TLE4470GSXUMA1

PMIC - Voltage Regulators - Linear

The TLE4470GSXUMA1 is a low-drop voltage regulator integrated circuit that offers both an adjustable linear voltage regulator and a fixed output linear voltage regulator. The device is designed to meet the stringent requirements of automotive electronics, making it suitable for applications that require reliable, robust, and accurate voltage regulation in a variety of environmental conditions, including extreme temperatures and vibration levels. This datasheet summarizes the electrical characteristics, power dissipation, and thermal considerations of the TLE4470GSXUMA1.

Application Fields

The adjustable linear regulator of the TLE4470GSXUMA1 is particularly suitable for automotive applications and is ideal for power supplies with a wide input voltage range and a tightly regulated output voltage. The device can be used to regulate input voltage levels to a safe level and to protect circuits from over-voltage or under-voltage conditions. Additionally, the device is designed to meet demanding automotive requirements such as temperature performance, accuracy, and thermal stability.

The TLE4470GSXUMA1 is also widely used for other applications such as controlling output power in industrial and telecom systems, portable instrumentation, battery powered equipment, and general-purpose systems. It can be used for controlling voltage level for critical system parameters such as CPU core voltage, memory voltage, input/output supply levels, and various peripheral voltages.

Working Principle

The TLE4470GSXUMA1 consists of an adjustable linear voltage regulator (VL) and an output power transistor. The device is constructed in two sections and consists of an open-loop control amplifier and a series pass element. The open-loop control amplifier (A1) has a high input impedance and is quite stable and reliable. The amplifier senses the output voltage at the output voltage sensing pin and compares it with a reference voltage. The error voltage generated by the amplifier is further amplified and applied to the series pass element, which is the main controlling device of the linear regulator. The series pass element consists of a power output transistor, which provides the output current to the load. If the output voltage of the linear regulator decreases, the control amplifier detects the difference and lowers the base voltage of the transistor. This results in a decrease in the collector-emitter voltage of the transistor, thus maintaining the output voltage of the regulator constant.

The TLE4470GSXUMA1 also includes internal current limiting that prevents an over-current situation from occurring when loading a circuit. The device also has a reverse current protection function which prevents damage caused by reverse source voltage. By taking advantage of these protection functions, the TLE4470GSXUMA1 helps protect the system from damage caused by overloads, over-temperatures, and over-voltages.