Overview
The TPS2553DBVR-1 from Texas Instruments is a precision adjustable current-limited power-distribution switch designed for applications requiring high accuracy and protection against overcurrent and reverse-voltage conditions. This device is part of the TPS255x family and offers advanced features such as adjustable current limiting, fast overcurrent response, and built-in reverse input-output voltage protection.
The TPS2553DBVR-1 is particularly suited for scenarios involving heavy capacitive loads and short circuits, making it an ideal choice for USB power switching and other power distribution applications.
Key Specifications
| Specification | Value |
|---|---|
| Maximum Load Current | Up to 1.5 A |
| Current-Limit Accuracy | ±6% at 1.7 A (Typical) |
| Operating Voltage Range | 2.5 V to 6.5 V |
| High-Side MOSFET Resistance | 85 mΩ |
| Adjustable Current Limit | 75 mA to 1700 mA (Typical) |
| Overcurrent Response Time | 2 µs (Typical) |
| Reverse Input-Output Voltage Protection | Yes |
| ESD Protection | 15 kV per IEC 61000-4-2 (With External Capacitance) |
| Package Options | SOT-23 (DBV), WSON (DRV) |
Key Features
- Adjustable Current Limit: Programmable current-limit threshold between 75 mA and 1.7 A through an external resistor.
- Circuit Breaker Functionality: The TPS2553DBVR-1 provides latch-off functionality during overcurrent or reverse-voltage situations.
- Reverse Input-Output Voltage Protection: An internal reverse-voltage comparator disables the power switch when the output voltage is driven higher than the input.
- Fast Overcurrent Response: Responds to overcurrent conditions within 2 µs (typical).
- Built-In Soft Start: Controlled power-switch rise and fall times to minimize current surges.
- FAULT Output: Asserts low during overcurrent, overtemperature, or reverse-voltage conditions.
- ESD Protection: 15 kV per IEC 61000-4-2 (with external capacitance).
- Compliance: Meets USB current-limiting requirements and is UL listed.
Applications
The TPS2553DBVR-1 is designed for applications where precision current limiting is crucial, such as:
- USB power switching
- Power distribution in consumer electronics
- Protection against heavy capacitive loads and short circuits
- Systems requiring high reliability and fault protection
Q & A
- What is the maximum load current of the TPS2553DBVR-1?
Up to 1.5 A.
- What is the current-limit accuracy of the TPS2553DBVR-1?
±6% at 1.7 A (typical).
- What is the operating voltage range of the TPS2553DBVR-1?
2.5 V to 6.5 V.
- How does the TPS2553DBVR-1 protect against reverse input-output voltage?
An internal reverse-voltage comparator disables the power switch when the output voltage is driven higher than the input.
- What is the response time for overcurrent conditions?
2 µs (typical).
- Does the TPS2553DBVR-1 have built-in ESD protection?
- What types of packages are available for the TPS2553DBVR-1?
SOT-23 (DBV) and WSON (DRV).
- How does the FAULT output work?
The FAULT output asserts low during overcurrent, overtemperature, or reverse-voltage conditions.
- Is the TPS2553DBVR-1 compliant with USB current-limiting requirements?
- What is the purpose of the built-in soft start feature?
To control power-switch rise and fall times and minimize current surges during turn-on and turn-off.
