LE30ABZ-TR

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With the continuous development of high-tech, the functions of electronic products are becoming more and more diversified and strong, and the types and categories of integrated circuits needed to match them are becoming more and more diverse. In the field of power management integrated circuit (PMIC), voltage regulators play an important role. The main function of the voltage regulator is to maintain the output voltage of the power supply system at a constant level, stabilize the voltage and protect the circuit from damage caused by power supply problems. In this field, the LE30ABZ-TR linear voltage regulator is a typical representative.

The LE30ABZ-TR is a three-terminal low-power linear voltage regulator. The operating voltage is in a wide range of 3V to 15V and the output voltage is adjustable. It has tight load and line oscillation characteristics, stable output voltage and negligible temperature coefficient. LE30ABZ-TR is mainly used in telephone communication, industrial control and other fields.

The working principle of LE30ABZ-TR linear voltage regulator is to compare the internal reference voltage with the output voltage. When the output voltage rises to the reference voltage, the voltage regulator will reduce the output current. According to the different modes of action, the linear regulator can be divided into two types: switch mode and linear mode. Among them, the LE30ABZ-TR is a linear regulator. In the linear operation mode, the internal circuit of the voltage regulator is basically composed of four parts: protected circuit, reference voltage source, control electric current source and voltage amplifier.

First, the reference voltage source provides a fixed voltage as the reference sample. Then, the control electric current passes through a dozen loop outside the reference voltage source, and the other end connects to the internal negative input pin of the voltage amplifier. The resistance between the two ends of the loop is fixed, thus the output control electric current is fixed. The control electric current is inputted internally to the basepin from the negative pin,making the voltage amplifier into a controllable electric current source. Through this circuit, the voltage between the output pin and the negative pin remains constant, thus the output voltage is stable.

In addition to its sophisticated internal circuit, the LE30ABZ-TR linear voltage regulator also has excellent electrical performance. The operating voltage is in the wide range of 3V to 15V, and the typical output current decreases from 2.5A to 0.5A as the output voltage increases. The on-off input voltage is very low, and the power output impedance is also very low. In addition, the low temperature coefficient and low line step ensure the stability of the output voltage.

The LE30ABZ-TR linear voltage regulator has simple operation, high efficiency and excellent electrical performance. It is an ideal component for power supply systems in telephone communication, industrial control and other fields. Therefore, it has been widely used in various electronic products.

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