IRU3073CQTR

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Linear voltage regulators and switching voltage regulators have evolved significantly over the past decades. Pioneers of the industry such as National Semiconductor have designed hundreds of linear and switching regulators, integrating them into different devices, systems and applications. The IRU3073CQTR voltage regulators come as one of the many exciting products of National Semiconductor and are aimed at applications requiring high accuracy and minimal power dissipation.

The IRU3073CQTR voltage regulator is housed in either a 8-pin, small outline (SOP) or a 8-pin, small outline integrated circuit (SOIC) package. The small package, coupled with excellent accuracy, minimal power dissipation and low ground current, makes this voltage regulator an ideal choice for applications such as microprocessors or digital signal processors (DSP). Additionally, it is also suited for peripheral circuits, power supply control, power amplifiers and display systems.

The IRU3073CQTR voltage regulator has a voltage dropout of 1.1V at 400mA, with a maximum output current of 500mA. The switch frequency can be adjusted from 50kHz to 800kHz by an external resistor divider. It also has an enable pin which can be used to put the regulator in shutdown mode. This mode lowers the shutdown current to less than 1µA.

The IRU3073CQTR utilizes a linear regulation technique to regulate the output voltage. It is an integrating type voltage regulator, which means that it relies on an internal voltage reference and current sensing resistors for regulating the output voltage. The output voltage is regulated by comparing the voltage reference to the feedback voltage. If the voltage on the output is below the reference voltage, the reference voltage is increased until it exceeds the feedback voltage. This results in the regulator turning on, thus increasing the output voltage.

The switching regulation technique is also employed by the IRU3073CQTR. The switch frequency is programmed with the help of an internal oscillator. The frequency of the oscillator is determined by an external resistor divider. This feature allows the voltage regulator to have a higher load regulation performance. Additionally, it also reduces the size of the components needed for the voltage regulator, thus making it more compact.

The IRU3073CQTR voltage regulator has several protection features. It contains an over-temperature protection circuit to ensure that it does not overheat and it has built-in undervoltage protection. Furthermore, it has an overcurrent limit function which prevents the regulator from being forced into an over-current state.

In conclusion, the IRU3073CQTR voltage regulator from National Semiconductor is an excellent choice for applications that require high accuracy and minimal power dissipation. Its linear and switching regulation techniques are both high performance solutions that allow the device to have better load regulation performance while still reducing the size of the components needed. Furthermore, its protections functions ensure its safe operation. It is thus easy to see why it has become such a popular choice among engineers.

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