Overview
The TPS2530DBVT, produced by Texas Instruments, is a current-limited, power-distribution switch designed for applications where heavy capacitive loads and short-circuits are likely to be encountered. This device is particularly suited for use in DisplayPort, USB ports, hubs, laptops, desktops, and set-top boxes. It features a single power switch with a fixed current-limit threshold of 0.5 A, ensuring predictable fault current under all conditions.
The TPS2530DBVT operates in a constant-current mode when the output load exceeds the current-limit threshold, providing fast over-current response and built-in soft-start functionality to minimize current surges during turn-on and turn-off. It also includes reverse current blocking, overtemperature protection, and deglitched fault reporting.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage (VIN) | 2.7 | - | 5.5 | V |
| Enable Input Voltage (VEN) | 0 | - | 5.5 | V |
| High-Level Input Voltage (VIH) | - | 2 | - | V |
| Low-Level Input Voltage (VIL) | 0.7 | - | - | V |
| Continuous Output Current (IOUT) | - | - | 0.5 | A |
| Current-Limit (IOS) | 0.75 | 1 | 1.25 | A |
| Supply Current (ISD), Switch Disabled | - | 1 | 2 | µA |
| Undervoltage Lockout (VUVLO) Rising Threshold | 2.2 | 2.46 | 2.6 | V |
| Thermal Shutdown Rising Threshold | 135 | - | - | °C |
| Ambient Temperature Range | -40 | - | 85 | °C |
Key Features
- Single power switch with 0.5 A fixed current-limit threshold
- Pin-for-pin compatibility with existing TI switch portfolio
- ±25% accurate, fixed, constant current limit
- Fast over-current response – 2 µs
- Operating range: 2.7 V to 5.5 V
- Deglitched fault reporting
- Reverse current blocking
- Built-in soft-start
- Overtemperature protection
- Undervoltage lockout (UVLO) with hysteresis
Applications
- DisplayPort
- USB ports and hubs
- Laptops and desktops
- Set-top boxes
- Short-circuit protection in various electronic devices
Q & A
- What is the primary function of the TPS2530DBVT?
The TPS2530DBVT is a current-limited, power-distribution switch designed to protect against overcurrent and short-circuit conditions.
- What is the current-limit threshold of the TPS2530DBVT?
The current-limit threshold is 0.5 A with an accuracy of ±25%.
- What is the operating voltage range of the TPS2530DBVT?
The operating voltage range is from 2.7 V to 5.5 V.
- How does the TPS2530DBVT handle overcurrent conditions?
The device limits the output current to the static IOS levels and maintains a constant output current until the overload condition is removed or the device begins to thermal cycle.
- What is the purpose of the deglitched fault reporting feature?
The deglitched fault reporting feature avoids false reporting at startup and during transients by implementing a deglitch timer on both the rising and falling edges of the fault signal.
- How does the TPS2530DBVT protect against overtemperature conditions?
The device includes an overtemperature protection circuit that turns off the power switch when the junction temperature exceeds 135°C and remains off until the junction temperature cools by 20°C.
- What is the recommended input capacitance for the TPS2530DBVT?
A 0.1 µF or greater ceramic bypass capacitor between IN and GND is recommended for local noise de-coupling.
- Can the TPS2530DBVT be used in applications with high capacitive loads?
Yes, the TPS2530DBVT is designed to handle heavy capacitive loads and short-circuits.
- What is the significance of the built-in soft-start feature?
The built-in soft-start feature controls the rise and fall times of the output voltage to limit large current and voltage surges on the input supply during turn-on and turn-off.
- How does the TPS2530DBVT handle reverse current?
The device includes reverse current blocking when disabled, preventing current flow from the output to the input.
