Generally the input voltage of FPV cameras is 7~13V - with a 4S LiPo input, the Matek linear regulator can convert 14~17V to 12V, and power camera and/or 12V 1W LEDs without ripples or noise.
The Matek Micro BEC 6-30V is a syncronous step-down converter with selectable 5V or 9V output (default 5V). The Matek Micro BEC is rated for 1.5A continuous and 2.5A burst.