Diodes Incorporated

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U DFN2020 6 Type F

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AP2553A (Not Recommended for new design)

NRND = Not Recommended for New Design

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The AP2553A is a single channel precision adjustable current-limited switches optimized for applications that require up to 2.1A of continuous load current during heavy loads/short circuits. It offers a programmable current-limit threshold between 75mA and 2.35A via an external resistor. Current limit accuracy ±6% can be achieved at high current-limit settings. It has a fast short-circuit response time for improved overall system robustness. It provides reverse current blocking and limiting, over-current, over-temperature and short-circuit protection, as well as control°C rise time and under-voltage lockout functionality.
A 7ms deglitch capability on the open-drain Flag output prevents false over-current reporting and does not require any external components.

The AP2553A latches the output off when the output current exceeds current-limit threshold or the output voltage rises above the input voltage creating a reverse current to flow.

It is available in U-DFN2020-6 and SOT26 packages with green mold compounds.

Other members of this family include:
AP2552A has opposite polarity enable to AP2553A and has same function as AP2553A
AP2552/53 provide current limit function during over-current or reverse-voltage conditions.


  • Set-Top-Boxes
  • LCD TVs & Monitors
  • Residential Gateways
  • Laptops, Desktops, Servers, e-Readers, Printers, Docking Stations, HUBs
  • Product Specifications

    Product Parameters

    Enable Logic Active High
    Maximum Continuous Output Current 2.1
    Maximum Current Limit 2.35
    Maximum Operating Voltage 5.5
    Minimum Operating Voltage (V) 2.7
    NEMKO IEC 60950-1 CB Yes
    OCP Flag Yes
    OCP Output Latch Off Yes
    Operating Ambient Temperature Range (°C) -40 to 85
    Output Discharge Yes
    Quiescent Current Typ (mA) 60
    RDS(ON) (VIN = 5V) Typ 70
    UL Listed Yes

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