NJW4140 Series
MOSFET Drive Switching Regulator IC for Boost / Fly-back Converter

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  • Description

    The NJW4140 is a MOSFET Drive switching regulator IC for Boost / Fly-back Converter that operates wide input range from 3V to 40V. It can provide large current application because of built-in highly effective Nch MOSFET drive circuit. Built-in pulse-by-pulse current detecting type over current protection limits the output current at over load. It is suitable for boost/fly-back application such as Car Accessory, Office Automation Equipment, Industrial Instrument and so on.


    • Automotive ECU
    • Industrial control equipment

  • Spec
    Consumer Automotive
    Input Voltage Range 3 V to 40 V (45 V)
    Operating Temperature Range -40°C to 85°C -40°C to 125°C
    Supply Current Typ. 1400 µA Max. 2000 µA
    Standby Current 2.5 µA 12 (max.) µA
    Output Voltage Range 3 V to - V
    Output Voltage Accuracy ± 1 % ± 2 %
    Oscillator Frequency 40kHz to 1MHz
    Package DMP8
    Control PWM Control
    Function Standby Function
    Over Current Protection
    Note UVLO (Under Voltage Lockout)
    AEC-Q100 AEC-Q100 Grade 1

    Protections / Functions

    TSD ILX OCP OVP UVLO OVLO Reverse Shutdown Soft Start SSCG PGOOD Auto Discharge Anti-ringing Sequencing Max Duty Ext. Phase LED Adjust
  • Technical
    • SPICE model download

      You can download the product's SPICE model. Login/registration to myNISD is required to download.

    • Related Links

      • Prime Designer

        Online Design Tool

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  • Quality &
    • Refer to the datasheets for the details on the product.
    • The package file or the datasheet includes package dimensions, taping specifications, taping reels dimensions, power dissipations, and recommended land pattern.

Download Datasheet

Functional Description

TSD Thermal Shutdown Function
ILX LX Current Limit Function
OCP Overcurrent Protection
OVP Overvoltage Protection
UVLO Undervoltage Lockout Protection
OVLO Overvoltage Lockout Protection
Reverse Reverse Current Protection Circuit
Shutdown Shutdown Function
Soft Start Soft Start Function
SSCG Spread Spectrum Clock Generator Function
PGOOD Power Good Output
Auto Discharge Auto Discharge Function
Anti-ringing Anti-ringing Switch Function
Sequencing Start-up Sequencing Control
Max Duty Maximum Duty Cycle
Ext. Phase Externally Adjustable Phase Compensation
LED Adjust LED High-speed Dimming Control

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Category:DC/DC Switching Regulators

Topology Boost,Fly-Back
min (V)
max (V)
min (V)