MAX883CSA+

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Linear regulators are one of the most common solutions used for implementing a steady DC voltage supply in electronic circuits. The MAX883CSA+ from Maxim Integrated was designed for those situations when a well-regulated supply voltage is needed, where economical parameters are a must. Its compact package makes it a good option for those designs that aim to keep board space to a minimum.

Features

The MAX883CSA+ is an adjustable low-dropout (LDO) linear regulator that offers very good line and load regulation as well as low output impedance which will improve the system stability. It includes a band gap voltage reference that enables accurate output voltage regulation thus keeping regulation tightly during temperature variations. It also includes a current-limit circuit, a thermal shutdown circuit, a reverse-battery protection circuit, optimized thermal characteristics, and logic-level enable input.

The package type of the MAX883CSA+ is TO-236-3, a three-pin small surface-mount package (2.04 mm × 2.22 mm) therefore fitting in space-limited systems. It costs about US $3.1 each in a discount of 1K.

The operating temperature safety range of the MAX883CSA+ is from -40°C to +125°C. Under these limits, it outputs a maximum continuous current of 100mA. Some of its features, such as overcurrent protection, are designed to shut down to protect the device. But the MAX883CSA+ enables the user to manually reset the device by shorting the Output to GND.

Application Fields

The MAX883CSA+ is an ideal solution for designs that require a small and robust logic-level low-dropout (LDO) regulator. An example of such an application is in automotive systems where the MAX883CSA+ could be used to regulate the voltage of 12- or 24-Volt battery supplies. Battery voltage level regulates to less than 5.5V at up to 100 mA load current. It could also be used in portable applications such as cellular phones, PDAs, or digital cameras where power consumption is a major issue.

The MAX883CSA+ could also be used in industrial, medical, and computing applications, such as in laboratory equipment, portable patient monitoring systems, or laptop computers where manually reset of the device is essential.

Working Principle

The MAX883CSA+ is an adjustable linear regulator that uses an internal NPN power transistor as the pass device. The operating output is set by an external voltage divider connected across the device. A bandgap voltage reference and current-limiting circuit comprise the other main functional blocks inside the device. The internal NPN transistor operates in a linearregion and acts as a variable resistor.

The MAX883CSA+ has four available pins, two for input power, one for ground and one for output. The output pin outputs the voltage regulated according to the voltage divider. The input pin can take voltage from either a DC power source such as 5V, 12V, 24V, etc.) or an AC supply, with a minimum of 4V to a maximum of 26V. The ground contact provides a return path for current to flow from the output pin to the input pin.

The MAX883CSA+ is a simple yet effective solution when it\'s necessary to output a steady voltage supply. It offers excellent line and load regulation and an accurate voltage reference which combined, ensure that the component performs well and yields consistent results without the need of additional components.

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