MC34701EK

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The MC34701EK is a voltage regulator special purpose integrated circuit (IC) designed and manufactured by ON Semiconductor. It is a low-dropout linear regulator (LDO) specifically designed to provide regulated output voltage to applications with higher power requirements. It features high accuracy, low noise, low power consumption and low dropout voltage. Additionally, the MC34701EK offers several features such as input and output over-voltage protection, over-temperature protection and thermal shutdown.

The MC34701EK is ideal for use in applications such as automotive, industrial and consumer electronics, as well as many other low voltage power supply applications. In these applications, the MC34701EK can be used to provide a regulated output voltage and accurate load regulation, as well as superior protection against output over-voltage, output over-current, output over-power and over-temperature events. The device is able to provide an output voltage range from 2V to 36V and it has a wide input voltage range from 5V to 40V.

The MC34701EKcan be configured in various settings, including a fixed or adjustable voltage, while being able to maintain an accurate output voltage. The device has a minimum dropout voltage of 20mV, providing superior regulation performance at high output currents. It also features adjustable soft-start and has current limit protection.

The MC34701EK operates using an external NPN pass device, such as the NPN transistors BC817 or BC807. This external NPN pass device enables the device to auto-adjust the current between the input voltage and the output voltage as required, allowing for proper load sharing across the output stages, thus minimizing power dissipation. The NPN pass device also prevents too much current from flowing, making it ideal for applications with a high input voltage, such as battery-powered devices.

In addition to its other features, the MC34701EK also has several of the standard features found on most linear regulators, such as automatic thermal and over-voltage shutoff, thermal shutdown, under-voltage lockout, output voltage adjustment (fixed or adjustable) and a temperature compensation element.

The MC34701EK also features a built-in current foldback which helps prevent output over-current and over-voltage and helps maintain device stability during an overload condition. This current foldback maintains a constant output impedance by reducing the output current as overload conditions increase. Additionally, the device has an integrated feedback loop and pull-up resistor, which helps maintain an accurate and stable output voltage despite input variations.

Overall, the MC34701EK is an excellent device for a range of low voltage power supply applications, due to its low noise, wide input range, wide output range and accurate load regulation. The device boasts low dropout voltage, high accuracy and low power consumption, making it ideal for applications that require power efficiency.

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