A good PCB layout for the LME49860MA/NOPB involves keeping the input and output traces short and symmetrical, using a solid ground plane, and placing the decoupling capacitors close to the device. A 4-layer PCB with a dedicated power plane and a solid ground plane is recommended.
The output filter components (Rout, Cout, and Lout) should be chosen based on the desired output impedance, output voltage, and output current. A good starting point is to use the values recommended in the datasheet, and then adjust them based on the specific application requirements.
The maximum power dissipation of the LME49860MA/NOPB is dependent on the ambient temperature and the thermal resistance of the package. According to the datasheet, the maximum power dissipation is 2.5W at 25°C ambient temperature. However, this value can be derated based on the actual operating conditions.
To ensure stability in the feedback loop, it is essential to follow the recommended compensation network values and layout guidelines. Additionally, the feedback resistors and capacitors should be chosen to ensure a stable gain margin and phase margin.
The recommended input voltage range for the LME49860MA/NOPB is 4.5V to 36V. Operating the device outside of this range may affect its performance and reliability.
LME49860MA/NOPB datasheet
by Texas Instruments
