NJW4122 Series
2A Synchronous Buck Converter for POL

Download Datasheet

  • Description

    The NJW4122 is a synchronous buck converter with 2A MOSFET. The NJW4122 has wide switching oscillating frequency range, 100kHz to 2.4MHz and external clock synchronization function. Therefore it can avoid interference with the AM radio frequency. Internal protection functions: UVLO, an over current protection and a thermal shutdown circuit can protect at abnormal condition. It is suitable for power supply circuit of SoC, DSP, DDR memory and so on that needs fast transient response.


    • Power supply for SoC, ASIC, DDR and the others

  • Spec
    Input Voltage Range 2.7 V to 5.5 V (7 V)
    Operating Temperature Range -40°C to 125°C
    Supply Current Typ. 2200 µA
    Standby Current 1 (max.) µA
    Output Voltage Range 0.6 V to 5 V
    Output Voltage Accuracy ± 1 %
    Output Current 2000 mA
    Package DFN8-U1(ESON8-U1)
    Control Current Mode Control
    PWM Control
    Function Standby Function
    Soft Start Function (1ms typ.)
    Over Current Protection (Hiccup type)
    Thermal Shutdown Protection
    Note UVLO (Under Voltage Lockout)
    Synchronous Rectification
    Correspond to Ceramic Capacitor (MLCC)

    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.

        • [V]
        • [V]
        • [V]
        • [A]
  • 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

Search for similar products under conditions below.

Category:DC/DC Switching Regulators

Topology Buck
min (V)
max (V)
min (V)
max (V)