CHL8325B-00CRT International Rectifier, CHL8325B-00CRT Datasheet

CHL8325B-00CRT

Manufacturer Part Number

CHL8325B-00CRT

Description

Dual Loop, 4+1 multiphase VR12/AMD PWM controller for high efficiency, highly accurate VR solutions

Manufacturer

International Rectifier

Datasheet

1.IR3541MTRPBF.pdf (2 pages)

Specifications of CHL8325B-00CRT

Controller

CPU

Overclocking

Yes

Auto-psi/dpc

Yes

Vgd

Yes

Voltage Outputs (#)

Phases (#)

Typical Configuration

4 + 1 Multiphase

I2c

Yes

Smbus

Yes

Pmbus

Yes

Package

QFN 6 x 6

Current page: 1 of 2
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FEATURES

APPLICATIONS

 5-phase dual output PWM Controller

 Phases are flexibly assigned between Loops 1 & 2

 Intel® VR12, AMD® 400kHz & 3.4MHz SVI and

 Dual OCP support for I-spike enhanced AMD CPUs

 SMB_Alert Pin for Servers

 PMBus Address pin or Variable Gate Drive

 2

 Overclocking & Gaming Mode with Vmax setting

 Switching frequency from 200kHz to 1.2MHz per

 IR Efficiency Shaping Features including Variable

 Programmable 1-phase or 2-phase for Light Loads

 IR Adaptive Transient Algorithm (ATA) on both

 Auto-Phase Detection with auto-compensation

 Per-Loop Fault Protection: OVP, UVP, OCP,

 I2C/SMBus/PMBus system interface for telemetry

 Non-Volatile Memory (NVM) for custom

 Compatible with IR ATL and 3.3V Tri-state Drivers

 +3.3V supply voltage; -20ºC to 85ºC ambient

 Pb-Free, RoHS, 6x6 40-pin QFN package

 Intel ® VR12 & AMD® SVI based systems

 DDR Memory with Vtt tracking

 Overclocked & Gaming platforms

Memory modes

(IR3541/CHL8325A)

(CHL8325B)

phase

Gate Drive (IR3541/CHL8325A only) and Dynamic

Phase Control

and Active Diode Emulation for Very Light Loads

loops minimizes output bulk capacitors and

system cost

OTP, CFP

of Temperature, Voltage, Current & Power for

both loops

configuration

operation

Temperature Sense for VR12 Desktop

November 28, 2011 | FINAL | V1.04

Digital Multi-Phase Buck Controller

DESCRIPTION

The IR3541 and CHL8325A/B are dual-loop digital

multi-phase buck controllers that drive up to 5 phases.

The IR3541 and CHL8325A/B are fully Intel® VR12 and AMD®

SVI compliant on both loops and provides a Vtt tracking

function for DDR memory.

NVM storage saves pins and enables a small package size.

The IR3541 and CHL8325A/B 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 as a function

of real-time load current. IR Dynamic Phase Control

adds/drops active phases based upon load current.

The IR3541 and CHL8325A/B can be configured to enter

1-phase 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

IR3541 and CHL8325A/B 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 IR3541 and CHL8325A/B 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: IR3541 Package Top View

CHL8325A/B

IR3541

Related parts for CHL8325B-00CRT

CHL8325B-00CRT Summary of contents

Page 1

... PMBus Address pin or Variable Gate Drive (IR3541/CHL8325A)  Temperature Sense for VR12 Desktop (CHL8325B)  Overclocking & Gaming Mode with Vmax setting  Switching frequency from 200kHz to 1.2MHz per phase  IR Efficiency Shaping Features including Variable Gate Drive (IR3541/CHL8325A only) and Dynamic Phase Control  ...

Page 2

... Figure 3: CHL8325A/B Package Top View, Enlarged IR3541 CHL8325A/B Part Number Programming 1 IR3541MTRPBF Unprogrammed 1 IR3541MPBF Unprogrammed Customer 2 IR3541MxxyyTRP Configuration Customer 2 IR3541MxxyyP Configuration Part Number 3000 CHL8325A-00CRT 3000 CHL8325A-xxCRT 3000 CHL8325B-00CRT 3000 CHL8325B-xxCRT RCSP_L2 29 RCSM_L2 28 VCC 27 VSEN_L2 CHL8325A/B 26 VRTN_L2 40 Pin 6x6 QFN ...

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