Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general high-frequency PCB design guidelines, such as using a solid ground plane, minimizing trace lengths, and using bypass capacitors to reduce noise and ringing.
The LM5111-1MYX/NOPB has a thermal pad on the bottom of the package, which should be connected to a thermal plane on the PCB. Ensure good thermal conductivity by using a thermal interface material (TIM) and a heat sink if necessary. Also, follow the recommended operating temperature range and power dissipation guidelines.
The maximum allowable voltage on the input pins is the supply voltage (VCC) plus 0.3V. Exceeding this voltage can cause damage to the device. Ensure that the input voltage is within the recommended operating range to prevent damage.
Start by verifying the PCB layout and ensuring that it follows the recommended guidelines. Check the power supply voltage and decoupling capacitors. Use an oscilloscope to measure the output voltage and current, and look for signs of oscillation or instability. Consult the datasheet and application notes for troubleshooting guidelines and potential solutions.
The LM5111-1MYX/NOPB is a commercial-grade device, but it can be used in high-reliability or automotive applications with proper design and testing. Ensure that the device is operated within its recommended operating conditions, and follow the guidelines for reliability and automotive applications provided in the datasheet and application notes.
LM5111-1MYX/NOPB datasheet
by Texas Instruments
