LT1009CDRG4 datasheet by Texas Instruments

LT1009CDRG4 Frequently Asked Questions (FAQs)

• What is the recommended PCB layout for optimal performance of the LT1009CDRG4?
  Texas Instruments recommends a 4-layer PCB with a solid ground plane, and to keep the input and output traces as short as possible. Additionally, it's recommended to use a common-mode choke or ferrite bead to filter out high-frequency noise.
• How do I ensure the LT1009CDRG4 is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended compensation network values and layout guidelines. Also, ensure that the output capacitor is of high quality and has low ESR. Additionally, it's recommended to add a small resistor (e.g. 10Ω) in series with the output capacitor to prevent oscillation.
• What is the maximum input voltage that the LT1009CDRG4 can handle?
  The maximum input voltage of the LT1009CDRG4 is 15V, but it's recommended to keep the input voltage below 12V to ensure reliable operation and to prevent overheating.
• Can I use the LT1009CDRG4 in a high-temperature environment?
  The LT1009CDRG4 is rated for operation up to 125°C, but it's recommended to derate the output current and input voltage at high temperatures to prevent overheating and ensure reliable operation.
• How do I calculate the output voltage ripple of the LT1009CDRG4?
  The output voltage ripple of the LT1009CDRG4 can be calculated using the formula: ΔVout = (Iout * Rload) / (fsw * Cout), where Iout is the output current, Rload is the load resistance, fsw is the switching frequency, and Cout is the output capacitance.