The recommended input capacitor value is 1uF to 10uF, depending on the input voltage and output current requirements. A larger capacitor value can help to reduce input voltage ripple and improve output voltage regulation.
To ensure stability, follow the layout guidelines in the datasheet, keep the input and output capacitors close to the device, and use a low-ESR capacitor for the output capacitor. Additionally, ensure that the output capacitor value is within the recommended range and the output voltage is within the specified range.
The maximum output current capability of the MAX891LEUA is 150mA. However, the output current should be derated based on the input voltage, output voltage, and ambient temperature to ensure reliable operation.
The MAX891LEUA is rated for operation up to 125°C. However, the device's performance and reliability may degrade at high temperatures. It is recommended to derate the output current and ensure proper thermal management to prevent overheating.
The dropout voltage of the MAX891LEUA can be calculated using the formula: VDO = VIN - VOUT, where VIN is the input voltage and VOUT is the output voltage. The typical dropout voltage is around 0.5V to 1.5V, depending on the input voltage and output current.
MAX891LEUA datasheet
by Maxim Integrated Products
