Overview
The TPS2553DRVT-1 from Texas Instruments is a precision adjustable current-limited power-distribution switch designed for applications where short circuits or heavy capacitive loads are encountered. This device is part of the TPS255x-1 family, which provides circuit breaker functionality by latching off the power switch during overcurrent or reverse-voltage situations. It offers up to 1.5 A of continuous load current and features adjustable current limits between 75 mA and 1.7 A through an external resistor. The TPS2553DRVT-1 is backward compatible with the TPS2550 and TPS2551 and includes built-in soft start, fast overcurrent response, and reverse input-output voltage protection.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Load Current | Up to 1.5 A | A |
| Current-Limit Accuracy at 1.7 A | ±6% | % |
| Adjustable Current Limit | 75 mA to 1700 mA (Typical) | mA |
| Operating Range | 2.5 V to 6.5 V | V |
| High-Side MOSFET Resistance | 85 mΩ (DBV Package) | mΩ |
| Overcurrent Response Time | 2 µs (Typical) | µs |
| ESD Protection | 15 kV per IEC 61000-4-2 (With External Capacitance) | kV |
| Thermal Shutdown Threshold | 155 °C | °C |
Key Features
- Adjustable Current Limit: Programmable current-limit threshold between 75 mA and 1.7 A through an external resistor.
- Circuit Breaker Functionality: Latches off the power switch during overcurrent or reverse-voltage situations.
- Fast Overcurrent Response: Responds within 2 µs (typical) to overcurrent conditions.
- Reverse Input-Output Voltage Protection: Disables the power switch when the output voltage is driven higher than the input voltage.
- Built-In Soft Start: Controls the rise and fall times of the output voltage to minimize current surges.
- High ESD Protection: 15 kV ESD protection per IEC 61000-4-2 with external capacitance.
- Thermal Protection: Thermal shutdown threshold at 155 °C.
Applications
- USB Ports and Hubs: Ideal for managing power distribution in USB applications.
- Digital TVs and Set-Top Boxes: Suitable for power management in consumer electronics.
- VOIP Phones and Other Communication Devices: Used for reliable power distribution in communication equipment.
Q & A
- What is the maximum load current of the TPS2553DRVT-1?
The maximum load current is up to 1.5 A.
- How is the current limit adjusted on the TPS2553DRVT-1?
The current limit is adjustable between 75 mA and 1.7 A through an external resistor.
- What is the operating voltage range of the TPS2553DRVT-1?
The operating voltage range is from 2.5 V to 6.5 V.
- Does the TPS2553DRVT-1 have built-in thermal protection?
- How does the TPS2553DRVT-1 respond to overcurrent conditions?
The device latches off the power switch during overcurrent or reverse-voltage situations.
- What is the ESD protection level of the TPS2553DRVT-1?
The device has 15 kV ESD protection per IEC 61000-4-2 with external capacitance.
- Is the TPS2553DRVT-1 backward compatible with other models?
- What type of MOSFET is used in the TPS2553DRVT-1?
The device uses an N-channel MOSFET with an on-state resistance of 85 mΩ (DBV Package).
- Does the TPS2553DRVT-1 have reverse input-output voltage protection?
- What is the typical response time for overcurrent conditions?
The device responds within 2 µs (typical) to overcurrent conditions.
