IR HiRel Product Families



Highly Efficient Integrated 4A Sync Buck Regulator



Greater than 95% Maximum Efficiency

Wide Input Voltage Range 1.5V to 16V

Wide Output Voltage Range 0.7V to 0.9*Vin

Continuous 4A Load Capability

Integrated Bootstrap-diode

High Bandwidth E/A for excellent transient performance

Programmable Switching Frequency up to 1.5MHz

Programmable Over Current Protection

PGood output

Lead-free, halogen-free and RoHS compliant

Hiccup Current Limit

Precision Reference Voltage (0.7V, +/-1%)

Programmable Soft-Start

Enable Input with Voltage Monitoring Capability

Enhanced Pre-Bias Start-up

Seq input for Tracking applications

-40°C to 125°C operating junction temperature

Thermal Protection

Pin compatible option for 8A and 12A devices

5mm x 6mm Power QFN Package, 0.9 mm height


Base Part StatusObsolete
CircuitSingle Output
Input Voltage (V)1.5 - 16
OCP OTP UVLO Pre-Bias Soft Start andPGOOD + EN + SEQ + OVD
Output Range (V)0.7 - 0.9*Vin
PackagePQFN / 5 x 6 D
Qual LevelIndustrial
Switch Freq (kHz)250 - 1500
Vout (Max)14.0
Vout (Min)0.7
1k Budgetary Pricing1.562
Base Station TelecomYes
Routers SwitchesYes
Server StorageYes
Design ToolYes


POL DC-DC solutions include integrated regulators, discrete MOSFETs, power blocks, design tools and reference designs.

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Design Tools

Design Tools

SupIRBuck Design Tool

Schematic Capture, AC, Steady State, Transient Analysis, Thermal Analysis, BOM creation

Tool Introduction

PQFN / 5 x 6 D

Part # IR3842WMTRPBF

Highly Efficient Integrated 4A Sync Buck Regulator

$1.561K Budgetary Pricing (USD):
Packaging OptionsPart NumberStatusStandard Pack Quantity
An IR3842WM shipped on Tape and ReelIR3842WMTR1PBFOBSOLETE750
An IR3842WM shipped on Tape and ReelIR3842WMTRPBFOBSOLETE4000
An IR3842WM sample quantityIR3842WMPBFOBSOLETE5

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