LDK130PU30R

LDK130PU30R Application Field and Working Principle

The LDK130PU30R is a linear voltage regulator series from STMicroelectronics, designed for power management and industrial applications. It combines high current and flexibility with a range of features suited to this type of application. It is optimized for a wide working temperature range, with rated temperatures of -30°C up to +90°C, and is capable of delivering up to 4A of output current and providing up to 0.3V of output voltage. It features a range of features, such as enhanced input voltage range, Thermal shutdown, short-circuit and current limiting protection, as well as low dropout and low quiescent current.

The LDK130PU30R is a high-performance linear voltage regulator with a wide input voltage range of 8V to 35V. It provides an adjustable output voltage from 0.8V to 25V with a maximum output current of 4A, depending on the input voltage. The device also features an over current protection, a thermal shutdown and a low dropout voltage of 0.25V (typically). The device is available in two packages: SO8 and TO220.

Operation

The ST LDK130PU30R follows a standard linear voltage regulator circuit, which works by controlling the output voltage using a feedback loop. The feedback loop is controlled by the device’s internal error amplifier, which compares the actual output voltage to a stable reference voltage, and then adjusts its output to maintain the precise voltage requested. An output voltage of a linear regulator is equal to the difference between the input voltage and the voltage drop of the regulator’s built-in output transistors. To provide maximum current while still keeping this voltage drop within the specified range, the voltage regulator is typically configured with a low on-resistance output transistor, or a low output impedance, which allows higher current to flow with less decrease in output voltage.

Applications

The LDK130PU30R is highly suitable for applications requiring high current with tight voltage regulation and low noise operation. It is suitable for industrial applications, such as in motor control, switching power supplies, industrial control and process control, as well as in distributed power supplies. The device is well suited to serve as an input voltage regulator, allowing a wide input voltage range while ensuring stable operation over a temperature range of -30 to +90°C. It can be used in distributed power systems, providing high performance with flexibility and reliability.

Conclusion

The ST LDK130PU30R is a high-performance linear voltage regulator designed for power management and industrial applications. It provides a wide input voltage range and adjustable output voltage from 0.8 to 25V with maximum output current of 4A, and is capable of delivering up to 0.25V of output voltage with a low quiescent current. It is well suited for applications requiring high current with tight voltage regulation and low noise operation, including motor control, switching power supplies, distributed power systems and industrial control.