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International Rectifier Electronic Components Datasheet

IR3448 Datasheet

Synchronous Buck Regulator

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16A Highly Integrated SupIRBuck®
Single-Input Voltage, Synchronous Buck Regulator
IR3448
FEATURES
Single 5V to 21V application
Wide Input Voltage Range from 1.5V to 21V with
external Vcc
Output Voltage Range: 0.6V to 0.86*PVin
0.5% accurate Reference Voltage
Enhanced line/load regulation with Feed-Forward
Programmable Switching Frequency up to 1.5MHz
Internal Digital Soft-Start
Enable input with Voltage Monitoring Capability
Remote Sense Amplifier with True Differential
Voltage Sensing
Thermally compensated current limit and Hiccup
Mode Over Current Protection
Smart LDO to enhance efficiency
External synchronization with Smooth Clocking
Dedicated output voltage sensing for power good
indication and overvoltage protection which
remains active even when Enable is low.
Enhanced Pre-Bias Start up
Body Braking to improve transient
Integrated MOSFET drivers and Bootstrap diode
Thermal Shut Down
Post Package trimmed rising edge dead-time
Programmable Power Good Output
Small Size 5mm x 6mm PQFN
Operating Junction Temp: -40oC<Tj<125oC
Lead-free, Halogen-free, and RoHS Compliant
DESCRIPTION
The IR3448 SupIRBuck® is an easy-to-use, fully
integrated and highly efficient DC/DC regulator. The
onboard PWM controller and MOSFETs make IR3448
a space-efficient solution, providing accurate power
delivery for low output voltage and high current
applications.
IR3448 is a versatile regulator which offers
programmability of switching frequency and current
limit while operating in wide input and output voltage
range.
The switching frequency is programmable from 300
kHz to 1.5MHz for an optimum solution.
It also features important protection functions, such as
Over Voltage Protection (OVP), Pre-Bias startup,
hiccup current limit and thermal shutdown to give
required system level security in the event of fault
conditions.
APPLICATIONS
Server Application
Distributed Point of Load Power Architectures
Set Top Box Application
Power Supplies
ORDERING INFORMATION
Base Part
Number
Package Type
IR3448
PQFN 5mm x 6mm
IR3448
PQFN 5mm x 6mm
Standard Pack
Form
Quantity
Tape and Reel
750
Tape and Reel
4000
Orderable Part
Number
IR3448MTR1PBF
IR3448MTRPBF
1 www.irf.com © 2013 International Rectifier
 
August 01, 2013
Free
D


International Rectifier Electronic Components Datasheet

IR3448 Datasheet

Synchronous Buck Regulator

No Preview Available !

BASIC APPLICATION
IR3448
Figure 1: IR3448 Basic Application Circuit
PIN DIAGRAM
5mm X 6mm POWER QFN
Top View
Figure 2: Efficiency [Vin=12V, Fsw=600kHz]
2 www.irf.com © 2013 International Rectifier
August 01, 2013
Free Datasheet http://www.datasheet4u.com/


Part Number IR3448
Description Synchronous Buck Regulator
Maker International Rectifier
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