LT1785IS8 datasheet by Linear Technology

LT1785IS8 Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LT1785IS8?
  The maximum input voltage that can be applied to the LT1785IS8 is 36V, but it's recommended to keep it below 30V for reliable operation.
• How do I ensure the LT1785IS8 is stable and doesn't oscillate?
  To ensure stability, make sure to follow the recommended layout and component placement guidelines, use a low-ESR output capacitor, and add a 10nF-100nF capacitor between the VCC and GND pins.
• Can I use the LT1785IS8 in a high-temperature environment?
  The LT1785IS8 is rated for operation up to 125°C, but its performance may degrade at high temperatures. Make sure to derate the output current and voltage according to the temperature derating curves in the datasheet.
• How do I calculate the output voltage ripple of the LT1785IS8?
  The output voltage ripple can be estimated using the formula: ΔVout = (Iout * ESL) / (Cout * fsw), where ESL is the equivalent series inductance of the output capacitor, Cout is the output capacitance, and fsw is the switching frequency.
• Can I use the LT1785IS8 in a low-dropout (LDO) configuration?
  No, the LT1785IS8 is not designed for LDO operation. It requires a minimum input-to-output voltage differential of 2.5V to maintain regulation.