AH1117CLTR25

AH1117 is a series of low dropout three-terminal regulators with a typical dropout of 1.3V at 1A load current. Besides fixed voltage version (Vout = 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V), AH1117 has an adjustable version that can provide an output voltage from 1.25 to 12V with two external resistors. AH1117 offers thermal shut down functions to assure stability of chip and power system. Trimming technique is used to guarantee output voltage accuracy within ±2%. AH1117 is available in SOT-223, TO-252 power packages. AH1117 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

• DVB
• Computer Mother Board, Graphic Card
• LCD Monitor and LCD TV
• DVD Decode Board
• ADSL Modem
• Post Regulators for Switching Supplies

Key features

• Maximum output current is 1A
• Range of operation input voltage: Max 15V
• Line regulation: 0.1%/V (typ.)
• Load regulation: 10mV (typ.)
• Environment Temperature: -20°C~85°C