MC34735 - Multicomp Pro

MC34735 Frequently Asked Questions (FAQs)

• What is the recommended layout and placement for the MC34735?
  The recommended layout and placement for the MC34735 involves keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing the distance between the IC and the battery. A 4-layer PCB is recommended, with the top layer for signals, the second layer for the power plane, the third layer for the ground plane, and the bottom layer for the signals.
• How do I optimize the MC34735 for low quiescent current?
  To optimize the MC34735 for low quiescent current, ensure that the EN pin is driven high or low, and not left floating. Also, use a low-value resistor (e.g., 1 kΩ) between the EN pin and the input voltage. Additionally, minimize the input voltage and use a low-dropout linear regulator (LDO) if possible.
• What is the maximum input voltage that the MC34735 can handle?
  The MC34735 can handle input voltages up to 28V, but it's recommended to keep the input voltage below 24V to ensure reliable operation and minimize power dissipation.
• How do I select the right output capacitor for the MC34735?
  Select an output capacitor with a low equivalent series resistance (ESR) and a high ripple current rating. A ceramic capacitor with a value between 10 μF and 22 μF is recommended. The output capacitor should be placed close to the VOUT pin and connected to the ground plane.
• Can I use the MC34735 in a high-temperature environment?
  The MC34735 is rated for operation up to 125°C, but it's recommended to derate the output current and input voltage at high temperatures to ensure reliable operation. A heat sink or thermal pad may be necessary for high-power applications.