IR3538MTRPBF International Rectifier, IR3538MTRPBF Datasheet

IR3538MTRPBF

Manufacturer Part Number

IR3538MTRPBF

Description

Dual Loop, 7+1 multiphase VR12/AMD PWM controller for high efficiency, highly accurate VR solutions

Manufacturer

International Rectifier

Datasheet

1.IR3538MTRPBF.pdf (2 pages)

Specifications of IR3538MTRPBF

Controller

CPU

Overclocking

Yes

Auto-psi/dpc

Yes

Vgd

Yes

Voltage Outputs (#)

Phases (#)

Typical Configuration

7 + 1 Multiphase

I2c

Yes

Smbus

Yes

Pmbus

Yes

Package

QFN 8 x 8

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FEATURES

APPLICATIONS

PIN DIAGRAM

 6-phase & 8-phase dual output PWM Controller

 Phases are flexibly assigned between Loops 1 & 2

 Intel® VR12, AMD® 3.4MHz SVI/PVI & Memory

 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 loops

 Auto-Phase Detection with auto-compensation

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

 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, 7x7 48-pin & 8x8 56-pin QFN

 Intel ® VR12 & AMD® SVI & PVI based systems

 DDR Memory with Vtt tracking

 Overclocked & Gaming platforms

modes

phase

Gate Drive and Dynamic Phase Control

and Active Diode Emulation for Very Light Loads

minimizes output bulk capacitors and system cost

of Temperature, Voltage, Current & Power for

both loops

configuration

operation

packages

Figure 1: IR3536/CHL8326 Package Top View

VR_READY_L2

VR_READY

VFIXEN_PSI

/ PWROK

PWRGD

VINSEN

RCSP

RCSM

CFP

VSEN

VRTN

RRES

TSEN

V18A

VCC

November 28, 2011 | FINAL | V1.04

48 Pin 7x7 QFN

Top View

CHL8326

49 GND

RCSP_L2

RCSM_L2

VCC

VSEN_L2

VRTN_L2

PWM6

PWM5

PWM4

PWM3

PWM2

PWM1

VAR_GATE

Digital Multi-Phase Buck Controller

DESCRIPTION

The IR3536/CHL8326 and IR3538/CHL8328 are dual-loop

digital multi-phase buck controllers. The IR3536/CHL8326

drive up to 6 phases and the IR3538/CHL8328 drives up to

8 phases. The IR3536/CHL8326 and IR3538/CHL8328 are

fully Intel® VR12 and AMD® SVI/PVI compliant on both

loops and provide a Vtt tracking function for DDR memory.

The IR3536/CHL8326 and IR3538/CHL8328 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 based on real-time load current. IR Dynamic Phase

Control adds/drops phases based upon load current.

The IR3536/CHL8326 and IR3538/CHL8328 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

IR3536/CHL8326 and IR3538/CHL8328 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 IR3536/CHL8326 and IR3538/CHL8328 provides

extensive OVP, UVP, OCP and OTP fault protection and

includes thermistor based temperature sensing with

VR_HOT signal.

NVM storage saves pins and enables a small package size.

The IR3536/CHL8326 and IR3538/CHL8328 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.

Figure 2: IR3538/CHL8328 Package Top View

VR_READY_L2

Intel/MPoL mode

AMD mode

VFIXEN_PSI

VR_READY

/ PWROK

PWRGD

VINSEN

GPO_B

ISEN8

RCSP

RCSM

CFP

VSEN

VRTN

RRES

TSEN

V18A

VCC

56 Pin 8x8 QFN

Top View

CHL8328

CHL8326/28

IR3536/38

57 GND

ISEN7

RCSP_L2

RCSM_L2

VCC

VSEN_L2

VRTN_L2

PWM8

PWM7

PWM6

PWM5

PWM4

PWM3

PWM2

PWM1

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IR3538MTRPBF Summary of contents

Page 1

FEATURES  6-phase & 8-phase dual output PWM Controller  Phases are flexibly assigned between Loops 1 & 2  Intel® VR12, AMD® 3.4MHz SVI/PVI & Memory modes  Overclocking & Gaming Mode with Vmax setting  Switching frequency from ...

Page 2

... VINSEN 1 Intel/MPoL mode 2 AMD mode Figure 4: IR3538/CHL8328 Package Top View, Enlarged IR3536/38 CHL8326/28 Part Number Programming 1 3000 IR3536MTRPBF Unprogrammed 1 3000 IR3538MTRPBF Unprogrammed 2 3000 IR3536MxxyyTRP Customer Configuration 2 3000 IR3538MxxyyTRP Customer Configuration Tape & Reel Qty Part Number 3000 CHL8326-00CRT 3000 CHL8326-xxCRT 3000 ...

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