LM285Z-1.2

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The LM285Z-1.2 is a linear voltage reference module used in many applications. It is categorized under PMIC - Voltage Reference and is used to provide a precise voltage reference for voltage regulation and other applications. The module incorporates a precision band gap reference, low drop-out regulator and protection circuits in a single package.

The LM285Z-1.2 is ideal for a wide range of applications including voltage references for processors, analog-to-digital converters, digital-to-analog converters and many other low-noise and low-power circuits. It is also suitable as a power supply for many devices needing a stable voltage source, including RS-232 converter, telephone line switch and PECL. The module is designed to operate on a single 5V input voltage, consuming only 4mA of current.

The working principle of the LM285Z-1.2 is based on the band gap reference technique. This technique uses a temperature-compensated, wide-guaranteed low-voltage reference circuit to achieve excellent accuracy and low temperature coefficient. The reference voltage is derived from bipolar junction transistors and a precision resistive voltage divider. The resistive voltage division provides a 1.25V reference level with high accuracy over a wide range of temperatures and operating conditions.

The low drop-out regulator of the LM285Z-1.2 operates by means of an internal MOSFET current source and PNP current mirror. The MOSFET current source regulates the output voltage by reducing the voltage drop across the series resistor. The PNP current mirror provides a high gain error amplifier that compensates the output voltage when it is outside its specified range. The regulator will turn off if the input voltage drops below the regulation voltage, protecting the device and the output voltage.

To ensure maximum accuracy, the LM285Z-1.2 is designed with a built-in protection circuit which prevents over-temperature and current overload. The protection circuit is typically triggered when the temperature exceeds 125°C or if the output current exceeds the maximum rated value.

The LM285Z-1.2 is an ideal solution for many applications requiring a precise and stable voltage reference. It is designed to operate over a wide range of temperatures and operating conditions and incorporates an accurate and low-noise low-voltage reference circuit. The module is also designed with a low drop-out regulator and protection circuit for maximum accuracy and protection. The highly integrated module is easy to use, cost-effective and provides a reliable voltage reference for many applications.

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