The MAX859ESA+ is a high-frequency device, so it's essential to follow good layout practices to minimize noise and ensure proper operation. Keep the input and output traces short and away from each other, and use a solid ground plane to reduce noise. Place the device close to the power source and use a decoupling capacitor (e.g., 10uF) between VCC and GND.
The output capacitor value depends on the desired output voltage ripple, output current, and stability. A general rule of thumb is to use a capacitor with a value between 10uF to 47uF, with a voltage rating of at least 2x the output voltage. For example, for a 5V output, use a 10uF to 47uF capacitor with a 10V or higher voltage rating.
The MAX859ESA+ has an absolute maximum input voltage rating of 7V. However, it's recommended to operate the device within the specified input voltage range of 2.7V to 5.5V to ensure proper operation and prevent damage.
The MAX859ESA+ is rated for operation up to 125°C (TJ). However, the device's performance and reliability may degrade at high temperatures. It's essential to follow proper thermal design and heat dissipation techniques to ensure the device operates within its specified temperature range.
To ensure stability, follow the recommended layout and placement guidelines, and use a suitable output capacitor value. Additionally, make sure the input voltage is within the specified range, and the device is properly decoupled. If oscillation occurs, try adding a small ceramic capacitor (e.g., 10nF) between the output and ground.
MAX859ESA+ datasheet
by Maxim Integrated Products
