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 50-ohm transmission lines for signal traces.
Proper biasing is critical for the LMX5453SM/NOPB. Ensure that the VCC pin is connected to a stable 3.3V or 5V power supply, and that the EN pin is tied to a logic high or low depending on the desired operating mode. Also, ensure that the input and output pins are properly terminated to prevent signal reflections.
The LMX5453SM/NOPB is rated for operation from -40°C to 85°C. However, it's recommended to derate the device's performance at higher temperatures to ensure reliable operation.
To troubleshoot issues with the LMX5453SM/NOPB, start by verifying the PCB layout and ensuring that the device is properly biased. Check for signal integrity issues, such as ringing or overshoot, and ensure that the input and output pins are properly terminated. If issues persist, consult the datasheet and application notes for guidance, or contact Texas Instruments support for further assistance.
While the LMX5453SM/NOPB is primarily designed as a low-noise, low-jitter clock oscillator, it can be used in switching regulator applications with some caveats. Ensure that the device is properly biased and that the output frequency is within the recommended range. Additionally, consult the datasheet and application notes for guidance on using the device in switching regulator applications.
LMX5453SM/NOPB datasheet
by Texas Instruments
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