IR3891M

Dual Ouput 4A per phase Highly Integrated Single-Input Voltage, Synchronous Buck Regulator in a PQFN package.

ParametricIR3891M
Iout4.0A
Output Voltage  min  max0.5V  12.0V
Switching Frequency  min  max300.0kHz  1500.0kHz
TechnologyPOL
PackagePQFN / 5 x 6 F
TypeDual Output
Design ToolYes
Input Voltage  min  max1.0V  21.0V
Moisture Sensitivity Level2
QualificationIndustrial
FeaturesSYNC + feed-forward + interleaved operation
Internal Bias LDOYes
Sales Product NameIR3891M
OPNIR3891MTRPBF
Product Statusactive
Package NamePQFN 5X6 31L
Completely lead freeno
Halogen freeyes
RoHS compliantyes
Packing Size4000
Packing TypeTAPE & REEL
Moisture Level2
Benefits:
  • Single 5V to 21V application
  • Wide Input Voltage Range from 1.0V to 21V with external Vcc
  • Output Voltage Range: 0.5V to 0.86*Vin
  • Dual output, 4A/Phase
  • Enhanced Line/Load Regulation with Feed-Forward
  • Programmable Switching Frequency up to 1.5MHz
  • Internal Digital Soft-Start
  • Enable input with Voltage Monitoring Capability
  • Thermally Compensated Current Limit with hiccup mode over current protection
  • External Synchronization with Smooth Clocking
  • Enhanced Pre-Bias Start-Up
  • Precision Reference Voltage (0.5V+/-1%)
  • Seq pin for Sequencing Applications
  • Integrated MOSFETs, drivers and Bootstrap Diode
  • Thermal Shut Down
  • Open Feedback Line Protection
  • Over Voltage Protection
  • Out of Phase Operation to reduce Input Capacitors
  • Monotonic Start-Up
  • Operating temp: -40°C where Tj is < 125°C
  • Small Size: 5mm x 6mm QFN
  • 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 - IR3891M,EN1.7 MB03 Feb 2013
Evaluation Boards
BoardFamilyDescriptionStatus
IRDC3891Dual Output in 5x6mm PQFN. Out of phase operation to reduce Input Capacitors. Programmable Switching Frequency up to 1.5MHz.IR3891Mactive
EN IR3891M