A good PCB layout for the LM5101AMRX/NOPB involves keeping the input and output traces short and wide, using a solid ground plane, and placing the input and output capacitors close to the device. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure stability, make sure to follow the recommended component values and PCB layout guidelines. Additionally, ensure that the input and output capacitors are of high quality and have low ESR. It's also recommended to add a small resistor (e.g. 10 ohms) in series with the output capacitor to dampen any oscillations.
The LM5101AMRX/NOPB can handle input voltages up to 42V, but it's recommended to keep the input voltage below 36V to ensure reliable operation and to prevent damage to the device.
The LM5101AMRX/NOPB 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. Additionally, ensure that the device is properly heatsinked to prevent overheating.
To troubleshoot issues with the LM5101AMRX/NOPB, start by checking the input voltage, output voltage, and output current. Use an oscilloscope to check for oscillations or noise on the output. Also, check the PCB layout and component values to ensure they match the recommended values. If the issue persists, consult the datasheet and application notes for further guidance.
LM5101AMRX/NOPB datasheet
by Texas Instruments
