The recommended PCB layout for the MAX3874AEGJ involves keeping the input and output capacitors close to the device, using a solid ground plane, and minimizing the length of the traces between the device and the capacitors. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane to reduce noise and EMI.
The selection of input and output capacitors for the MAX3874AEGJ depends on the specific application requirements. In general, it's recommended to use low-ESR capacitors with a value of 10uF to 22uF for the input capacitor and 22uF to 47uF for the output capacitor. The capacitor voltage rating should be at least 1.5 times the maximum input voltage.
The MAX3874AEGJ has an operating ambient temperature range of -40°C to +85°C. However, the device can operate up to +125°C with derating. It's recommended to consult the datasheet for specific derating information.
To ensure the MAX3874AEGJ is stable and doesn't oscillate, it's recommended to follow the recommended PCB layout, use the correct input and output capacitors, and ensure that the input voltage is within the specified range. Additionally, it's recommended to add a small ceramic capacitor (e.g. 10nF) between the VIN pin and the GND pin to improve stability.
The MAX3874AEGJ has a maximum output current capability of 1.5A. However, the actual output current capability may be limited by the input voltage, output voltage, and ambient temperature. It's recommended to consult the datasheet for specific information on output current capability.
MAX3874AEGJ datasheet
by Maxim Integrated Products
