L4949EDTR-E datasheet by STMicroelectronics

L4949EDTR-E Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the L4949EDTR-E?
  The maximum input voltage that can be applied to the L4949EDTR-E is 28V, but it's recommended to keep it below 24V for reliable operation.
• How do I ensure the L4949EDTR-E is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended PCB layout guidelines, use a sufficient output capacitor, and add a 10nF capacitor between the VIN and GND pins.
• What is the minimum input voltage required for the L4949EDTR-E to operate?
  The minimum input voltage required for the L4949EDTR-E to operate is 6.5V, but it's recommended to keep it above 7V for reliable operation.
• Can I use the L4949EDTR-E in a high-temperature environment?
  The L4949EDTR-E is rated for operation up to 150°C, but it's recommended to derate the output current and input voltage at high temperatures to ensure reliable operation.
• How do I calculate the output voltage of the L4949EDTR-E?
  The output voltage of the L4949EDTR-E can be calculated using the formula: Vout = (R1 / R2) * (VIN - Vref), where R1 and R2 are the resistors in the feedback network, VIN is the input voltage, and Vref is the internal reference voltage (2.5V).