STMicroelectronics recommends a 2-layer or 4-layer PCB with a solid ground plane and a thermal relief pattern under the package to ensure optimal thermal performance.
To ensure reliable operation in high-temperature environments, it is recommended to derate the output current and voltage according to the thermal derating curve provided in the datasheet, and to ensure good thermal conduction between the device and the heat sink or PCB.
STMicroelectronics recommends using X7R or X5R ceramic capacitors with a voltage rating of at least 2x the input voltage, and a capacitance value of 10uF to 22uF for the input capacitor, and 10uF to 47uF for the output capacitor.
To protect the device from overvoltage and undervoltage conditions, it is recommended to use a voltage supervisor or a power-on reset circuit to monitor the input voltage and reset the device if it falls outside the recommended operating range.
The recommended start-up sequence for the TS9222IPT is to first apply the input voltage, then enable the device by setting the EN pin high, and finally apply the output load.
TS9222IPT datasheet
by STMicroelectronics
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