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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.


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


  • 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

Product Specifications

Product Parameters

Maximum Continuous Output Current 0.2 A
Maximum Current Limit 0.4 A
Enable Logic No Enable
Minimum Operating Voltage (V) 2.7 V
Maximum Operating Voltage 5.2 V
Quiescent Current Typ (μA) 85 µA
RDS(ON) (VIN = 5V) Typ 250 mΩ
Output Discharge UVLO, Transient
OCP Output Latch Off No
OCP Flag No
Operating Ambient Temperature Range (°C) -40 to 85 °C
UL Listed Yes
NEMKO IEC 60950-1 CB Yes

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