LM2575T-012

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The LM2575T-012 is a popular switching voltage regulator used for a variety of purposes in automotive and consumer electronics. This regulator can provide a regulated output from an unregulated input as low as 4V without the need for a heatsink. It also features a wide operating temperature range of -40 to 125°C and a variety of adjustable protection and control features, making it a versatile and reliable device for most applications.

LM2575T-012 is part of the switching voltage series of National Semiconductor regulators. It is specially designed for applications like cellular phones, personal computers, battery charger, and other portable applications that require low output voltages and high efficiency. It works by providing an integrated comparator and error amplifier, allowing it to function as an on-off type regulator.

The LM2575T-012 regulator typically operates by stepping up an input voltage to a higher regulated output voltage. It functions by alternately turning itself on and off at a switching frequency of 2MHz while it continuously monitors the output voltage and input current. If the output voltage or input current exceeds the selector value, the regulator will automatically switch itself off.

The regulator is extremely efficient, featuring high current drive capability, low standby current, and fast slew rate. It has a maximum output current of up to 1A with a maximum output voltage of 12V. It is also able to withstand overvoltage, overcurrent and over temperature protections, all of which can be adjusted via external resistors.

In addition to providing protection from over voltage and current, it also features some more advanced features like pulse-by-pulse current limiting and pre-bias startup circuitry. This enables the regulator to start up even if the output is at a level lower than what is necessary for the device’s normal voltage range.

The LM2575T-012 regulator is a simple and effective solution for applications requiring a regulated output from an unregulated input. It is extremely efficient and reliable, and its wide variety of adjustable features make it suitable for a variety of applications.

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