Texas Instruments provides a recommended PCB layout in the TPS79901 datasheet, which includes guidelines for component placement, trace routing, and thermal management. Additionally, the TI website offers a PCB layout checklist and a layout guide for low-dropout (LDO) regulators like the TPS79901.
The output capacitor selection depends on the output voltage, output current, and desired transient response. A general guideline is to use a capacitor with a minimum capacitance of 1 μF and an ESR (Equivalent Series Resistance) of less than 1 Ω. TI recommends using a ceramic capacitor with an X5R or X7R dielectric. The datasheet provides more detailed guidance on output capacitor selection.
The TPS79901DRVRG4 has an absolute maximum input voltage rating of 12 V. However, the recommended operating input voltage range is 2.2 V to 10 V. Exceeding the absolute maximum rating can damage the device.
The TPS79901DRVRG4 is rated for operation from -40°C to 125°C. However, the device's performance and reliability may degrade at high temperatures. TI recommends derating the output current and input voltage at high temperatures to ensure reliable operation.
To ensure stability, follow the recommended PCB layout guidelines, use a suitable output capacitor, and avoid long, thin traces between the input and output pins. Additionally, TI recommends adding a 10 nF to 100 nF capacitor between the EN pin and GND to filter noise and prevent oscillation.
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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.
