AN79L20M

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AN79L20M is a linear voltage regulator integrated with PMIC (Power Management Integrated Circuit). It belongs to voltage regulators – linear category. This device provides excellent load and line regulation, low drop-out voltage, low noise, and low temperature coefficient. It allows output voltage of 1.5V and 2V, but the most common voltage is fixed at 2V.

This linear regulator is usually used in various applications such as digital signal processing (DSP), CPU & microcontroller, portable devices, and automotive applications due to its low noise, fast transient response, and low quiescent current. It also has good electrical characteristics, such as low quiescent current, low drop-out voltage, and low noise voltage.

The AN79L20M works as a three-terminal regulator in order to provide a fixed output voltage. This voltage regulator consisting of a PNP pass element and a precision voltage reference helps to achieve constant output voltage from its input voltage with a minimum drop-down. The device provides output voltage regulation by regulating the current flowing into the load through a series of reference voltages from the 5V, 12V and 24V input voltage sources.

The working principle is composed of two stages. The first stage is the voltage reference, and the second one is the error amplifier. The voltage reference serves to provide a stable voltage output, while the error amplifier is responsible for controlling the output voltage. The output voltage is determined by comparing the input voltage and a reference voltage. The error amplifier will then control the flow of current through the pass element, which is the major component that regulates the voltage output.

The AN79L20M has an input voltage range of 3V to 20V, while its output voltage range is 1.5V and 2.0V. Its input capacitance value is 0.3µF and its quiescent current is 3.2mA. Its maximum drop-down voltage is 0.4V and its minimum drop-down voltage is 0.2V. Its turn-on delay time is 250µs and its rise time is 100µs. Its thermal shut-down temperature is 150°C and its short-circuit regulation is 0.8V just before shut-down.

The AN79L20M can work in the temperature range of -40°C to 125°C and its operation and storage purposes can be done between 0°C and 70°C. The device size is 5mm x 5mm, which is often appropriate for portable and automotive applications. The device also has good stability over time, as well as good thermal tracking characteristics.

The AN79L20M is ideal for portable applications and automotive electronics because of its low quiescent current and its fast response time. It can easily be used in digital signal processing applications due to its low noise, and in CPU and microcontroller applications since it is capable of controlling the output voltage with precision. The device is also economical and efficient.

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