Diodes Incorporated — Analog and discrete power solutions
SOT26

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AP22654

Precision Adjustable Current-Limit Power Switches

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Description

The AP22654 and AP22655 are single channel precision adjustable current-limit switches optimized for applications that require precision current limiting, or to provide up to 3.1A of continuous load current during heavy loads/short circuits. These devices offer a pin-strapped current-limit threshold between 0.4A and 3.56A (typ) via an external resistor. Current limit accuracy ±12% 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, overcurrent, overtemperature and short-circuit protections, as well as controlled rise time and undervoltage lockout functionality. A 7ms deglitch capability on the open-drain Flag output prevents false overcurrent reporting and does not require any external components.

AP22654 and AP22655 limit the output current to a safe level when the output current exceeds current-limit threshold.

Both devices are available in TSOT26 (Type A1) package.  

Feature(s)

  • Up to 3.1A Maximum Load Current
  • Accurate Adjustable Current Limit, 0.4A to 3.56A
  • ±12% Accurate Adjustable Current Limit, 1.0A with RLIM = 6.8kΩ
  • Constant Current During Overcurrent
  • Fast Short-Circuit Response Time: 5µs (typ)
  • Reverse Current Blocking During Shutdown and Reverse Current Limiting During Enable
  • Operating Range: 3.0V to 5.5V
  • Built-in Soft-Start with 1.0ms Typical Rise Time
  • Overcurrent, Reverse Output Current/Voltage and Thermal Protection
  • Fault Report (FAULT) with Blanking Time
  • ESD Protection: 2kV HBM, 1.5kV CDM
  • Active Low (AP22654) or Active High (AP22655) Enabled
  • TSOT26 (Type A1) Package: Available in “Green” Molding Compound (No Br, Sb)
  • 15kV ESD Protection per IEC 61000-4-2 (With Ext. Capacitance)
  • UL Recognized, File Number E322375, Vol. 1
  • IEC62368-1 CB Scheme Certified
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/

Application(s)

  • Notebook PCs/laptops
  • Desktops
  • Residential gateways
  • LCD TVs/monitors
  • Docking stations
  • USB hubs
  • Set-top boxes
  • Servers

Product Specifications

Product Parameters

Type OCP Switch
AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Maximum Continuous Output Current (A) 3.1
(MAX) Maximum Current Limit Fixed (A) 3.5
Adjustable Current Limit No
Channels 1
Enable Logic Active Low
Minimum Operating Voltage (V) 3
Maximum Operating Voltage (V) 5.5
Quiescent Current Typ (µA) 90
RDS(ON) (VIN = 5V) Typ (mΩ) 50
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 1
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

Technical Documents

Recommended Soldering Techniques

TN1.pdf