NJU7691 Series
300mA Synchronous Step-Down Switching Regulator IC

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  • Description

    The NJU7691 is a synchronous rectification switching regulator IC with a power MOSFET (300mA output).It incorporates an over-current detection and thermal shutdown circuit, which can make a power supply circuit with few external parts. The output voltage can be set from 1.8V.Therefore it is suitable for a power supply circuit for digital chips and logic ICs. The NJU7691 is available in a small and thin 8-lead MSOP (TVSP) package.

  • Spec
    Input Voltage Range 2.2 V to 7 V (8 V)
    Operating Temperature Range -40°C to 85°C
    Supply Current Typ. 1300 µA
    Standby Current 5 (max.) µA
    Output Voltage Range 0.8 V to 6.5 V
    Output Voltage Accuracy ± 1 %
    Output Current 300 mA
    Oscillator Frequency 300kHz to 1MHz
    Maximum Duty Cycle 100%
    Control PWM switching control
    Function Soft-Start Function (4ms typ.)
    Note Over Current Protection
    300mA Synchronous Step-Down

    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

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        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.

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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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