SG117K-DESC

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Linear voltage regulators (LVRs) are used to regulate a voltage with respect to a given reference. It serves as an important component in varied systems such as computers, TVs, and other consumer electronics. Furthermore, the LVR can be put in a distributed power system. In such systems, an LVR is required to maintain a high-level voltage that is distributed throughout your system, while also ensuring its accuracy and efficiency. SG117K-DESC is a linear voltage regulator that is widely used in various applications. This article will discuss the application fields and working principle of the SG117K-DESC.

The SG117K-DESC is a low-dropout (LDO) linear regulator. Its input voltage can range between 2V and 15V and the output voltage can range between 0.8V and 14V, making it well suited for a variety of applications. Some of the common usages of the SG117K-DESC include power supplies for digital circuits, data devices, and low-power systems. It can also be used for voltage stabilization in numerous industries, including automotive, medical, radio communication, and aviation. Moreover, the SG117K-DESC can be used in LiPo battery protection and monitor circuits.

The working principle of SG117K-DESC LVR is based on the varying resistance of a programmable band-gap reference circuit and a complementary transistor—known as a voltage follower—that is connected to the programmable circuit. The voltage follower is connected to the output voltage at a dedicated output pin. This reference circuit is connected to its own set of input sources and responds to the varying resistance of the reference circuit by changing the output voltage at the given pin. With the help of the voltage follower, the reference voltage can be compared to a dedicated reference voltage to regulate the voltage applied to the output pin. The result of this process is a controlled output voltage.

Additionally, the SG117K-DESC incorporates a feedback loop to maintain constant output voltage with varying input voltages. This feedback loop is composed of transistors connected to the outlet. When the output voltage is too low with respect to the reference voltage, the transistor acts as a current switch that turns on to close the circuit. This allows current to flow from the input to the output, thus raising the output voltage. Conversely, when the output voltage is too high with respect to the reference voltage, the transistor acts as an open circuit, thus preventing current from flowing from the input to the output.

The SG117K-DESC LVR is designed with a wide range of advanced features. It can provide a maximum continuous output current of 120mA, and it also offers a load regulation of ±2%. It also has a low quiescent current and a high efficiency of up to 87%. Furthermore, it has an extended temperature range between -40°C and +125°C, making it suitable for various temperature conditions. Other advanced features of the SG117K-DESC include adjustable protection circuitry, wide input and output range, low power consumption, short-circuit protection, overcurrent protection, and thermal shutdown.

In conclusion, the SG117K-DESC is an efficient and reliable linear voltage regulator that is suitable for a wide range of applications. It can provide a constant output voltage with varying input voltage, making it ideal for use in distributed power systems and other sensitive applications. Furthermore, it has a number of advanced features such as a low quiescent current, adjustable protection circuitry, wide temperature range, and short-circuit protection, making it an attractive option for many applications.

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