IR3846M

35A Highly Integrated Single-Input Voltage, Synchronous Buck Regulator in a PQFN package.

ParametricIR3846M
Iout35.0A
Input Voltage  min  max1.5V  21.0V
Internal Bias LDOYes
Output Voltage  min  max0.6V  18.06V
FeaturesRemote Sense + SYNC + smart LDO + feed-forward
PackagePQFN / 5 x 7
Switching Frequency  min  max300.0kHz  1500.0kHz
TechnologyPOL
TypeSingle Output
Moisture Sensitivity Level3
QualificationIndustrial
Sales Product NameIR3846M
OPNIR3846MTRPBF
Product Statusactive
Package NameMLPQ 5X7 34L
Completely lead freeno
Halogen freeyes
RoHS compliantyes
Packing Size4000
Packing TypeTAPE & REEL
Moisture Level3
OPNIR3846MTR1PBF
Product Statusdiscontinued
Package NameMLPQ 5X7 34L
Completely lead freeno
Halogen freeyes
RoHS compliantyes
Packing Size750
Packing TypeTAPE & REEL
Moisture Level3
Benefits:
  • 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
  • Vp for tracking applications and sequencing
  • Vref is available externally to enable margining
  • 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 with tracking
  • Small Size 5mm x 7mm PQFN
  • Operating Junction Temp: -40°C where Tj is < 125°C
  • Lead-free, Halogen-free and RoHS Compliant
Target Applications:
  • Desktop and Workstations
  • Fan
  • Graphic Boards
  • Netcom and Telecom
  • Point of Load
  • Pump
  • Servers and Storage
  • Servo Drives
  • Solar
  • UPS
  • Welding
Data Sheet
TitleSizeDateVersion
Data Sheet - IR3846M,EN3.4 MB16 Aug 2013
Evaluation Boards
BoardFamilyDescriptionStatus
IRDC3846Remote Differential Voltage Sense. Programmable Switching Frequency up to 1.5MHz. Single Rail Operation, Tracking, Margining, OCP.IR3846Mactive
EN IR3846M