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International Rectifier - HIGHLY EFFICIENT INTEGRATED SYNCHRONOUS BUCK REGULATOR

Numéro de référence IR3831WMPBF
Description HIGHLY EFFICIENT INTEGRATED SYNCHRONOUS BUCK REGULATOR
Fabricant International Rectifier 
Logo International Rectifier 





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IR3831WMPBF fiche technique
IR3831WMPbFwww.DataSheet4U.com
SupIRBuckTM
HIGHLY EFFICIENT INTEGRATED
SYNCHRONOUS BUCK REGULATOR FOR DDR APPLICATIONS
Features
Description
Wide Input Voltage Range 1.5V to 16V
Wide Output Voltage Range 0.6V to 0.9*Vin
The IR3831W SupIRBuckTM is an easy-to-use,
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
Programmable Switching Frequency up to 1.5 MHz
efficient solution, providing accurate
delivery for DDR memory applications.
power
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
-40oC to 125oC 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
Applications
security in the event of fault conditions.
Server Applications
Storage Applications
Embedded Telecom Systems
Distributed Point of Load Power Architectures
Netcom Applications
1.5V <Vin<16V
4.5V <Vcc<5.5V
VDDQ
PGood
Enable
Vcc
PGood
Vp
Rt
SS/ SD Gnd
Vin Boot
SW
OCSet
Fb
Comp
PGnd
Vo
Rev 13.0
Fig. 1. Typical application diagram
1

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