FEATURES

 Ultra Low Quiescent Power Dual output 4+1 phase

PWM Controller

 Intel®

VR12, VR12.5 & Memory VR modes

 Overclocking & Gaming Modes

 PVI GPU VR mode

 Switching frequency from 194KHz to 2MHz per

phase in 56 steps

 IR Efficiency Shaping Features including Dynamic

Phase Control and Automatic Power State Switching

 Programmable 1-phase or 2-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 PID Coefficient autoscaling

 Fault Protection: OVP, UVP, OCP, OTP, CAT FLT

 I2C/SMBus/PMBus system interface for reporting of

Temperature, Voltage, Current & Power telemetry for

both loops

 Multiple Time Programming (MTP) with integrated

charge pump for easy non-volatile programming

 Compatible with 3.3V tri-state drivers and IR ATL

mode drivers

 +3.3V supply voltage; -40o

C to 85o

C ambient

operation

 Pb-Free, RoHS, 5x5mm 40-pin, 0.4mm pitch QFN

DESCRIPTION

The IR3584 is a dual-loop digital multi-phase buck

controller designed for CPU voltage regulation,

and is fully compliant with Intel®

VR12 and

compliant with VR12.5 Rev 1.3 PWM

specifications.

The IR3584 includes IR’s Efficiency Shaping

Technology to deliver exceptional efficiency at

minimum cost across the entire load range. IR’s

Dynamic Phase Control adds/drops phases based

upon load current. The IR3584 can be configured

to enter 1 or 2-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.

IR3584 has 127 possible address values for both

the PMBus and I2C bus interfaces. The device

configuration can be easily defined using the IR

Digital Power Design Center (DPDC) GUI, and is

stored in the on-chip Non-Volatile Memory (NVM).

This reduces external components and minimizes

the package size.

The IR3584 provides extensive OVP, UVP, OCP,

OTP & CAT FLT fault protection, and includes

thermistor based temperature sensing or per

phase temperature reporting when using the IR

powIRstage. The controller is designed to work

with either Rdson current sense PowIRstages or

with DCR current sense.

The IR3584 also includes numerous VR design

simplifying and differentiating features, like register

diagnostics, which enable fast time-to-market.

APPLICATIONS

 Intel® VR12 and VR12.5 based systems

 Servers and High End Desktop CPU VRs

 High Performance Graphics Processors