SCJT1117B-ADJ-A

The SCJT1117B-A series is a group of low dropout three-terminal regulators with a dropout of 1.3V(typ.) at 1A output current. The SCJT1117B-A series is available in an adjustable version, which can set the output voltage from 1.25V to 12V with only two external resistors. In addition, it is available in five fixed voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V. The SCJT1117B-A series offer thermal shutdown protection. Its circuit includes a Zener trimmed bandgap reference to assure output voltage accuracy to within ±2%. A minimum of 10μF tantalum capacitor is required at the output to improve the transient response and stability. 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
• Thermal Shutdown
• Three-Terminal Adjustable to 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V
• Operation Junction Temperature: -40°C to 125°C
• Space-saving SOT-223 packages