datasheetsc4215SC 4215 has more variant like SC 4215I, SC 4215A etc.
SC 4215 is LDO Regulator with Enable pin and V Out adjustable to very close V IN.
According to Wikipedia :
A low-dropout or LDO regulator is a DC linear voltage regulator that can regulate the output voltage even when the supply voltage is very close to the output voltage
SC 4215 applicable for
-Telecom/networking cards
-Motherboards/peripheral cards
-Industrial applications
-Wireless infrastructure
-Set-top boxes
-Medical equipment
-Notebook computers
-Battery-powered systems
-TV LCD
Pinout SC 4215
For complete pinout , please Download Datasheet SC4215
Application circuit