MC79L05ACPX

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MC79L05ACPX is a voltage regulator. It is a linear voltage regulator. This device is able to produce a regulated output voltage under varying input voltages, current and load conditions. This device is capable of delivering up to 1A of output current and is rated for an input voltage of 7V to 40V.

The MC79L05ACPX typically use an external pass transistor to regulate the output voltage. This particular voltage regulator is capable of regulating both voltage and current, as it is able to sense and regulate any changes in output current or voltage. Furthermore, MC79L05ACPX is temperature compensated and can operate at temperatures up to +85 ⁰C.

The MC79L05ACPX application field dwells mainly in consumer electronics, automotive, instrumentation, industrial and audio-video equipment, among others. It is usually employed due to its high stability and accuracy, being a reliable device for usage in a wide array of applications. An important feature of this device is that it is able to maintain its output characteristics even for high input-voltage transient conditions.

The MC79L05ACPX is also particularly advantageous because of its low power consumption and –since it has no need of an external heat sink- its small dimensions. Other features include high PSRR, reverse battery protection and a synchronous rectifier to further reduce power losses at the output stage.

The MC79L05ACPX circuit consists of an internal, variable-voltage reference, an error-amplifier, an active-Zener clamp, a current-sensing comparator, a peak-current-sensing comparator and a control logic circuit. An external N-channel MOSFET acts as an active current limiter. The peak-current-sensing comparator ensures the maximum output current is not exceeded and the current is limited according to the static current limit of the circuit.

The MC79L05ACPX works as follows: when the device is enabled, power is supplied to the input, entering through one of the voltage and current terminals. The voltage reference is set, meaning a target voltage is determined. The error amplifier determines the difference between the target voltage and the input voltage and produces an output signal proportional to this difference. This signal is used to adjust the voltage at the other input of the control logic circuit. This voltage determines the switch to be on or off, thus controlling the current flow through the external MOSFET.

In short, the MC79L05ACPX is a linear voltage regulator capable of providing a stable regulated output voltage under varying input voltages, current and load conditions. Due to its high stability and accuracy, the MC79L05ACPX is a preferred device in a lot of applications from consumer electronics to automotive and instrumentation. Its low power consumption, small size, reverse battery protection and high PSRR represent a few of its advantages.

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