TPS40002DGQ datasheet by Texas Instruments

TPS40002DGQ Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance?
  Texas Instruments provides a recommended PCB layout in the TPS40002DGQ datasheet (Section 10.2) and in the TPS40002DGQ Evaluation Module User's Guide. It's essential to follow these guidelines to minimize noise, ensure proper thermal management, and optimize performance.
• How do I select the correct input and output capacitors?
  The selection of input and output capacitors depends on the specific application requirements. TI recommends using low-ESR capacitors with a minimum capacitance of 10uF for the input and output. The capacitor selection guide in the datasheet (Section 7.3) provides more information on how to choose the right capacitors.
• What is the maximum ambient temperature for reliable operation?
  The TPS40002DGQ is rated for operation up to 85°C ambient temperature. However, it's essential to consider the thermal management and ensure that the device does not exceed the maximum junction temperature (TJ) of 150°C. Proper heat sinking and airflow can help maintain a safe operating temperature.
• How do I configure the soft-start feature?
  The soft-start feature can be configured using the SS/TR pin. A capacitor connected between the SS/TR pin and GND sets the soft-start time. The datasheet (Section 7.4) provides a formula to calculate the soft-start time based on the capacitor value.
• What is the recommended input voltage range for optimal performance?
  The recommended input voltage range for the TPS40002DGQ is 2.7V to 5.5V. Operating the device outside this range may affect its performance, efficiency, and reliability.