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