A good PCB layout for optimal thermal performance involves placing the device near a thermal pad or a heat sink, and ensuring good copper pour coverage around the device. Additionally, using a 2-3 layer PCB with a solid ground plane can help to reduce thermal resistance.
To ensure stability and prevent oscillations, it's essential to follow the recommended layout and component selection guidelines in the datasheet. Additionally, using a low-ESR output capacitor, minimizing the output capacitor's equivalent series resistance (ESR), and using a feedback resistor with a low tolerance can help to prevent oscillations.
The maximum input voltage that can be applied to the LMR14206XMKX/NOPB is 42V. Exceeding this voltage can cause damage to the device.
The output voltage ripple and noise can be calculated using the equations provided in the datasheet. The output voltage ripple is primarily dependent on the output capacitor's ESR, while the output noise is dependent on the switching frequency and the output capacitor's capacitance.
The recommended input capacitor type is a ceramic capacitor with a value of 10uF to 22uF. The capacitor should have a voltage rating of at least 50V and a low ESR to minimize input voltage ripple.
LMR14206XMKX/NOPB datasheet
by Texas Instruments
