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Power Management

600mA,500kHz,Step-Down Switching Regulator in SOT23

  • Pin compatible with LT1933 and LT2842. Also it is possible to reduce an external part
  • Maximum Rating Input Voltage (45V)
  • Wide Operating Voltage Range (4.5V to 40V)
  • Switching Current (0.8A min.)
  • Fixed Operating Frequency (500kHz (A-version))
  • Uses Tiny Capacitors and Inductors
  • Soft Start Function
  • Low Shutdown Current < 1µA
  • Internally Compensated
  • Under Voltage Lockout (UVLO)
  • Output Adjustable Down to 1.25V
  • Over Current Protection
  • Thermal Shutdown Protection
  • Package Outline (SOT-23-6-1)
General Description
The NJW1933 is a switching regulator IC for buck converter that operates wide input voltage range from 4.5V to 40V. The wide input range makes the NJW1933 suitable for several applications such as 12V and/or 24V industrial supplies, automotive batteries and the other unregulated voltage sources.It corresponds to Low ESR output capacitor (MLCC), high operating frequency of 500kHz, internally compensated and small SOT-23 package. Therefore, the NJW1933 can realize downsizing of applications with a few and tiny external parts so that adopts current mode control.
Also, it has a soft start function, over current protection and thermal shutdown circuit.
  • Industrial Control Supplies
  • Automotive Battery Regulation
  • Office Automation Equipments
Design Simulation Models
pdf NJW1933 Application Simulator
Package Information
Part Number Package OutlinePinsMaterial Declaration (RoHS/Halogen)Terminal FinishWeight(mg) (Reference)Reflow solderingFlow solderingIron solderingPacking ConditionMSLSolder Foot Print
6Sn2Bi15YesYesYesNon dry pack1
Sample & Buy
Part NumberPackagesStatusPacking SpecificationSample  Buy   

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