STMicroelectronics provides a recommended PCB layout in the application note AN5096, which includes guidelines for thermal pad connection, thermal vias, and copper pouring to ensure optimal thermal performance.
The input capacitor selection depends on the input voltage, output voltage, and output current. A general guideline is to choose a capacitor with a voltage rating of at least 1.5 times the input voltage, and a capacitance value between 1uF to 10uF. Refer to the application note AN5096 for more detailed guidance.
The maximum allowed voltage on the enable pin (EN) is 6V, as specified in the datasheet. Exceeding this voltage may damage the device.
The TSH22ID is rated for operation up to 150°C, but the device's performance and reliability may degrade at high temperatures. It's essential to consider the thermal management and derate the output current accordingly to ensure reliable operation.
Start by checking the input voltage, output voltage, and output current. Verify that the enable pin (EN) is properly biased and that the device is not overheating. Consult the datasheet and application notes for troubleshooting guidelines, and consider using STMicroelectronics' evaluation boards and software tools for debugging.