Digital Multi-Phase Redundant & GPU Controller

IR3595

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

 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).