Linear Technology LT1521IST-3#TRPBF Current - Limit (min): 320mA Current - Output: 300mA Mounting Type: Surface Mount Number Of Regulators: 1 Operating Temperature: -40?°C ~ 125?°C Package / Case: SOT-223 (3 leads + Tab), SC-73, TO-261 Regulator Topology: Positive Fixed Series: - Voltage - Dropout (typical): 0.5V @ 300mA Voltage - Input: 4.3 ~ 20 V Voltage - Output: 3V