Digital Multi-Phase Redundant Controller
IR3590
www.irf.com | © 2014 International Rectifier February 4, 2014 | V2.05
1
FEATURES
6-phase single loop configurable PWM Controller
Serial I2C control for Vout changes
Programmable Constant Current Protection
Dead-phase Protection and Flag
Min/Max Telemetry registers and real-time
monitoring via I2C (IIN, VIN, IOUT, VOUT, Temp)
Programmable 1-phase or 2-phase for Light Loads
and Active Diode Emulation for Very Light Loads
IR Adaptive Transient Algorithm (ATA) minimizes
output bulk capacitors and system cost
IR Efficiency Shaping Features including Variable
Gate Drive and Dynamic Phase Control
Auto-Phase Detection with auto-compensation
Fault Protection: Output OVP, UVP, OC Warn,
OCP, OT Warn, OTP
Multiple Time Programming (MTP) with integrated
charge pump for easy custom configuration
Compatible with IR ATL and 3.3V tri-state Drivers
200kHz to 2MHz switching frequency per phase
+3.3V supply voltage; -40°C to 85°C Ambient
Pb-Free, Halogen Free, RoHS, 5x5mm, 40-pin,
0.4mm pitch QFN
APPLICATIONS
Supports Phase Redundant based Server
systems
Server CPU
Server Memory
DESCRIPTION
The IR3590 is a 6-phase digital, single loop, multi-
phase buck controller with a feature set optimized to
support redundant power supply systems. The
IR3590 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 phases based upon load current. The
IR3590 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, and
improves transient response and form factor.
The I2C interface can communicate with up to 127
IR3590-based VR loops. Device configuration and
fault parameters are easily defined using the IR
Digital Power Design Center (DPDC) GUI and stored
in on-chip MTP. MTP storage saves pins and
enables a small package size.
The IR3590 extensive fault protection includes
output OV, UV and OC protection, a thermistor
based OT protection input with a VRHOT signal
output, and a selectable and separate Over Current
warning flag through the ALERT#
ORDERING INFORMATION
Base Part
Number
Package Type
Standard Pack
Orderable
Part Number
Form Quantity
IR3590 QFN 5 mm x 5 mm Tape and Reel 3000 IR3590MxxyyTRP
2
IR3590 QFN 5 mm x 5 mm Tape and Reel 3000 IR3590MTRPBF
1
IR3590 QFN 5 mm x 5 mm Tray 4900 IR3590MTYPBF
1
Notes:
1. Unprogrammed/blank parts will not start up until programmed in order to ensure a safe power up.
2. Customer Specific Configuration File, where xx = Customer ID and yy = Configuration File (Codes assigned by IR Marketing).
