The maximum input voltage is 26V, but it's recommended to keep it below 24V for reliable operation.
To ensure stability, use a minimum output capacitance of 10uF with an ESR of 0.1-10 ohms, and keep the input capacitance as close to the regulator as possible.
The dropout voltage is typically around 1.5V, but it can be as low as 1.2V at low currents.
Yes, the device is rated for operation up to 125°C, but the output current may need to be derated at higher temperatures to prevent overheating.
Use a TVS diode or a transient voltage suppressor in parallel with the input capacitor to protect the regulator from voltage spikes and transients.