Overview
The TPS2551DRVR is a current-limited, power-distribution switch from Texas Instruments, designed for applications where heavy capacitive loads and short-circuits are likely to be encountered. This device incorporates a 94-mΩ, N-channel MOSFET in a single package and is part of the TPS2550/51 family. It features adjustable current-limiting, fast overcurrent response, and built-in protection mechanisms such as overtemperature and reverse-voltage protection. The TPS2551DRVR is particularly suited for USB ports, hubs, cell phones, laptops, and other devices requiring robust power distribution and protection.
Key Specifications
| Parameter | Minimum | Maximum | Unit |
|---|---|---|---|
| Input Voltage (VIN) | 2.5 | 6.5 | V |
| Enable Voltage (VEN) | 0 | 6.5 | V |
| Continuous Output Current (IOUT) | 0 | 1.1 | A |
| Current-Limit Set Resistor (RILIM) | 14.3 | 80.6 | kΩ |
| FAULT Sink Current (I/FAULT) | 0 | 10 | mA |
| Junction Temperature (TJ) | –40 | 125 | °C |
| On-Resistance (RDS(ON)) | 94 | mΩ | |
| Standby Supply Current | 1 | μA |
Key Features
- Adjustable current-limit between 100 mA and 1.1 A via an external resistor
- Fast overcurrent response - 2 μS typical
- 94-mΩ high-side MOSFET (DBV package)
- Reverse input-output voltage protection
- Operating range: 2.5 V to 6.5 V
- Deglitched fault report
- 1-μA maximum standby supply current
- Junction temperature range: –40°C to 125°C
- Built-in soft-start
- 15 kV ESD protection (with external capacitance)
- UL listed – file No. E169910
Applications
- USB Ports/Hubs
- Cell phones
- Laptops
- Heavy Capacitive Loads
- Reverse-Voltage Protection
Q & A
- What is the adjustable current-limit range of the TPS2551DRVR?
The current-limit threshold is adjustable between 100 mA and 1.1 A via an external resistor.
- What is the typical overcurrent response time of the TPS2551DRVR?
The overcurrent response time is typically 2 μS.
- What is the on-resistance of the MOSFET in the TPS2551DRVR?
The on-resistance of the MOSFET is 94 mΩ.
- What is the operating voltage range of the TPS2551DRVR?
The operating voltage range is from 2.5 V to 6.5 V.
- Does the TPS2551DRVR have built-in soft-start functionality?
- What kind of protection does the TPS2551DRVR offer against reverse voltage?
The TPS2551DRVR offers reverse input-output voltage protection, turning off the MOSFET if the output voltage exceeds the input voltage by 135 mV for 4 ms.
- How does the FAULT output work in the TPS2551DRVR?
The FAULT open-drain output is asserted (active low) during overcurrent, overtemperature, or reverse-voltage conditions and remains asserted until the fault condition is removed.
- What is the maximum standby supply current of the TPS2551DRVR?
The maximum standby supply current is 1 μA.
- What is the junction temperature range of the TPS2551DRVR?
The junction temperature range is from –40°C to 125°C.
- Is the TPS2551DRVR UL listed?
- What kind of ESD protection does the TPS2551DRVR offer?
The TPS2551DRVR offers 15 kV ESD protection with external capacitance.
