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The AP7173 is a 1.5A low-dropout (LDO) linear regulator that features a user-programmable soft-start, an enable input and a power-good output. The soft-start reduces inrush current of the load capacitors and minimizes stress on the input power source during start-up. The enable input and power-good output allow users to configure power management solutions that can meet the sequencing requirements of FPGAs, DSPs, and other applications with different start-up and power-down requirements. The AP7173 is stable with any type of output capacitor of 2.2μF or more. A precision reference and feedback control deliver 2% accuracy over load, line, and operating temperature ranges. The AP7173 is available in both DFN3030-10 and SO-8EP packages.


  • PCs, Servers, Modems, and Set-Top-Boxes
  • FPGA Applications
  • DSP Core and I/O Voltages
  • Post-Regulation Applications
  • Applications With Sequencing Requirements


  • Low VIN and wide VIN range: 1.0V to 5.5V
  • Bias voltage (VVCC) range: 2.7V to 5.5V
  • Low VOUT range: 0.8V to 3.3V
  • Low dropout: 165mV typical at 1.5A, VVCC = 5V
  • 2% accuracy over line, load and temperature range
  • Power-Good (PG) output for supply monitoring and for sequencing of other supplies
  • Programmable soft-start provides linear voltage startup
  • Bias supply permits low VIN operation with good transient response
  • Stable with any output capacitor ≥ 2.2μF
  • DFN3030-10 and SO-8EP: available in “Green” molding compound (No Br, Sb)
  • Lead-free finish/ RoHS Compliant
  • Product Specifications

    Product Parameters

    Features High current
    IOUT 1.5 A
    VIN (Max) 5.5 V
    VIN (Min) 1 V
    VOUT ADJ(0.8), 0.8 to 3.3 V
    IQ 1000 µA
    PSRR 60 dB
    VDROPOUT (Max) 0.27 V
    Operating Temperature (Ambient) -40 to 85
    Enable Active H
    Channels 1

    Technical Documents

    Recommended Soldering Techniques


    Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
    AP7173-FNG-7 Arrow Electronics 3799 8/4/2020 Buy Now United States
    AP7173-FNG-7 Mouser Electronics Inc. 4744 8/4/2020 Buy Now United States
    AP7173-FNG-7 RS Components 1955 8/4/2020 Buy Now England
    AP7173-FNG-7 Digi-Key Electronics 4298 8/3/2020 Buy Now United States
    AP7173-FNG-7 RS Components Ltd. 1955 8/2/2020 Buy Now Japan
    AP7173-SPG-13 Mouser Electronics Inc. 2586 8/4/2020 Buy Now United States
    AP7173-SPG-13 RS Components 2175 8/4/2020 Buy Now England
    AP7173-SPG-13 RS Components Ltd. 2175 8/2/2020 Buy Now Japan