This is a very popular adjustable linear voltage regulator used everywhere. The only catch is that a lot of heat sinking is required if you have a large current load and a large delta between VIN and VOUT
Voltage In: >= 28V
Standard Voltages Out: 1.2V to 37V
Current Out: 1.5A
Highlights: Requires no caps unless the load is greater than 6 inches from supply.