The MAX1811ESA requires careful layout and placement to minimize noise and ensure optimal performance. It is recommended to place the device close to the battery, use a solid ground plane, and keep the input and output traces separate to minimize noise coupling. Additionally, it is recommended to use a 10uF ceramic capacitor at the input and a 22uF ceramic capacitor at the output to filter out noise and ripple.
The inductor value selection depends on the input voltage, output voltage, and output current requirements. A general rule of thumb is to choose an inductor with a value between 1uH to 10uH. A higher inductor value can provide better filtering, but may also increase the size and cost of the component. It is recommended to use the Maxim Power Designer tool or consult the application note AN4341 to determine the optimal inductor value for your specific design.
The MAX1811ESA is rated for operation from -40°C to +85°C. However, the device can operate up to +125°C with derating. It is recommended to consult the datasheet and application notes for more information on thermal considerations and derating guidelines.
To ensure stability, it is recommended to follow the layout and placement guidelines, use the recommended component values, and ensure that the input and output capacitors are properly selected. Additionally, it is recommended to add a small resistor (e.g. 1kΩ) in series with the feedback pin to prevent oscillation. It is also recommended to consult the application note AN4341 for more information on stability and oscillation prevention.
The MAX1811ESA is rated for operation from 2.5V to 5.5V. However, the device can tolerate input voltages up to 6V for short durations (e.g. during startup or fault conditions). It is recommended to consult the datasheet and application notes for more information on input voltage range and tolerance.
MAX1811ESA datasheet
by Maxim Integrated Products
