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SOT26-Chip-Image.pngPrecision Adjustable Current-Limit Power Switches
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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.
| 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 |
