Dual Output Digital Multi-Phase Controller

IR3566A

October 1, 2013 | V3.04

1

FEATURES

 Dual output 6+1 phase PWM Controller

 Fully supports AMD® SVI1 & SVI2 with dual

OCP and Intel® VR12

 PVI and SVI GPU VR modes

 Overclocking & Gaming Mode

 Switching frequency from 200kHz to 2MHz

per phase

 IR Efficiency Shaping Features including

Dynamic Phase Control and Automatic Power

State Switching

 Programmable 1-phase operation for Light

Loads and Active Diode Emulation for Very

Light Loads

 IR Adaptive Transient Algorithm (ATA) on both

loops minimizes output bulk capacitors and

system cost

 Auto-Phase Detection with auto-compensation

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

OTP

 I2C/SMBus/PMBus system interface for

telemetry of Temperature, Voltage, Current &

Power for both loops

 Multiple Time Programming (MTP) with

integrated charge pump for easy custom

configuration

 Compatible with IR ATL and 3.3V tri-state

Drivers

 +3.3V supply voltage; -40°C to 85°C ambient

operation

 Pb-Free, RoHS, 6x6mm, 48-pin, 0.4mm pitch

QFN

ORDERING INFORMATION

DESCRIPTION

The IR3566A is a dual-loop digital multi-phase buck

controller designed for CPU voltage regulation and is

fully compliant with AMD® SVI1 & SVI2 and Intel

©

VR12 specifications.

The IR3566A includes IR

’s 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

’s Dynamic Phase

Control adds/drops active phases based upon load

current and can be configured to enter 1-phase

operation and 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 and Multiple Time

Programmable (MTP) storage saves pins and enables

a small package size. Device configuration and fault

parameters are easily defined using the IR Digital

Power Design Center (DPDC) GUI and stored in on-

chip MTP.

The IR3566A provides extensive OVP, UVP, OCP and

OTP fault protection and includes thermistor based

temperature sensing with VRHOT signal.

The IR3566A includes numerous features like register

diagnostics for fast design cycles and platform

differentiation, simplifying VRD design and enabling

fastest time-to-

market (TTM) with “set-and-forget”

methodology.

APPLICATIONS

 AMD® SVI1 & SVI2, Intel® VR12 based systems

 Servers and High End Desktop CPU VRs

 High Performance Graphics Processor

Base Part

Number

Package Type

Standard Pack

Orderable

Part Number

Form

Quantity

IR3566A

QFN 6 mm x 6 mm

Tape and Reel

3000

IR3566AMxxyyTRP

1

IR3566A

QFN 6 mm x 6 mm

Tape and Reel

3000

IR3566AMTRPBF

IR3566A

QFN 6 mm x 6 mm

Tray

4900

IR3566AMTYPBF

Notes:

1. Customer Specific Configuration File, where xx = Customer ID and yy = Configuration File (Codes assigned by IR Marketing).