Overview
The TPS2552DDBVT, produced by Texas Instruments, is a precision adjustable current-limited power-distribution switch. This device is designed for applications requiring precise current limiting, particularly in scenarios involving heavy capacitive loads or short circuits. The TPS2552DDBVT is part of the TPS2552D and TPS2553D family, which offers programmable current-limit thresholds and robust protection features.
The device is available in a SOT-23 (6) package and operates within a voltage range of 2.7 V to 6.5 V. It provides up to 1.5 A of continuous load current and features a fast overcurrent response time of 2 μs (typical). The TPS2552DDBVT also includes built-in soft-start, reverse input-output voltage protection, and thermal shutdown to ensure reliable operation.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Operating Voltage Range | 2.7 | - | 6.5 | V |
| Continuous Load Current | - | - | 1.5 | A |
| Current-Limit Threshold | 75 | - | 1700 | mA |
| Current-Limit Accuracy | - | ±6% | - | % |
| Static Drain-Source On-State Resistance (rDS(on)) | 85 | 95 | 135 | mΩ |
| Rise Time (tr) | 0.7 | 1.1 | 1.5 | ms |
| Fall Time (tf) | 0.2 | - | 0.5 | ms |
| Enable Pin Turn On/Off Threshold | 0.66 | 1.1 | - | V |
| Thermal Shutdown Threshold | 135 | - | - | °C |
| ESD Protection | - | - | 15 kV | - |
Key Features
- Precision adjustable current limiting with thresholds between 75 mA and 1.7 A (typical).
- Fast overcurrent response time of 2 μs (typical).
- Reverse input-output voltage protection to prevent damage to input-side devices.
- Built-in soft-start to minimize current surges during turn-on.
- Thermal shutdown with hysteresis to protect against overtemperature conditions.
- 15 kV ESD protection per IEC 61000-4-2.
- UL Listed – File No. E169910 and NEMKO IEC60950-1-am1 ed2.0.
- FAULT open-drain output asserted during overcurrent, overtemperature, or reverse-voltage conditions.
Applications
- USB Ports and Hubs.
- Digital TV.
- Set-Top Boxes.
- VOIP Phones.
- Any application requiring precision current limiting and robust protection features.
Q & A
- What is the operating voltage range of the TPS2552DDBVT?
The operating voltage range is from 2.7 V to 6.5 V.
- What is the maximum continuous load current the TPS2552DDBVT can handle?
The device can handle up to 1.5 A of continuous load current.
- How does the TPS2552DDBVT protect against overcurrent conditions?
The device limits the output current to a safe level using a constant-current mode when the output load exceeds the current-limit threshold.
- What is the purpose of the FAULT output on the TPS2552DDBVT?
The FAULT open-drain output is asserted during overcurrent, overtemperature, or reverse-voltage conditions.
- How does the TPS2552DDBVT protect against reverse-voltage conditions?
The device turns off the N-channel MOSFET when the output voltage exceeds the input voltage by 135 mV (typical) for 4 ms (typical).
- What is the thermal shutdown threshold for the TPS2552DDBVT?
The thermal shutdown threshold is 135°C (typical) while in current limit, and 155°C (typical) for ambient thermal shutdown.
- Does the TPS2552DDBVT have built-in ESD protection?
Yes, it has 15 kV ESD protection per IEC 61000-4-2.
- What are some common applications for the TPS2552DDBVT?
Common applications include USB ports and hubs, digital TV, set-top boxes, and VOIP phones.
- How does the TPS2552DDBVT handle thermal cycling during an overload condition?
The device cycles on and off until the overload condition is removed, with the switch turning on after the device has cooled by approximately 10°C.
- What is the purpose of the soft-start feature in the TPS2552DDBVT?
The soft-start feature minimizes current surges during turn-on.
