The MAX544ACSA+ requires a careful PCB layout to minimize noise and ensure proper operation. Maxim Integrated provides a recommended layout in the datasheet, which includes keeping the input and output traces separate, using a solid ground plane, and placing decoupling capacitors close to the device. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
The MAX544ACSA+ has a relatively high output voltage ripple and noise due to its switching nature. To minimize this, use a low-ESR output capacitor, such as a ceramic or film capacitor, and add a post-regulator filter stage if necessary. Additionally, ensure the input voltage is well-regulated and use a low-noise input capacitor.
Although the datasheet specifies a maximum input voltage of 5.5V, the device can handle up to 6V for short periods of time. However, it's recommended to operate the device within the specified input voltage range to ensure reliability and prevent damage.
To ensure stability, follow the recommended layout and PCB design guidelines, use a low-ESR output capacitor, and add a compensation capacitor (Ccomp) between the COMP pin and GND. The value of Ccomp depends on the output voltage and load current; refer to the datasheet for calculation guidelines.
The MAX544ACSA+ can deliver up to 1A of output current, but this depends on the input voltage, output voltage, and ambient temperature. Refer to the datasheet for the output current derating curves to determine the maximum output current for your specific application.
MAX544ACSA+ datasheet
by Maxim Integrated Products
