The recommended layout and placement for the MC34717EP involves placing the device close to the battery, using a solid ground plane, and keeping the input and output capacitors close to the device. 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.
To optimize the performance of the MC34717EP, ensure that the input voltage is within the recommended range, use a low-ESR input capacitor, and minimize the trace length and resistance between the device and the input/output capacitors. Additionally, use a low-impedance output capacitor and ensure that the output voltage is within the recommended range.
The MC34717EP has a thermal shutdown feature that turns off the device when the junction temperature exceeds 150°C. To minimize thermal issues, ensure good airflow around the device, use a heat sink if necessary, and avoid blocking the thermal pads on the package.
To troubleshoot issues with the MC34717EP, check the input voltage, output voltage, and current consumption. Verify that the device is properly configured and that the input/output capacitors are properly sized. Use an oscilloscope to check for oscillations or noise on the output, and ensure that the device is not overheating.
To minimize EMI issues with the MC34717EP, use a shielded inductor, keep the input/output traces short and away from sensitive circuits, and use a common-mode choke if necessary. Ensure that the device is properly decoupled and that the PCB layout is optimized for EMI reduction.
MC34717EP datasheet
by Freescale Semiconductor
