MOSFET Drive Switching Regulator IC for Boost / Fly-back Converter

Data Sheet

New Product Information


  • Current Mode Control
  • Wide Operating Voltage Range (2.5 to 40V)
  • Nch MOSFET Drive Voltage (5.2V typ.)
  • Oscillating Frequency (50kHz to 1MHz)
  • External Clock Synchronization
  • PWM Control
  • Soft Start (Fixed 20ms typ.)
  • Adjustable Startup Voltage
  • Over Voltage Protection
  • Over Current Protection (Hiccup)
  • UVLO (Undervoltage Lockout)
  • Thermal Shutdown
  • Standby Function
  • Package (MSOP10 (VSP10)* *Meet JEDEC MO-187-DA)

General Description

The NJW1871 is a MOSFET drive switching regulator IC for boost / fly-back converters that operates wide operating voltage range from 2.5V to 40V. The internal Nch MOSFET driver circuit provides high efficiency driving, makes this device ideal for high output current applications. The protection function is equipped pulse-by-pulse overcurrent detection to limits the switching current at overload. The NJW1871 is suitable for boost / fly-back applications such as industrial instruments and so on.


  • Consumer Electronics
  • Industrial Instruments
  • Boost Converter for Small to Middle Range Power Supplies

Design Simulation Models

Package Information

Part NumberPackage OutlinePLPPinsMaterial Declaration (RoHS/Halogen)Terminal FinishWeight(mg) (Reference)Reflow solderingFlow solderingIron solderingPacking ConditionMSLSolder Foot Print
NJW1871RMSOP10(VSP10)10-Sn2Bi21YesYesYesNon dry pack1

Sample & Buy

Part NumberPackagesStatusPacking SpecificationSampleBuy
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