STMicroelectronics provides a recommended PCB layout in the application note AN5323, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The input capacitor selection depends on the input voltage, current, and frequency. A general guideline is to choose a capacitor with a voltage rating higher than the maximum input voltage, a capacitance value between 1-10uF, and a low ESR (Equivalent Series Resistance) to minimize voltage ripple and ensure stable operation.
The TMMBAT48 can operate within a temperature range of -40°C to 125°C, but the maximum junction temperature (TJ) should not exceed 150°C. It's essential to ensure proper thermal management and heat dissipation to prevent overheating and ensure reliable operation.
OVP can be implemented using an external voltage supervisor or a dedicated OVP IC. The voltage supervisor can be connected to the input voltage and trigger a shutdown signal to the TMMBAT48 when the input voltage exceeds a predetermined threshold. Alternatively, a dedicated OVP IC can be used to provide a more precise and adjustable OVP function.
The output capacitor value and type depend on the output voltage, current, and ripple requirements. A general guideline is to choose a capacitor with a capacitance value between 1-10uF, a voltage rating higher than the output voltage, and a low ESR to minimize voltage ripple and ensure stable operation. Ceramic or polymer capacitors are recommended due to their low ESR and high reliability.
TMMBAT48 datasheet
by STMicroelectronics
