Texas Instruments provides a recommended PCB layout in the datasheet, but it's also recommended to follow general best practices for low-noise, high-frequency PCB design, such as using a solid ground plane, minimizing trace lengths, and using bypass capacitors.
To ensure stability, follow the recommended compensation network and component values, and make sure the output capacitor is properly sized. Additionally, ensure the input and output capacitors are placed close to the device and the PCB layout is well-designed to minimize parasitic inductance and capacitance.
The maximum input voltage is not explicitly stated in the datasheet, but it's generally recommended to keep the input voltage within the specified operating range (2.2V to 5.5V) to ensure reliable operation and prevent damage to the device.
The LMR10530 is rated for operation up to 125°C, but it's essential to consider the device's thermal characteristics, such as junction temperature and thermal resistance, when designing for high-temperature applications. Ensure proper heat sinking and thermal management to prevent overheating.
Start by verifying the input voltage, output load, and PCB layout. Check for proper component values, soldering, and connections. Use an oscilloscope to monitor the output voltage and current, and consult the datasheet and application notes for troubleshooting guidelines.