S-1313A22-A4T1U3

Introduction

The S-1313A22-A4T1U3 is a linear voltage regulator that provides excellent power supply stability, line and load regulation and ripple rejection performance. It is a 3-terminal voltage regulator capable of delivering up to 25V of output voltage, with a maximum output current range from 0.5A to 2A. It is also a very cost effective and energy efficient solution for a wide range of applications.

Application Field

S-1313A22-A4T1U3 is an ideal solution for applications that require high precision, small size and low power consumption, such as cameras and video equipment, medical equipment, handheld electronics, automotive systems, and portable devices. With its very low quiescent current, it can also be used in battery powered, standby and light load applications. It also provides protection to devices against voltage overloads, thermal overloads, and reverse current protection.

Working Principle

The S-1313A22-A4T1U3 consists of an integrated chip in a TO-220-3L package, which consists of a signal-controlled current source and a voltage regulator. The voltage regulator consists of two main components, an internal error amplifier and a pass transistor. The signal-controlled current source is a high performance current limited element which regulates the current flowing through the pass transistor to the output. This current source provides the proper driving force to the pass transistor, allowing it to remain in the linear region of operation, where the output voltage is almost perfectly proportional to the current. The error amplifier is responsible for maintaining the output voltage in a linear region. It amplifies the difference between the reference voltage and the output voltage and feeds it to the current limit element, in order to control the output voltage.

The current limit element is the main control element of the voltage regulator. It works by restricting the current to the pass transistor. When the current through the pass transistor exceeds the set limit, the current source is disabled and the output voltage is reduced. This element also helps to prevent any sudden surge in input voltage from affecting the output voltage. The internal error amplifier is responsible for minimizing the difference between the reference voltage and the output voltage. When the difference is too large, the amplifier will increase the current limit so as to reduce the difference.

Conclusion

The S-1313A22-A4T1U3 linear voltage regulator offers excellent power supply stability, line and load regulation and ripple rejection performance. It is an ideal solution for applications that require high precision, small size and low power consumption, such as cameras and video equipment, medical equipment, handheld electronics, automotive systems, and portable devices. With its high performance current limit element, it ensures that the output voltage stays in the linear region of operation even when the input voltage is subject to sudden surges. The internal error amplifier further ensures that the difference between the reference voltage and the output voltage remains minimal.