Diodes Incorporated

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Back to Linear and Low Dropout (LDO) Regulators


300MA, Low Quiescent Current, Fast Transient Low Dropout Linear Regulator

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The AP7333 is a 300mA, fixed output voltage, low dropout linear regulator. The device included pass element, error amplifier, band-gap, current limit and thermal shutdown circuitry. The characteristics of low dropout voltage and low quiescent current make it suitable for low power applications, for example, battery powered devices. The typical quiescent current is approximately 65μA. Built-in current-limit and thermal-shutdown functions prevent IC from damage in fault conditions. The AP7333 is available in SOT23 packages with different pin-outs.


  • 300mA Low Dropout Regulator in 3-pin package
  • Very low IQ over full load: 65μA
  • Wide input voltage range: 2V to 6V
  • Fixed output options: 1.0V to 3.3V
  • PSRR: 65dB typical at 100Hz
  • Fast start-up time: 80μs
  • Stable with low ESR, 1μF ceramic output capacitor
  • Excellent Load/Line Transient Response
  • Low dropout: 300mV typical at 300mA
  • Current limit protection
  • Short circuit protection
  • Thermal shutdown protection
  • Ambient temperature range: -40°C to 85°C
  • Product Specifications

    Product Parameters

    Iq (max) (µA) 85
    Iq (typ) (µA) 55
    AEC Qualified No
    Compliance (Only Automotive supports PPAP) Standard
    Type LDO
    Output options Fixed
    Iout (A) 0.3
    Vin (Max) (V) 6
    Vin (Min) (V) 2
    Vout (min) 1
    Vout (max) 5.5
    Fixed Vout (V) 1.0, 1.2, 1.5, 1.8, 2.0, 2.5, 2.8, 3.0, 3.3
    Accuracy 25C 2
    VDROPOUT (Max) (V) at Max Current and Max Ouput Voltage 0.055
    PSRR (dB) 1kHz 55
    Operating Temperature (Ambient) (°C) -40 to 85
    Enable Active No
    Channels 1
    Output Discharge No
    Power Good No
    Reverse Protection No
    VCTL Function No

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