Digital Multi-Phase Redundant & GPU Controller
IR3595
www.irf.com | © 2014 International Rectifier Februray 4, 2014 | V2.04
1
FEATURES
8-phase single or 6+2 dual loop configurable PWM
Controller
8-bit PVID, PWM VID or I2C setpoint control on
loop 1
Serial I2C setpoint control on optional loop 2
Programmable Constant Current Protection
Dead-phase Protection and Flag
Min/Max Telemetry registers and real-time
monitoring via I2C (I
IN
, V
IN
, I
OUT
, V
OUT
, 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
Protection: 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, 7x7mm, 56-pin,
0.4mm pitch QFN
APPLICATIONS
Supports Phase Redundant based Server systems
Server & Desktop CPU
High Performance Graphics Processors
DESCRIPTION
The IR3595 is an 8-phase digital multi-phase buck
controller that can be configured in either a single
loop or dual loop mode with a feature set optimized
to support redundant power supply systems and
high performance graphic processors.
The IR3595 allows system voltage setpoint
programming either through the 8-bit parallel VID,
nVIDIA’s PWM VID control, or via I2C control.
The IR3595 includes IR’s Efficiency Shaping
Technology which incorporates IR’s Variable Gate
Drive, Dynamic Phase Control (adds/drops phases
based upon load current), and active diode
emulation mode.
IR’s unique and proprietary digital Adaptive
Transient Algorithm (ATA) minimizes output bulk
capacitors and improves transient response.
The I2C interface can communicate with up to 127
IR3595-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 IR3595 extensive fault protection includes
output OV, UV and OC protection, 2 thermistor
based OT protection inputs with a VRHOT signal
output, and an Over Current warning flag.
ORDERING INFORMATION
Base Part
Number
Package Type
Standard Pack
Orderable
Part Number
Form Quantity
IR3595 QFN 7 mm x 7 mm Tape and Reel 3000 IR3595MxxyyTRP
2
IR3595 QFN 7 mm x 7 mm Tape and Reel 3000 IR3595MTRPBF
1
IR3595 QFN 7 mm x 7 mm Tray 2600 IR3595MTYPBF
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).
