Diodes Incorporated

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Precision Adjustable Current-Limited Power Switches

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The AP22652 and AP22653 are single channel precision adjustable current-limited switches optimized for applications that require precision current limiting, or to provide up to 2.1A of continuous load current during heavy loads/short circuits. These devices offer a programmable current-limit threshold between 125mA and 2665mA (typ) via an external resistor. Current limit accuracy ±10% can be achieved at high current-limit settings. The rise and fall times are controlled to minimize current surges during turn on/off.

The devices have fast short-circuit response time for improved overall system robustness. They provide a complete protection solution for applications subject to heavy capacitive loads and the prospect of short circuit, offering reverse current blocking and limiting, over-current, over-temperature and short-circuit protection, as well as controlled rise time and under-voltage lockout functionality. A 6ms deglitch capability on the open-drain Flag output prevents false over-current reporting and does not require any external components.

The AP22652 and AP22653 limit the output current to a safe level when the output current exceeds current-limit threshold.


  • Up to 2.1A Maximum Load Current
  • Accurate Adjustable Current Limit, 125mA to 2665mA
  • ±7% Accurate Adjustable Current Limit, 1.735A with RLIM = 15kΩ
  • Constant-Current (AP22652, AP22653) During Over-Current
  • Fast Short-Circuit Response Time: 5µs (Typ.)


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

Product Specifications

Product Parameters

Type OCP Switch
AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Maximum Continuous Output Current (A) 2.1
(MAX) Maximum Current Limit Fixed (A) 2.665
Adjustable Current Limit No
Channels 1
Enable Logic Active High
Minimum Operating Voltage (V) 3
Maximum Operating Voltage (V) 5.5
Quiescent Current Typ (µA) 140
RDS(ON) (VIN = 5V) Typ (mΩ) 65
Reverse Current Block Yes
Minimum Power Supply Voltage (V) 3
Maximum Power Supply Voltage (V) 5.5
Output Discharge Yes
(TYP) Output Rise Time mS 0.5
OCP Output Latch Off No
OCP Flag Yes
Power Good No
Operating Ambient Temperature Range (°C) -40 to 85
Overtemperature Protection Yes
UL Certificate Yes

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2674 2024-03-28 2024-06-26 Additional Wafer Source SPFAB