Overview
The TPS2553DBVT is a precision adjustable current-limited power-distribution switch produced by Texas Instruments. This device is designed for applications where precision current limiting is essential, particularly in scenarios involving heavy capacitive loads and short circuits. It provides up to 1.5 A of continuous load current and is available in a 6-pin SOT-23 package. The TPS2553DBVT is part of the TPS255x family, which includes both constant-current and latch-off versions, making it versatile for various power distribution needs.
Key Specifications
| Specification | Value |
|---|---|
| Package Type | SOT-23 (DBV) |
| Pins | 6 |
| Operating Temperature Range (°C) | -40 to 125 |
| Maximum Operating Supply Voltage (V) | 6.5 |
| Maximum Operating Current (A) | 1.5 |
| Switch On Resistance (mΩ) | 85 |
| Power Rating (mW) | 625 |
| Mounting Type | Surface Mount |
| Dimensions (mm) | 3.1 x 3.1 x 0.95 |
| ESD Protection (kV) | 15 (with external capacitance) |
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
- Operating Range: 2.5 V to 6.5 V
- Built-In Soft Start
- UL Listed – File No. E169910 and NEMKO IEC60950-1-am1 ed2.0
Applications
The TPS2553DBVT is suitable for a variety of applications, including but not limited to:
- USB power and charging ports
- Power distribution in consumer electronics
- Industrial control systems requiring precise current limiting
- Automotive systems where robust power switching is necessary
- Any scenario where heavy capacitive loads or short circuits are a concern
Q & A
- What is the maximum load current of the TPS2553DBVT?
The TPS2553DBVT can handle up to 1.5 A of continuous load current. - What is the current-limit accuracy of the TPS2553DBVT?
The current-limit accuracy is ±6% at 1.7 A (typical). - Is the TPS2553DBVT compatible with USB current-limiting requirements?
Yes, it meets USB current-limiting requirements. - What are the operating temperature ranges for the TPS2553DBVT?
The operating temperature range is -40°C to 125°C. - What is the switch on resistance of the TPS2553DBVT?
The switch on resistance is 85 mΩ. - Does the TPS2553DBVT have built-in ESD protection?
Yes, it has 15-kV ESD protection per IEC 61000-4-2 (with external capacitance). - What are the dimensions of the TPS2553DBVT package?
The dimensions are 3.1 x 3.1 x 0.95 mm. - Is the TPS2553DBVT UL listed?
Yes, it is UL listed – File No. E169910 and NEMKO IEC60950-1-am1 ed2.0. - What types of versions are available in the TPS255x family?
The TPS255x family includes both constant-current and latch-off versions. - How does the TPS2553DBVT handle overcurrent situations?
The TPS255x devices limit the output current to a safe level using a constant-current mode, while TPS255x-1 devices latch off the power switch during overcurrent or reverse-voltage situations.
