LR1117CS12X

LR1117C is a series of low dropout thre-e terminal regulators with a dropout of 1.3V at 1A load current. LR1117C features a very low standby current 2mA compared to 5mA of competitor. Other than a fixed version, Vou I = 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V, and 12V, LR1117C has an adjustable version, which can provide an output voltage from 1.25 to 12V with only two external resistors. LR1117C offers thermal shut down and current limit functions, to assure the stability of chip and power system. And it uses trimming technique to guarantee output voltage accuracy within ±2%. Other output voltage accuracy can be customized on demand, such as ±1%. LR1117C is available in SOT223 and TO - 252 (DPAK) power packages. LR1117C 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, current limit, 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

• Power Management for Computer Mother Board, Graphic Card
• BLD Monitor and BLD TV
• DVD Decode Board
• ADSL Moderm Post Regulators for Switching Supplies

Key features

• Other than a fixed version and an adjustable version, output value can be customized on demand.
• Maximum output current is 1A
• Range of operation input voltage: Max 15V
• Standby current: 2mA (typ.)
• Line regulation: 0.1%/ν (typ.)
• Load regulation: 10mV (typ.)
• Environment Temperature: -40°C ~ 85°C