Overview
The TPS2553-Q1 is a precision adjustable current-limited power-distribution switch designed by Texas Instruments. This device is intended for applications where precision current limiting is required, or where heavy capacitive loads and short circuits are encountered. It provides up to 1.5 A of continuous load current and features adjustable current-limit thresholds between 75 mA and 1.7 A via an external resistor. The TPS2553-Q1 is qualified for automotive applications and meets the AEC-Q100 standards, ensuring reliability in harsh environments.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBV), 6 pins |
| Operating Temperature Range | -40°C to 125°C |
| Maximum Load Current | Up to 1.5 A |
| Current-Limit Accuracy | ±6% at 1.7 A (typical) |
| Input Voltage Range | 2.5 V to 6.5 V |
| High-Side MOSFET Resistance | 85 mΩ |
| ESD Protection | 15 kV per IEC 61000-4-2 (with external capacitance) |
| Overcurrent Response Time | 2 µs (typical) |
Key Features
- Qualified for automotive applications and AEC-Q100 certified
- Adjustable current-limit threshold between 75 mA and 1.7 A via an external resistor
- Up to 1.5 A of continuous load current
- ±6% current-limit accuracy at higher current-limit settings
- Fast overcurrent response time of 2 µs (typical)
- 85 mΩ high-side MOSFET
- Reverse input-output voltage protection
- Built-in soft-start functionality
- 15 kV ESD protection per IEC 61000-4-2 (with external capacitance)
- Backwards compatible with TPS2550/51 and TPS2551-Q1
Applications
The TPS2553-Q1 is suitable for various applications where precision current limiting and protection against heavy capacitive loads and short circuits are necessary. These include:
- Automotive systems requiring robust power distribution switches
- USB and other high-current bus systems
- Industrial control systems
- Consumer electronics with high-capacity batteries or capacitors
- Any system requiring adjustable current limiting and overcurrent protection
Q & A
- What is the maximum load current of the TPS2553-Q1?
Up to 1.5 A of continuous load current.
- What is the operating temperature range of the TPS2553-Q1?
-40°C to 125°C.
- How is the current-limit threshold adjusted in the TPS2553-Q1?
The current-limit threshold is adjusted via an external resistor between 75 mA and 1.7 A.
- What is the ESD protection level of the TPS2553-Q1?
15 kV per IEC 61000-4-2 (with external capacitance).
- Does the TPS2553-Q1 have built-in soft-start functionality?
- What is the typical overcurrent response time of the TPS2553-Q1?
2 µs (typical).
- Is the TPS2553-Q1 backwards compatible with other models?
- What type of protection does the TPS2553-Q1 offer against reverse input-output voltage?
The device offers reverse input-output voltage protection by disabling the power switch when the output voltage exceeds the input voltage by 135 mV (typical) for 4 ms (typical).
- How does the FAULT output signal behave during fault conditions?
The FAULT open-drain output is asserted (active low) during overcurrent, overtemperature, or reverse-voltage conditions.
- What is the recommended input capacitor for the TPS2553-Q1?
A 0.1 μF or greater ceramic capacitor from IN to GND as close to the IC as possible.
