A good PCB layout for the MAX9938FEBS+TG45 involves keeping the input and output traces short and separate, using a solid ground plane, and placing the device close to the input filter capacitors. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
The choice of input filter capacitors for the MAX9938FEBS+TG45 depends on the specific application and the desired level of filtering. In general, a 10uF to 22uF ceramic capacitor with a voltage rating of 10V to 16V is a good starting point. The capacitor should be placed as close as possible to the VIN pin of the device.
The MAX9938FEBS+TG45 can handle input voltages up to 16V, but it's recommended to operate the device within the specified operating range of 2.7V to 5.5V to ensure optimal performance and reliability.
To ensure the stability of the MAX9938FEBS+TG45 output voltage, it's recommended to use a minimum output capacitance of 10uF and a maximum equivalent series resistance (ESR) of 1 ohm. Additionally, the output voltage should be decoupled with a 10uF to 22uF ceramic capacitor.
The MAX9938FEBS+TG45 has a thermal derating of 6.4mW/°C, which means that the device's power dissipation should be reduced by 6.4mW for every degree Celsius above the maximum operating temperature of 85°C.
MAX9938FEBS+TG45 datasheet
by Maxim Integrated Products
