International Rectifier, CHL8318-20-00CRT Datasheet

CHL8318-20-00CRT

Manufacturer Part Number

CHL8318-20-00CRT

Description

8 phase VR11.1 low temperature multiphase PWM controller for high efficiency solutions

Manufacturer

International Rectifier

Datasheet

1.CHL8318-20-00CRT.pdf (2 pages)

Specifications of CHL8318-20-00CRT

Controller

CPU

Overclocking

Yes

Auto-psi/dpc

Yes

Vgd

Yes

Voltage Outputs (#)

Phases (#)

Typical Configuration

8 Multiphase

I2c

Smbus

Yes

Pmbus

Package

QFN 8 x 8

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FEATURES

APPLICATIONS

BASIC APPLICATION

 Intel VR11.x compliant Digital PWM Controller

 Programmable 1-phase to 8-phase operation

 Customized Digital Over-Clocking features an

 IR Efficiency Shaping features a Variable Gate Drive

 1-phase to 4-phase PSI for Light Loads

 Adaptive Transient Algorithm minimizes capacitors

 Designed for use with coupled inductors

 Enables Thermal Phase Balancing

 SMBus Fault Indicators: OVP, UVP, OCP, OTP

 SMBus interface for configuring and monitoring;

 Compatible with IR ATL Drivers and tri-state Drivers

 9 bytes of NVM storage available for customer use

 +3.3V supply voltage; 0ºC to 85ºC Ambient

 RoHS Compliant, MSL level 1 package

 Intel® VR11.x CPU VRD and VRM; DDR Memory

 High Performance Desktops and Servers

 Over-clocking and High-Efficiency Application

easy-to-use SMBus Gamer command and a

Gamer VID control up to 2.3V, Gamer Vmax,

VID Override or Track, Digital Load-Line Adjust,

Gamer OC/OVP, Gamer OFF pin and Gamer OTP

and Dynamic Phase Control

SMBus commands include monitoring input

current and power

operation

Figure 1: CHL8318-20 Basic Application Circuit

September28, 2011 | FINAL | V1.02

Digital Multi-Phase Buck Controller

DESCRIPTION

The CHL8318-20 is an 8-phase digital synchronous buck

controller for core regulation of high-performance Intel

VR11.1 and VR11.0 platforms. The CHL8318-20 is fully

compliant with VR11.1 including Power Status Indicator

(PSI) and for improved light load efficiency and accurate

current output (IMON).

The IR CHL8318-20 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” to extend

VID up to 2.3V with 6.25 mV resolution.

The CHL8318-20 deploys a number of efficiency shaping

features such as variable MOSFET gate drive versus load,

programmable PSI modes for optimum light-load along

with programmable phase shedding to autonomously

add/drop phases versus load.

CHL8318-20 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 CHL8318-20 provides extensive OVP, UVP, OCP and

OTP fault protection. Device and fault configuration

parameters are easily defined using the IR Power Designer

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 CHL8318-20 based

VRs. The controller includes a unique sensorless and

lossless input current monitoring capability.

PIN DIAGRAM

GAMER_OFF

VINSEN

TSEN1

TSEN2

TSEN3

SADDR/

RCSM

RCSP

VCPU

RRES

Figure 2: CHL8318-20 Package Top View

VRTN

IMON

V18A

VCC

CHL8318-20

8mmx8mm

TOP VIEW

56 Pin

GND

QFN

48 47 46 45

CHL8318-20

44 43

IRTN8

ISEN8

VCC

PWM8

PWM7

PWM6

PWM5

PWM4

PWM3

PWM2

PWM1

VCC

VAR_GATE

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CHL8318-20-00CRT Summary of contents

Page 1

... VR11.1 including Power Status Indicator (PSI) and for improved light load efficiency and accurate current output (IMON). The IR CHL8318-20 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” to extend VID ...

Page 2

... CHL8318- Pin 7 8mmx8mm QFN 8 TOP VIEW 9 10 GND Figure 3: CHL8318-20 Top View Enlarged CHL8318-20 Tape & Reel Qty Part Number 3000 CHL8318-20-00CRT 3000 CHL8318-20-xxCRT IRTN8 41 ISEN8 40 VCC 39 PWM8 38 PWM7 37 PWM6 36 PWM5 35 PWM4 34 PWM3 33 PWM2 ...

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