SPX1117M3-L-1-8/TR Integrated Circuits (ICs)

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Linear voltage regulators are one of the most common types of power management integrated circuits (PMIC) used when converting power sources from varying voltage to a steady, consistent and coherent amount of power. The SPX1117M3-L-1-8/TR is an example of a linear voltage regulator that offers a low ground current while still being able to regulate input voltage to programmable output voltage level.

General Specifications of the SPX1117M3-L-1-8/TR

The SPX1117M3-L-1-8/TR is a low-dropout (LDO) linear voltage regulator which can be used in a wide range of applications. Specifically, it can regulate AC or DC power input from 4.75V up to 20V to a fixed or adjustable voltage output from 0.8V to 3.3Vdc. The voltage drop for this device is guaranteed to remain below 1.8V when measured at an output current of 1.2A. Additionally, the SPX1117M3-L-1-8/TR is equipped with a thermal shutdown feature which will trip off in case the device encounters extreme temperature conditions.

The quiescent current of the SPX1117M3-L-1-8/TR is particularly low. This is beneficial when using the device in a battery powered system as less power is being used while the device is sitting idle. The SPX1117M3-L-1-8/TR also has a high precision tolerance of ±5mV which allows it to exert great accuracy in output current measurement.

Application Fields and Working Principle

The SPX1117M3-L-1-8/TR is well suited for applications in computers, notebooks, PDA’s, mobile phones, medical instruments, and any other embedded system that requires a constant voltage for power management. An example of a practical application for the SPX1117M3-L-1-8/TR, is a computer system that requires a regulated +12V in order to function properly. Without the voltage regulation from the SPX1117M3-L-1-8/TR, the computer\'s internals can be damaged or destroyed from improper or inconsistent power.

The working principle of the SPX1117M3-L-1-8/TR depends primarily on the voltage drop across its internal transistor. When the power load pulls current, the internal transistor will drop a certain voltage and begin to regulate the output voltage. The voltage drop across the internal transistor is what allows the SPX1117M3-L-1-8/TR to remain as a linear regulator and provide a steady output voltage.

Other features of the SPX1117M3-L-1-8/TR include short-circuit and over-current protection. This is for extra safety measures in the event that the output current and resulting loads exceed the specifications. This will ensure that the device’s output voltage stays regulated and the system remains functional even in the face of extreme loads.

Conclusion

The SPX1117M3-L-1-8/TR is an excellent linear voltage regulator that offers many useful features to modern electronic systems that require strict voltage regulation. Its low quiescent current makes it suitable for use with battery powered system while its high precision tolerance and internal protection circuits make it a great choice for sustaining reliability and accuracy. Its wide input voltage range also means it can be used in a multitude of applications. The SPX1117M3-L-1-8/TR, is truly a great linear voltage regulator for numerous PMIC applications.

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