NJM2345 Series
PWM DC/DC Converter IC with Standby Function

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  • Description

    The NJM2345 is a step down PWM DC/DC converter IC.An internal 1.5A power transistor, a pulse-by pulse current limit circuit and a 1% precision reference make the NJM2345 suitable for a wide range of voltage converter needs.The NJM2345 features a standby function that can be used for both power saving and safety operation.

  • Spec
    Input Voltage Range 3 V to 40 V (40 V)
    Operating Temperature Range -40°C to 85°C
    Supply Current Typ. 2800 µA
    Standby Current 9 µA
    Output Voltage Range 1.25 V to 38 V
    Output Voltage Accuracy ± 1 %
    Output Current 1500 mA
    Oscillator Frequency 1kHz to 150kHz
    Maximum Duty Cycle 100%
    Package DIP8
    Control Internal Over Current Limit Circuit
    Function Standby Function (9µA typ.)
    Note Internal High Power Transistor

    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
    • Related Links

      • Prime Designer

        Online Design Tool

        Registration to myNISD is required to use some of the functions, such as simulations.

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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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