STMicroelectronics provides a recommended PCB layout in the LE50ABD application note (AN2151) and the datasheet. It's essential to follow the recommended layout to ensure optimal performance, minimize noise, and reduce EMI.
The choice of inductor depends on the specific application, output voltage, and current requirements. STMicroelectronics provides guidelines for inductor selection in the datasheet and application notes. A good starting point is to use an inductor with a high saturation current, low DC resistance, and a suitable inductance value (e.g., 1-10 μH).
The maximum input voltage for the LE50ABD is 28V, but it's recommended to operate within the specified input voltage range (7-18V) for optimal performance and reliability.
The LE50ABD has a built-in OVP feature, but it's recommended to add an external OVP circuit to protect the device from voltage spikes or surges. A simple OVP circuit can be implemented using a zener diode, resistor, and a transistor.
The thermal derating for the LE50ABD is typically around 1.5-2°C/W, depending on the specific package and operating conditions. It's essential to ensure proper thermal management, such as using a heat sink or thermal pad, to prevent overheating and ensure reliable operation.
LE50ABD datasheet
by STMicroelectronics
