TPS79901DRVRG4 datasheet by Texas Instruments

TPS79901DRVRG4 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for the TPS79901DRVRG4 to ensure optimal performance?
  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.
• How do I choose the right output capacitor for the TPS79901DRVRG4?
  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.
• What is the maximum input voltage that the TPS79901DRVRG4 can handle?
  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.
• Can I use the TPS79901DRVRG4 in a high-temperature environment?
  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.
• How do I ensure the TPS79901DRVRG4 is stable and doesn't oscillate?
  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.