低电平有效的 0.5-5A 可调节 ILIMIT 2.5-6.5V、22mΩ USB 电源开关
| Vin (Min) (V) | 2.5 |
| Vin (Max) (V) | 6.5 |
| Continuous current (Max) (A) | 5 |
| Current limit (A) | 0.5 to 5.0 |
| Product type | Adjustable current limit, Power switch |
| Operating temperature range (C) | -40 to 125 |
| Enable | Active Low |
| Number of switches | 1 |
| Rating | Catalog |
- Meets USB Current-Limiting Requirements
- Adjustable Current Limit, 500 mA to 5 A (Typical)
- ±6.5% Current-Limit Accuracy at 4.5 A
- Fast Overcurrent Response: 3.5-μs (Typical)
- 22-mΩ High-Side MOSFET
- Operating Voltage: 2.5 V to 6.5 V
- 2-μA Maximum Standby Supply Current
- Built-in Soft Start
- 15-kV and 8-kV System-Level ESD Capable
- UL Listed: File No. E169910 and CB IEC60950-1-am2 ed2.0
The TPS255x power-distribution switch is intended for applications where precision current limiting is required or heavy capacitive loads and short circuits are encountered. These devices offer a programmable current-limit threshold between 500mA and 5 A (typical) through an external resistor. The power-switch rise and fall times are controlled to minimize current surges during turnon and turnoff.
TPS255x devices limit the output current to a safe level by switching into a constant-current mode when the output load exceeds the current-limit threshold. The FAULT logic output asserts low during overcurrent and overtemperature conditions.
