Diodes Incorporated

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0.2A Single Channel Current-Limited Load Switch With Output Transient Discharge

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The AP2331TD is a single channel current-limited integrated high-side power switcher optimized for hot-swap applications. The devices have fast short-circuit response time for improved overall system robustness and provide a complete protection solution for application subject to heavy capacitive loads and the prospect of short circuit. It offers reverse-current blocking, over-current, over-temperature and short-circuit protection, as well as controlled rise time and under-voltage lockout functionality.

The device is available in SOT23 and SC59 packages.


  • Quick Turn-off of Output Discharge Path at Power Down
  • Input Voltage Range: 2.7V - 5.2V
  • Fast Short-Circuit Response Time
  • 0.4A Accurate Current Limiting
  • 250mΩ On-Resistance Reverse-Current Blocking
  • Built-In Soft-Start with 0.7ms Typical Turn-On Time 
  • Over-Current Protection
  • Over-Voltage Protection
  • Short-Circuit and Thermal Protection
  • ESD Protection: 3KV HBM, 300V MM
  • Ambient Temperature Range: -40°C to +85°C
  • Available in “Green” Molding Compound (No Br, Sb)
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • UL Recognized, File Number E322375
  • IEC60950-1 CB Scheme Certified


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

Product Specifications

Product Parameters

Type OCP Switch
AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Maximum Continuous Output Current (A) 0.2
(MAX) Maximum Current Limit Fixed (A) 0.4
Adjustable Current Limit No
Channels 1
Enable Logic No Enable
Minimum Operating Voltage (V) 2.7
Maximum Operating Voltage (V) 5.2
Quiescent Current Typ (µA) 85
RDS(ON) (VIN = 5V) Typ (mΩ) 250
Reverse Current Block Yes
Minimum Power Supply Voltage (V) 2.7
Maximum Power Supply Voltage (V) 5.2
Output Discharge No
(TYP) Output Rise Time mS 0.7
OCP Output Latch Off No
OCP Flag No
Power Good No
Operating Ambient Temperature Range (°C) -40 to 85
Overtemperature Protection Yes
UL Certificate Yes

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