Overview
The TPS2557DRBR, 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 and potential short circuits. The TPS2557DRBR offers a programmable current-limit threshold between 500 mA and 5 A, making it versatile for various power distribution needs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage (VIN) | 2.5 - 6.5 | V |
| Enable Voltage (VEN) | 0 - 6.5 | V |
| Continuous Output Current (IOUT) | 0 - 5 | A |
| Current Limit | 500 mA - 5 A | |
| On State Resistance | 22 mΩ | |
| Standby Supply Current | 2 µA (max) | |
| Operating Junction Temperature | -40 to 125 | °C |
| ESD Protection | 15 kV and 8 kV system-level ESD capable | |
| Package Type | VSON (8 pins) |
Key Features
- Programmable Current Limit: Adjustable current-limit threshold between 500 mA and 5 A through an external resistor.
- Soft Start: Built-in soft start to minimize current surges during turn-on and turn-off.
- ESD Protection: 15 kV and 8 kV system-level ESD capable.
- FAULT Logic Output: Asserts low during overcurrent and overtemperature conditions with an internal delay deglitch circuit to prevent false reporting.
- Undervoltage Lockout (UVLO): Disables the power switch until the input voltage reaches the UVLO turn-on threshold.
- Low Standby Supply Current: Maximum standby supply current of 2 µA.
Applications
- USB Ports and Hubs
- Digital TVs
- Set-Top Boxes
- VOIP Phones
Q & A
- What is the input voltage range for the TPS2557DRBR?
The input voltage range is 2.5 V to 6.5 V. - How is the current limit set on the TPS2557DRBR?
The current limit is set through an external resistor, allowing for a programmable current-limit threshold between 500 mA and 5 A. - What is the on-state resistance of the TPS2557DRBR?
The on-state resistance is 22 mΩ. - Does the TPS2557DRBR have built-in ESD protection?
Yes, it is 15 kV and 8 kV system-level ESD capable. - What is the purpose of the FAULT logic output?
The FAULT logic output asserts low during overcurrent and overtemperature conditions. - How does the TPS2557DRBR handle undervoltage conditions?
The device features an undervoltage lockout (UVLO) circuit that disables the power switch until the input voltage reaches the UVLO turn-on threshold. - What is the maximum standby supply current of the TPS2557DRBR?
The maximum standby supply current is 2 µA. - What are some common applications for the TPS2557DRBR?
Common applications include USB ports and hubs, digital TVs, set-top boxes, and VOIP phones. - Does the TPS2557DRBR have a soft start feature?
Yes, it has a built-in soft start feature to minimize current surges during turn-on and turn-off. - What is the operating junction temperature range for the TPS2557DRBR?
The operating junction temperature range is -40°C to 125°C.
