Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good thermal design practices, such as using a solid ground plane, placing thermal vias under the IC, and keeping the thermal path short and direct to the heat sink or ambient air.
To ensure stable and accurate output voltage, it's crucial to follow the recommended input and output capacitor selection, use a low-ESR output capacitor, and ensure the feedback network is properly compensated. Additionally, consider using a voltage reference IC, such as the TLV7031, to improve output voltage accuracy.
Although the datasheet specifies a maximum input voltage of 18V, it's recommended to limit the input voltage to 15V to ensure reliable operation and prevent damage to the IC. Exceeding 15V may cause internal voltage regulators to malfunction or fail.
The power-good (PG) output signal is an open-drain output that requires an external pull-up resistor to a voltage rail. The PG signal is asserted low when the output voltage is within regulation and de-asserted high when the output voltage is out of regulation. Use a pull-up resistor value between 1kΩ to 10kΩ to ensure proper operation.
Texas Instruments recommends using a low-ESR, X5R or X7R ceramic capacitor with a value between 4.7μF to 10μF as the input capacitor. This helps to filter out input noise and ensure stable operation.
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About Texas Instruments
Texas Instruments (TI) designs and manufactures semiconductors and integrated circuits for a wide range of applications. The company's product portfolio includes analog chips, which are essential for managing power and signal functions in electronic devices, and embedded processors, which serve as the brains in various systems, enabling functionality in everything from industrial equipment to consumer electronics. TI's innovations in semiconductor technology have made it a leader in the industry.
