The maximum input voltage that the LT1639CS#PBF can handle is 80V, but it's recommended to operate it within the specified input voltage range of 3.5V to 80V for optimal performance.
To ensure stability, make sure to follow the recommended layout and component selection guidelines in the datasheet, and use a minimum output capacitance of 10uF with an ESR of 0.1 ohms or less.
The maximum output current that the LT1639CS#PBF can provide is 3A, but it's recommended to operate it within the specified output current range of 0A to 2A for optimal performance and reliability.
The output voltage of the LT1639CS#PBF can be adjusted by using a resistive divider network between the output and the feedback pin, and by selecting the appropriate resistors according to the desired output voltage.
The EN (enable) pin on the LT1639CS#PBF is used to enable or disable the regulator. When the EN pin is pulled high, the regulator is enabled, and when it's pulled low, the regulator is disabled.