IR3831WMPBF_1 Datasheet, PDF (1/32 Pages) International Rectifier – HIGHLY EFFICIENT INTEGRATED SYNCHRONOUS BUCK REGULATOR FOR DDR APPLICATIONS

IR3831WMPbF
SupIRBuck^TM
HIGHLY EFFICIENT INTEGRATED
SYNCHRONOUS BUCK REGULATOR FOR DDR APPLICATIONS
Features
Description
• Wide Input Voltage Range 1.0V to 16V
The IR3831W SupIRBuck^TM is an easy-to-use,
• Wide Output Voltage Range 0.6V to 0.9*Vin
fully integrated and highly efficient DC/DC
• Continuous 8A Load Capability
regulator. The MOSFETS co-packaged with the
• Integrated Bootstrap-diode
on-chip PWM controller make IR3831W a space-
• High Bandwidth E/A for excellent transient
performance
efficient solution, providing accurate power
• Programmable Switching Frequency up to 1.5 MHz ^{delivery for DDR memory applications.}
• Programmable Over Current Protection
IR3831W is configured to generate termination
• PGood output
voltage (VTT) for DDR memory applications.
• Hiccup Current Limit
• Programmable Soft-Start
• Enable Input with Voltage Monitoring Capability
• Enhanced Pre-Bias Start-up
• Vp input for DDR Tracking applications
• -40^oC to 125^oC operating junction temperature
IR3831W offers programmability of start up time,
switching frequency and current limit while
operating in wide input and output voltage range.
The switching frequency is programmable from
250kHz to 1.5MHz for an optimum solution.
• Thermal Protection
It also features important protection functions,
• 5mm x 6mm Power QFN Package, 0.9 mm height such as Pre-Bias startup, hiccup current limit and
• Lead-free, halogen-free and RoHS compliant
thermal shutdown to give required system level
security in the event of fault conditions.
Applications
• Server Applications
• Storage Applications
• Embedded Telecom Systems
• Distributed Point of Load Power Architectures
• Netcom Applications
1.0V <Vin<16V
4.5V <Vcc<5.5V
Enable
Vin _Boot
VDDQ
Vcc
SW
Vo
PGood
PGood
Vp
Rt
OCSet
Fb
SS/ SD Gnd
Comp
PGnd
Fig. 1. Typical application diagram
1
Rev 14.0