LT1185IQ#TRPBF

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The LT1185IQ#TRPBF is a low drop-out precision three-terminal positive adjustable regulator. This family of regulators offers exceptionally low dropout voltages, making them an ideal choice for systems with an input-output voltage differential of less than one volt. The device is well-suited for microprocessor and low voltage powered systems with space saving needs. In this article, we will discuss the application field and working principle of the LT1185IQ#TRPBF.

Applications of the LT1185IQ

The LT1185IQ series can be used in a wide range of applications, including microprocessor power supplies, voltage clamping, battery charging and portable medical equipment. The low dropout voltage makes them well-suited for applications that require a very small difference between the input and output voltages. The high output accuracy, low noise, and low quiescent current make it an ideal choice for precision power supplies. The wide input voltage range also makes it a good choice for industrial applications, where it can provide a regulated output voltage in a wide variety of input sources.

Working Principle of the LT1185IQ

The LT1185IQ is a three-terminal positive adjustable regulator. The device consists of a PNP transistor and an NPN transistor that form the core of the device. The input terminal of the regulator is connected to the base of the PNP transistor and the output terminal is connected to the collector of the NPN transistor. The output voltage of the device can be adjusted via a potentiometer connected to the adjust terminal. The output voltage is set by comparing the voltage at the output terminal to a reference voltage. When the output voltage drops below the set voltage, the PNP transistor will turn off and the NPN transistor will turn on. This increases the current that is flowing through the output terminal and increases the voltage until the set voltage is reached. The current flowing through the output terminal is limited by an internal current limiter, which prevents the output voltage from exceeding the set voltage.

Conclusion

The LT1185IQ is a low drop-out precision three-terminal positive adjustable regulator. It is well-suited for applications that require a very small difference between the input and output voltages, such as microprocessor power supplies, voltage clamping, battery charging and portable medical equipment. The device is also highly reliable and incorporates an internal current limiter for protection against overload conditions. The low dropout voltage and wide input voltage range make the LT1185IQ an ideal choice for applications requiring precision power supplies.

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