CS5203A-2GT3

CS5203A-2GT3 Application Field and Working Principle

The CS5203A-2GT3 is an integrated PMIC (Power Management Integrated Circuit) voltage regulator belonging to the linear voltage regulator family. It is a high current, low dropout controller for embedded applications, suitable for applications such as LCD-TVs, power-over-Ethernet, modems, and network hubs. This article explores the device’s application and working principle.

Application Field

The CS5203A-2GT3 is a linear voltage regulator designed for power-on reset, voltage tracking, and standby-mode power supplies. This device is typically used in RF and DC/DC applications that require high performance. It can provide more accurate, stable and low-noise outputs. It is also a drop-in replacement for many voltage regulators, making it an ideal solution for different power requirements.

The device is offered in two versions: the CS5203A-2GT3 and the CS5203A-2GT3N. The CS5203A-2GT3 is designed for applications with a maximum voltage output up to 7.5V, while the CS5203A-2GT3N is intended for applications that need higher voltage output, up to 15V.

Working Principle

The CS5203A-2GT3 uses a standard linear regulator configuration, which prevents over-voltage and over-current conditions. The linear voltage regulator is a device that maintains a constant DC output voltage under varying input conditions. The regulator implements this by using a combination of transistors and resistors to control the current flowing between the input and output.

The CS5203A-2GT3 is designed to regulate input voltages up to 45V and output voltages up to 7.5V. The voltage regulator features a low on resistance power output transistor (Q1), allowing for current up to 5A. The device also features a low-dropout behavior, allowing it to maintain a constant output voltage even when the input voltage fluctuates. This is essential in applications where the input voltage varies over time, such as in power-over-Ethernet applications.

The device is also equipped with a wide range of protection features, including short circuit, over-current, and overtemperature protection. In addition, the device includes a power-on reset signal that will detect when the supply voltage rises and will re-set the device, making it an ideal feature for systems that require a re-set signal. These features make the CS5203A-2GT3 an ideal candidate for use in embedded applications.