STMicroelectronics provides a recommended PCB layout in the application note AN4101, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The inductor value depends on the input voltage, output voltage, and switching frequency. STMicroelectronics provides an inductor selection guide in the datasheet, and you can also use online inductor selection tools or consult with an applications engineer for specific guidance.
The L6521TR is rated for operation up to 150°C, but the maximum ambient temperature for reliable operation depends on the specific application and thermal management. It's recommended to keep the junction temperature below 125°C to ensure long-term reliability.
The L6521TR has built-in OVP and UVP features, but you need to add external resistors and capacitors to set the threshold voltages. Refer to the datasheet and application notes for specific implementation guidelines and component values.
STMicroelectronics recommends using a low-ESR ceramic capacitor (X5R or X7R) with a value between 10uF to 22uF, depending on the input voltage and ripple requirements. The capacitor should be placed close to the IC and have a low inductance path to the input pins.
L6521TR datasheet
by STMicroelectronics
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