The AL1117 is a low voltage differential three terminal regulator with a voltage drop of 1.3V at a 1A load current. The standby current of AL1117 is very low, ranging from 2mA to 5mA. In addition to the fixed version of the AL1117 output voltage (Vout=1.2V, 1.5V, 1.8V, 2.5V, 2.85V, 3.3V, and 5V), there is also an adjustable version that can provide an output voltage of 1.25 to 12V with only two external resistors.
The AL1117 provides a thermal shutdown function to ensure the stability of the chip and power supply system. It uses fine tuning technology to ensure an output voltage accuracy of 2%. Other output voltage accuracy can be customized as needed, such as 1%. AL1117 provides two packaging methods: SOT-223 and TO-252.
AL1117 Features:
Maximum output current: 1A
Maximum voltage of working input: 15V
Line adjustment rate: 0.03%/V (typ)
ESD HBM：8KV
Standby current: 2mA (typ)
Load adjustment rate: 0.2%/A (typ)
Working temperature: - 20 ℃~85 ℃
AL1117 is a low pressure differential three terminal regulator. Its application circuit is very simple: the fixed version only requires two capacitors, while the adjustable version only requires two resistors and two capacitors to work. It is composed of some modules including a startup circuit, a bias circuit, a bandgap, a thermal shutdown, a power transistor, and a drive circuit. The thermal shutdown module can ensure that the junction temperature of the chip and its application system is greater than 180 ° C. The bandgap module provides a stable reference voltage, and its temperature coefficient is carefully designed to compensate for other considerations. The temperature coefficient is below 100 ppm/° C, and the accuracy of the output voltage is guaranteed by fine tuning technology.
AL1117 Application Scenario:
