LD2985AM18R datasheet by STMicroelectronics

LD2985AM18R Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LD2985AM18R?
  The maximum input voltage that can be applied to the LD2985AM18R is 26V, although the recommended operating range is 6.5V to 20V.
• How do I ensure stability of the output voltage with varying input voltage and load conditions?
  To ensure stability, it's recommended to use a minimum output capacitance of 10uF, and to add a 1uF ceramic capacitor in parallel with the output capacitor to improve transient response. Additionally, the input capacitor should be at least 2.2uF.
• What is the maximum output current that the LD2985AM18R can deliver?
  The maximum output current that the LD2985AM18R can deliver is 1.5A, although this may be limited by the thermal performance of the package and the PCB design.
• How do I adjust the output voltage of the LD2985AM18R?
  The output voltage of the LD2985AM18R can be adjusted by connecting a resistor divider network between the output pin and the ground pin, with the center tap connected to the feedback pin. The output voltage can be calculated using the formula: Vout = 1.25V x (1 + R1/R2).
• What is the purpose of the EN pin, and how do I use it?
  The EN (enable) pin is used to turn the regulator on or off. When the EN pin is high, the regulator is enabled, and when it's low, the regulator is disabled. The EN pin can be connected to a logic signal or a switch to control the power-on sequence of the system.