A good PCB layout is crucial for the LT3420EMS-1#PBF. It's recommended to follow the layout guidelines provided in the datasheet, including keeping the input and output capacitors close to the IC, using a solid ground plane, and minimizing trace lengths and widths to reduce EMI and noise.
To ensure the device operates within the recommended operating conditions, make sure to follow the absolute maximum ratings, operating ratings, and electrical characteristics specified in the datasheet. This includes voltage, current, and temperature ratings.
The recommended input capacitor type is a low-ESR ceramic capacitor with a value of 10uF to 22uF. This helps to filter out noise and ripple on the input voltage.
The output voltage ripple and noise can be calculated using the equations provided in the datasheet. The output voltage ripple is typically specified as a percentage of the output voltage, and the noise is specified in terms of RMS voltage.
The thermal derating curve for the LT3420EMS-1#PBF is provided in the datasheet. It shows the maximum power dissipation vs. ambient temperature, and is used to determine the maximum output current at a given temperature.
LT3420EMS-1#PBF datasheet
by Linear Technology
