Overview
The TPS2553DRVR from Texas Instruments is a precision adjustable current-limited power-distribution switch designed for applications where short circuits or heavy capacitive loads are anticipated. This device utilizes N-channel MOSFETs and provides up to 1.5 A of continuous load current. It is backwards compatible with the TPS2550 and TPS2551, making it a versatile option for various power distribution needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Maximum Load Current | 1.5 | A |
| Current-Limit Accuracy | ±6% at 1.7 A (typical) | % |
| Adjustable Current Limit | 75 mA to 1700 mA (typical) | mA |
| Operating Voltage Range | 2.5 V to 6.5 V | V |
| High-Side MOSFET Resistance | 85 mΩ | mΩ |
| ESD Protection | 15 kV per IEC 61000-4-2 (with external capacitance) | kV |
| Package Type | WSON-6-EP (2x2 mm) | - |
| Overtemperature Protection | Junction temperature exceeds 135 ℃ (typ) | ℃ |
Key Features
- Up to 1.5 A maximum load current
- ±6% current-limit accuracy at 1.7 A (typical)
- Meets USB current-limiting requirements
- Backwards compatible with TPS2550 and TPS2551
- Adjustable current limit: 75 mA to 1700 mA (typical)
- Constant-current (TPS255x) and latch-off (TPS255x-1) versions
- Fast overcurrent response - 2 µs (typical)
- Reverse input-output voltage protection
- Built-in soft-start functionality
- UL listed – File No. E169910 and NEMKO IEC60950-1-am1 ed2.0
Applications
The TPS2553DRVR is designed for applications where precision current limiting is crucial, such as in systems with heavy capacitive loads or potential short circuits. It is suitable for a variety of power distribution scenarios, including USB power management, battery charging circuits, and general-purpose power switching in electronic devices.
Q & A
- What is the maximum load current of the TPS2553DRVR?
The TPS2553DRVR can handle up to 1.5 A of continuous load current.
- How accurate is the current-limiting feature of the TPS2553DRVR?
The current-limit accuracy is as tight as ±6% at 1.7 A (typical).
- What is the operating voltage range of the TPS2553DRVR?
The device operates within a voltage range of 2.5 V to 6.5 V.
- Does the TPS2553DRVR have built-in overtemperature protection?
- How does the TPS2553DRVR handle reverse-voltage conditions?
The device has an internal reverse-voltage comparator that disables the power switch when the output voltage exceeds the input voltage by 135 mV (typical) for 4 ms (typical).
- What types of overcurrent responses are available in the TPS2553DRVR?
The device is available in constant-current (TPS255x) and latch-off (TPS255x-1) versions.
- Does the TPS2553DRVR have ESD protection?
- Is the TPS2553DRVR backwards compatible with other models?
- How is the current limit adjusted in the TPS2553DRVR?
The current limit can be adjusted between 75 mA and 1700 mA (typical) via an external resistor.
- What is the purpose of the FAULT output in the TPS2553DRVR?
The FAULT output asserts low during overcurrent, overtemperature, or reverse-voltage conditions and remains asserted until the fault condition is removed or the device is reset.
