LM137KG-MW8

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The LM137KG-MW8 is a monolithic adjustable voltage regulator, belonging to the linear category of PMIC (Power Management Integrated Circuit) voltage regulators. It is designed to provide a wide range of power regulation and to do so with high accuracy. The LM137KG-MW8 is a versatile three-terminal regulator that is well-suited for a broad range of applications, and is available in adjustable, 2.0 A, 1.5 A, 1.25 A and 0.5A versions.

The LM137KG-MW8\'s operating voltage ranges from 1.2 V to 37 V. It can supply up to 1.5 A of output current and its output voltage can be programmed using two external resistors. It also offers comprehensive over-temperature and current protection. The LM137KG-MW8 also offers good stability and excellent line and load regulation.

In terms of power supply applications, the LM137KG-MW8 is widely used as Post-Regulator and Standby Supply for high efficiency switching supplies. This is due to its adjustable outputs, foldback current limiting and thermal shutdown protection. The LM137KG-MW8 is also commonly used in battery and power management systems, automotive systems and anywhere needing reliable and precise voltage regulation.

In addition to its wide range of functionality and applications, the LM137KG-MW8 also possesses a working principle that enables it to carry out its tasks. Basically, the LM137KG-MW8 is a three-terminal adjustable voltage regulator that uses an external reference voltage and, as a reference, two resistors that set the output voltage. It also has an internal pass element to regulate the output voltage, an adjustable error amplifier and an output slot.

The working principle of the LM137KG-MW8 can be divided into the following steps. The DAC (digital-to-analog converter) feeds a reference voltage to the non-inverting input of the error amplifier. The resistor divider formed by R1 and R2 connected to the output voltage determines the voltage at the inverting input of the error amplifier. When the voltage difference between the two inputs of the error amplifier is zero, the output voltage of the LM137KG-MW8 is equal to the reference voltage.

The output voltage is controlled by comparing the input voltage divided by resistor values R1 and R2 with a reference voltage generated by the DAC. When the difference between these two voltages is not zero, the output voltage is adjusted accordingly. This is accomplished by the error amplifier which amplifies the voltage difference voltage difference (or the error voltage) and drives the PMOS transistor (or the pass element) to adjust the output voltage to the desired level.

This is the basic circuit principle of the LM137KG-MW8. In summary, it is a monolithic adjustable voltage regulator that combines a wide range of features and potential applications with a working principle that provides accurate and reliable voltage regulation.

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