Current Mode Control Internal 1.8A MOSFET Switching Regulator IC for Buck Converter (Wide Input Range Products)

Data Sheet


  • Current Mode Control
  • External Clock Synchronization
  • Wide Operating Voltage Range (4.5V to 40V)
  • Switching Current (2.7A min.)
  • PWM Control
  • Built-in Compensation Circuit
  • Correspond to Ceramic Capacitor (MLCC)
  • Oscillating Frequency (
    450kHz typ.(A, D ver.)
    300kHz typ.(B ver.))
  • Soft Start Function (4ms typ.)
  • UVLO (Under Voltage Lockout)
  • Over Current Protection (Hiccup type)
  • Thermal Shutdown Protection
  • Power Good Function (NJW4155GM1 only)
  • Standby Function
  • Package Outline (NJW4155GM1:HSOP8-M1/NJW4155DL3:TO-252-5-L3)

General Description

The NJW4155 is a buck converter with 40V/1.8A MOSFET. It corresponds to high oscillating frequency, and Low ESR Output Capacitor (MLCC) within wide input range from 4.5V to 40V. Therefore, the NJW4155 can realize downsizing of applications with a few external parts so that adopts current mode control. Also, it has a soft start function, external clock synchronization, over current protection and thermal shutdown circuit. It is suitable for supplying power to a Car Accessory, Office Automation Equipment, Industrial Instrument and so on.

Design Simulation Models

Package Information

Part NumberPackage OutlinePLPPinsMaterial Declaration (RoHS/Halogen)Terminal FinishWeight(mg) (Reference)Reflow solderingFlow solderingIron solderingPacking ConditionMSLSolder Foot Print
NJW4155GM1HSOP8-M1-8Pure Sn81Yes--Non dry pack1
NJW4155DL3TO-252-5-L3-5Sn2Bi301YesYesYesNon dry pack1

Sample & Buy

Part NumberPackagesStatusPacking SpecificationSampleBuy
NJW4155GM1-AHSOP8-M1(Active)Contact UsStock Check
NJW4155GM1-BHSOP8-M1(Active)Contact UsStock Check
NJW4155DL3-BTO-252-5-L3(Active)Contact UsStock Check
NJW4155GM1-DHSOP8-M1(Active)Contact UsStock Check