STMicroelectronics provides a recommended PCB layout in the application note AN4566, which includes guidelines for thermal vias, copper pours, and component placement 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 10uF to 100uF. Refer to the application note AN4566 for more detailed guidance.
The maximum allowed voltage drop across the internal switch is typically around 1.5V to 2V, depending on the operating conditions. Exceeding this voltage drop may lead to reduced efficiency, increased heat generation, or even damage to the device.
To ensure the L5150CJ operates within the SOA, monitor the input voltage, output current, and junction temperature. Avoid operating the device near the maximum ratings, and ensure proper thermal management and PCB design. Refer to the datasheet and application notes for more information.
The recommended output capacitor type is a low-ESR ceramic or film capacitor. The value depends on the output voltage and current, but a general guideline is to use a capacitor with a value between 10uF to 47uF. Refer to the application note AN4566 for more detailed guidance.
L5150CJ datasheet
by STMicroelectronics
