NJU7677 Series
1.8V Operate PWM Control Step-Up / Flyback Switching Regulator IC

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  • Description

    The NJU7677 is a high-speed switching regulator control IC for PWM control step-up and fly-back converter that operates from 1.8V. It incorporates a totem pole driver output, which can directly drive an external MOS-FET. The NJU7677 also has a soft-start function, dead time control and timer latch for short circuit protection and their times are all adjustable with external parts. It is available in a small and thin 8-lead MSOP (TVSP) package. It is suitable for battery powered applications.

  • Spec
    Consumer
    Input Voltage Range 1.8 V to 7 V (8 V)
    Operating Temperature Range -40°C to 85°C
    Supply Current Typ. 600 µA
    Output Voltage Range 1.8 V to - V
    Output Voltage Accuracy ± 1 %
    Oscillator Frequency 300kHz to 1MHz
    Maximum Duty Cycle 90% typ.
    Package MSOP8(TVSP8)
    Control PWM switching control
    Function Soft-Start Function (Internal : 4ms typ. or adjustable)
    Timer Latch for Short Circuit Protection
    Dead Time Control

    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
    Documents
    • 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 &
    Packages
    • 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 Boost
VIN
min (V)
1.8
VIN
max (V)
7
VOUT
min (V)
1.8
ISS
(µA)
600