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reference designIR3448M

Infineon Technologies IR3448M

16A Highly Integrated Single Input Voltage Sync Buck Regulator

Overview

TopologyBuck Converter
Input voltage12 V
Switching frequency270-1650 kHz
Output 15 V / 16 A

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 asOver Voltage Protection (OVP), Pre-Bias startup, hiccup current limit and thermal shutdown to give required system level security in the event of faultconditions.

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 whichremains 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

Remarks:List of inductorsRefer page no.10,11,12.

Typical applications

  • Set Top Box Application
  • Distributed Point of Load Power Architectures
  • Power Supplies
  • Server Application

More information

Parts approved by Infineon Technologies

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Order Code
Data­sheet
Simu­lation
Downloads
Status
Product series
L(µH)
IRP,40K(A)
ISAT,10%(A)
ISAT,30%(A)
RDC max.(mΩ)
Material
LR(µH)
fres(MHz)
SamplesAvailability & Sample
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7443330100
SPECWE-HCC SMT High Current Cube Inductor, 1 µH, 27.2 A

PCN pending

Due to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff.

Simu­lation
Availability
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Downloads9 files

Status
ActiveProduction is active. Expected lifetime: >10 years.
iProduction is active. Expected lifetime: >10 years.
Product seriesWE-HCC SMT High Current Cube Inductor
Inductance1 µH
Performance Rated Current27.2 A
Saturation Current @ 10%26.5 A
Saturation Current @ 30%31.1 A
DC Resistance2.65 mΩ
MaterialFerrite 
Rated Inductance0.95 µH
Self Resonant Frequency100 MHz
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