IR3831MPBF Datasheet, PDF (1/31 Pages) International Rectifier – HIGHLY EFFICIENT INTEGRATED SYNCHRONOUS BUCK REGULATOR FOR DDR APPLICATIONS

PD60363
IR3831MPbF
SupIRBuck^TM
HIGHLY EFFICIENT INTEGRATED
SYNCHRONOUS BUCK REGULATOR FOR DDR APPLICATIONS
Features
Description
• Wide Input Voltage Range 1.0V to 16V
The IR3831 SupIRBuck^TM is an easy-to-use, fully
• Wide Output Voltage Range 0.6V to 0.9*Vin
integrated and highly efficient DC/DC regulator.
• Continuous 8A Load Capability
The MOSFETS co-packaged with the on-chip
• Integrated Bootstrap-diode
PWM controller make IR3831 a space-efficient
• High Bandwidth E/A for excellent transient
performance
solution, providing accurate power delivery for
• Programmable Switching Frequency up to 1.5 MHz ^{DDR memory applications.}
• Programmable Over Current Protection (Hiccup) ^{IR3831 is configured to generate termination}
• PGood output
voltage (VTT) for DDR memory applications.
• 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
• Thermal Protection
IR3831 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.
• 5mm x 6mm Power QFN Package, 0.9 mm height It also features important protection functions,
• Lead-free, halogen-free and RoHS compliant
such as Pre-Bias startup, hiccup current limit and
Applications
• Server Applications
• Storage Applications
• Embedded Telecom Systems
• Distributed Point of Load Power Architectures
• Netcom Applications
thermal shutdown to give required system level
security in the event of fault conditions.
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
11/05/10