Overview
The TPS2553DBVT-1 is a power-distribution switch from Texas Instruments, designed for applications where precision current limiting and protection against overcurrent and reverse-voltage conditions are essential. This device is part of the TPS255x-1 family, which includes circuit breaker functionality by latching off the power switch during overcurrent or reverse-voltage situations. It supports continuous load currents up to 1.5 A and operates within a voltage range of 2.5 V to 6.5 V. The TPS2553DBVT-1 features an adjustable current limit, fast overcurrent response, and built-in soft-start functionality, making it suitable for a variety of electronic systems.
Key Specifications
| Parameter | Typical Value | Unit |
|---|---|---|
| Operating Voltage Range | 2.5 V to 6.5 V | V |
| Continuous Load Current | Up to 1.5 A | A |
| Adjustable Current Limit | 75 mA to 1700 mA | mA |
| Static Drain-Source On-State Resistance (DBV Package) | 85 mΩ | mΩ |
| Overcurrent Response Time | 2 µs | µs |
| Reverse-Voltage Comparator Trip Point | 135 mV | mV |
| Thermal Shutdown Threshold | 155 °C | °C |
| ESD Protection | 15 kV (with external capacitance) | kV |
| Package Type | SOT-23 (DBV) |
Key Features
- Adjustable Current Limit: Programmable current-limit threshold between 75 mA and 1.7 A through an external resistor.
- Circuit Breaker Functionality: The TPS2553DBVT-1 latches off the power switch during overcurrent or reverse-voltage situations.
- Fast Overcurrent Response: Responds to overcurrent conditions within 2 µs.
- Reverse-Voltage Protection: Disables the power switch when the output voltage exceeds the input voltage by 135 mV.
- Built-In Soft Start: Controls the rise and fall times of the output voltage to minimize current surges.
- Thermal Protection: Thermal shutdown at 155 °C with a hysteresis of 10 °C.
- ESD Protection: 15 kV ESD protection per IEC 61000-4-2 with external capacitance.
- FAULT Flag: Asserts low during overcurrent, overtemperature, or reverse-voltage conditions.
Applications
- USB Ports and Hubs: Ideal for protecting USB ports from overcurrent and short-circuit conditions.
- Digital TVs and Set-Top Boxes: Used to manage power distribution and protect against overcurrent and reverse-voltage conditions.
- VOIP Phones and Other Communication Devices: Provides reliable power management and protection features.
Q & A
- What is the operating voltage range of the TPS2553DBVT-1?
The operating voltage range is from 2.5 V to 6.5 V.
- How much continuous load current can the TPS2553DBVT-1 handle?
It can handle up to 1.5 A of continuous load current.
- What is the adjustable current limit range for the TPS2553DBVT-1?
The adjustable current limit range is between 75 mA and 1700 mA.
- How does the TPS2553DBVT-1 respond to overcurrent conditions?
The device latches off the power switch during overcurrent conditions.
- What is the reverse-voltage comparator trip point for the TPS2553DBVT-1?
The reverse-voltage comparator trips at 135 mV.
- Does the TPS2553DBVT-1 have built-in thermal protection?
Yes, it has thermal shutdown at 155 °C with a hysteresis of 10 °C.
- What is the ESD protection rating for the TPS2553DBVT-1?
It has 15 kV ESD protection per IEC 61000-4-2 with external capacitance.
- How does the FAULT flag operate in the TPS2553DBVT-1?
The FAULT flag asserts low during overcurrent, overtemperature, or reverse-voltage conditions.
- What are some common applications for the TPS2553DBVT-1?
Common applications include USB ports, digital TVs, set-top boxes, and VOIP phones.
- Does the TPS2553DBVT-1 have built-in soft-start functionality?
Yes, it controls the rise and fall times of the output voltage to minimize current surges.
