SCJT1117B-3.3-A

The SCJT1117B-XXX-A is a series of low dropout three-terminal regulators with a dropout of 1.3V(typ.) at 1A output current. The SCJT1117B-XXX-A series provides current limiting and thermal shutdown. Its circuit includes a trimmed bandgap reference to assure output voltage accuracy to be within 2%. Current limit is trimmed to ensure specified. Output current and controlled short-circuit current. On-chip thermal shutdown provides protection against any combination of overload and ambient temperature that would create excessive junction temperature. The SCJT1117B-XXX-A has an adjustable version, that can provide the output voltage from 1.25V to 12V with only 2 external resistors. SCJT1117B-XXX-A is a series of low dropout voltage, three terminal regulators. Its application circuit is very simple: the fixed version only needs two capacitors and the adjustable version only needs two resistors and two capacitors to work. It is composed of some modules including start-up circuit, bias circuit, bandgap, thermal shutdown, power transistors and its driver circuit and so on. The thermal shut down modules can assure chip and its application system working safety when the junction temperature is larger than 140°C. The bandgap module provides stable reference voltage, whose temperature coefficient is compensated by careful design considerations. The temperature coefficient is under 100 ppm/°C. And the accuracy of output voltage is guaranteed by trimming technique.

Applications

• PC Motherboard
• LCD Monitor
• Graphic Card
• DVD-Video Player
• NIC/Switch
• Telecom Modem
• ADSL Modem
• Printer and Other Peripheral Equipment

Key features

• Low Dropout Voltage: 1.3V(typ.) at 1A Output Current
• Trimmed Current Limit
• On-Chip Thermal Shutdown
• Three-Terminal Adjustable or Fixed 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V Operation
• Junction Temperature: -20°C to 125°C