STMicroelectronics recommends a 4-layer PCB with a solid ground plane, and to keep the analog and digital grounds separate. Additionally, it's recommended to use a common mode filter and to keep the input and output tracks as short as possible.
To optimize the TS4990IQT for low power consumption, it's recommended to use the lowest possible supply voltage, disable the internal voltage regulator, and use the power-down mode when not in use. Additionally, reducing the switching frequency and using a low-power mode can also help reduce power consumption.
The maximum allowed capacitance for the output filter is 10uF. Exceeding this value may cause instability in the output voltage.
To ensure the TS4990IQT is stable and reliable in high-temperature environments, it's recommended to use a heat sink, ensure good airflow, and to derate the device's power dissipation according to the temperature derating curve provided in the datasheet.
The recommended input voltage range for the TS4990IQT is 2.5V to 5.5V. Operating the device outside of this range may affect its performance and reliability.
TS4990IQT datasheet
by STMicroelectronics
