TPS3125G15DBVR datasheet by Texas Instruments

TPS3125G15DBVR Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the TPS3125G15DBVR?
  The maximum input voltage that can be applied to the TPS3125G15DBVR is 15V, as specified in the datasheet. However, it's recommended to keep the input voltage below 12V to ensure reliable operation and to prevent overheating.
• How do I ensure the TPS3125G15DBVR is stable and doesn't oscillate?
  To ensure stability, it's essential to follow the layout guidelines provided in the datasheet, including keeping the input and output capacitors close to the device, using a low-ESR output capacitor, and minimizing the loop area of the power traces. Additionally, adding a small ceramic capacitor (e.g., 10nF) between the VOUT and GND pins can help to improve stability.
• What is the minimum input capacitance required for the TPS3125G15DBVR?
  The minimum input capacitance required for the TPS3125G15DBVR is 1uF, as specified in the datasheet. However, it's recommended to use a higher value (e.g., 4.7uF or 10uF) to ensure stable operation and to filter out high-frequency noise.
• Can I use the TPS3125G15DBVR in a high-temperature environment?
  The TPS3125G15DBVR is rated for operation up to 125°C, but it's essential to consider the thermal design and ensure that the device is properly cooled. The device's power dissipation and thermal resistance (θJA) should be taken into account to prevent overheating and ensure reliable operation.
• How do I calculate the output voltage of the TPS3125G15DBVR?
  The output voltage of the TPS3125G15DBVR is set by the resistor divider network connected to the FB pin. The output voltage can be calculated using the formula: VOUT = 1.5V x (R1 + R2) / R2, where R1 and R2 are the resistors in the divider network.