SPX3819M5-L-1-5

Introduction

The SPX3819M5-L-1-5 is a programmable linear voltage regulator used to regulate a constant voltage to the output. It is categorized as a PMIC (Power Management Integrated Circuit) and is part of the voltage regulators family of products. Its main application fields are in industrial, automotive, communications, computer, and consumer electronics.

Features and Specifications

The SPX3819M5-L-1-5 contains six High-Current N-Channel linear regulator channels. It has a programmable output voltage range between 2V and 28V and at current up to 5A. The operational temperature range of the device ranges from -40°C to +85°C. It also has an integrated thermal protection which activates if a junction temperature of >200°C is detected.

Other features of the device include a programmable voltage output and low quiescent current which allows the device to be configured to either operate in a continuous mode or in the Power Save Mode. The Power Save Mode reduces the load current at no load and reduces total power dissipation. The device also has Over-Voltage, Over-Current, and Output Short Circuit protection, short circuit protection and thermal shutdown with hysterises.

Applications

The SPX3819M5-L-1-5 can be used to reduce total system power consumption, reduce output voltage ripple, maintain thermal stability, and provide over-temperature protection in applications such as industrial motor drives, automotive, communications, computer and consumer electronics. In addition, it can be used in many industrial and consumer applications that require high current, low dropout regulators.

Working Principle

The SPX3819M5-L-1-5 is a high current linear voltage regulator specifically designed for power supply applications. It works by using an external feedback resistor to control the output voltage. A voltage reference is provided internally and is compared to the voltage present on the feedback pin to create an error signal. This error signal is then amplified and used to drive the N-Channel MOSFET which is used to regulate the output voltage.

The control section of the device consists of a voltage reference, error amplifier and output transistor. The error amplifier senses the output voltage of the regulator and amplifies the difference between the output voltage and the reference voltage. The output transistor is then actuated to reduce the output voltage to the desired level.

The MOSFET output transistor provides load current to the load and dissipates the excess power as heat. In order to reduce the power dissipation, the device has an integrated Power Save Mode. This mode is enabled by connecting an enable pin to ground. When enabled, the output transistor is switched off and the output current is reduced to a predetermined minimum.

Conclusion

The SPX3819M5-L-1-5 is a programmable linear voltage regulator which is best suited for applications such as industrial motor drives, automotive, communications, computers and consumer electronics that require high current, low dropout regulators. It works using a combination of a voltage reference, error amplifier and output transistor to reduce the output voltage of the regulator down to the desired level. The device also provides features such as a programmable output voltage range, low quiescent current and integrated thermal protection.