LTC3859ALEUHF#PBF datasheet by Linear Technology

LTC3859ALEUHF#PBF Frequently Asked Questions (FAQs)

• What is the maximum input voltage that can be applied to the LTC3859ALEUHF?
  The maximum input voltage that can be applied to the LTC3859ALEUHF is 60V, but it's recommended to keep it below 55V for reliable operation.
• How do I optimize the layout for the LTC3859ALEUHF to minimize EMI?
  To minimize EMI, it's recommended to keep the input and output capacitors close to the IC, use a solid ground plane, and keep the high-frequency switching nodes (e.g. SW and VIN) away from sensitive analog nodes.
• What is the recommended PCB thermal design for the LTC3859ALEUHF?
  A minimum of 2oz copper thickness is recommended for the PCB, and thermal vias should be used to connect the IC's thermal pad to a solid ground plane. A heat sink may also be necessary for high-power applications.
• How do I select the right inductor for the LTC3859ALEUHF?
  The inductor selection depends on the output voltage, output current, and switching frequency. A good starting point is to use an inductor with a saturation current rating of at least 1.5 times the maximum output current, and a DC resistance (DCR) of less than 100mΩ.
• What is the maximum ambient temperature rating for the LTC3859ALEUHF?
  The maximum ambient temperature rating for the LTC3859ALEUHF is 125°C, but the junction temperature (TJ) should be kept below 150°C for reliable operation.