Overview
The TPS2551DRVTG4 is a power-distribution switch from Texas Instruments, designed for applications where heavy capacitive loads and short-circuits are likely to be encountered. This device is part of the TPS2550/51 series, which utilizes an N-channel MOSFET to provide adjustable current limiting and robust protection features. The TPS2551 is specifically configured with an active-high enable input, making it suitable for a variety of power management scenarios.
Key Specifications
| Parameter | Min | Typ | Max | 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 | |
| Static Drain-Source On-State Resistance (rDS(on)) | 94 | 100 | 115 | mΩ (DBV package at TJ = 25°C) |
| Junction Temperature Range | -40 | 125 | °C | |
| ESD Protection | 15 kV | (with external capacitance) |
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
- Built-in soft-start functionality
- 15 kV ESD protection (with external capacitance)
- UL listed – file No. E169910
- Deglitched fault report
- 1-μA maximum standby supply current
- Operating range: 2.5 V to 6.5 V
Applications
- USB Ports and Hubs
- Cell phones
- Laptops
- Heavy Capacitive Loads
- Reverse-Voltage Protection
Q & A
- What is the operating voltage range of the TPS2551DRVTG4?
The operating voltage range is from 2.5 V to 6.5 V.
- How is the current limit set on the TPS2551DRVTG4?
The current limit is set using an external resistor connected between the ILIM pin and ground.
- What is the typical overcurrent response time of the TPS2551DRVTG4?
The typical overcurrent response time is 2 μS.
- Does the TPS2551DRVTG4 have built-in ESD protection?
- What is the purpose of the FAULT pin on the TPS2551DRVTG4?
The FAULT pin is an open-drain output that is asserted (active low) during overcurrent, overtemperature, or reverse-voltage conditions.
- How does the TPS2551DRVTG4 handle reverse input-output voltage protection?
The device turns off the N-channel MOSFET whenever the output voltage exceeds the input voltage by 135 mV (typical) for 4-ms, preventing significant current from sinking into the input capacitance.
- What is the maximum continuous output current of the TPS2551DRVTG4?
The maximum continuous output current is 1.1 A.
- Does the TPS2551DRVTG4 have a built-in soft-start feature?
- What is the junction temperature range of the TPS2551DRVTG4?
The junction temperature range is from -40°C to 125°C.
- Is the TPS2551DRVTG4 UL listed?
