STMicroelectronics provides a recommended PCB layout in their application note AN5046, which includes guidelines for thermal pad connection, copper pouring, and via 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 at least 1.5 times the input voltage, and a capacitance value between 1uF to 10uF. Refer to the application note AN4760 for more detailed guidance.
The enable pin (EN) has a maximum allowed voltage of 6V, which is not explicitly stated in the datasheet. Exceeding this voltage may damage the device.
To ensure a stable operating condition during startup, it's recommended to add a soft-start circuit or a ramp-up circuit to the input voltage. This helps to prevent inrush currents and ensures a smooth transition to the regulated output voltage.
The minimum ESR requirement for the output capacitor is not explicitly stated in the datasheet. However, a general guideline is to choose an output capacitor with an ESR less than 1 ohm to ensure stability and optimal performance.
