LM2586T-5.0

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LM2586T-5.0 Application Field and Working Principle

The LM2586T-5.0 is a high voltage, high frequency, synchronous step-down regulator that can be used for very low output voltage applications. The device operates from a wide input voltage range of 4.5V to 55V, and it has an adjustable output voltage from 1.18V to 40V. The device also has a wide operating temperature range from –40°C to +85°C.

The LM2586T-5.0 is designed to provide a stable and efficient power supply solution that is suitable for use in many different fields. The device is designed for use in a wide array of applications, including distributed power systems, DC/DC converters, AC/DC converters, embedded systems and microprocessors. The device offers a wide variety of features to make it a suitable choice for many different applications.

Working Principle of the LM2586T-5.0

The LM2586T-5.0 is based on a synchronous switching regulator architecture that produces a low-ripple, regulated output voltage from an unregulated input voltage. The device works by converting the input voltage to a lower regulated output voltage through a series of steps. The first step is to match the input voltage to the output voltage, if necessary. This is done by using a voltage divider network that establishes a voltage bias to the output voltage.

The next step is to use an oscillator to convert the input voltage to a high frequency pulse-width modulated (PWM) signal. The PWM signal is then passed to an internal error amplifier. The error amplifier compares the high frequency PWM signal with the output voltage, and it adjusts the duty cycle of the PWM signal in order to maintain a constant output voltage. Finally, the PWM signal is passed onto an output stage, which comprises of a high voltage transistor switch and an output filter network. The transistor switch is switched on and off at a high frequency, and the filter network smoothes out the high frequency ripples in the signal to produce a steady DC output voltage.

The LM2586T-5.0 offers several features to ensure efficient operation, including protection against output overvoltage, output under voltage, over temperature, and transient pulse-width modulation hysteresis. The device also features soft start, which makes the device safer to use, while also providing a better enable/disable control over the switching frequency. Other features include thermal shutdown, frequency foldback and several other features to ensure efficient and reliable operation.

Conclusion

The LM2586T-5.0 is an efficient, high frequency, synchronous step-down regulator that is designed for use in a wide range of applications. The device is capable of providing a regulated output voltage from an unregulated input voltage, as well as providing protection against overvoltage, undervoltage, over temperature and other transients. The device also offers several features to ensure efficient and reliable operation, such as soft start, thermal shutdown and frequency foldback. The device is suitable for use in many different fields, including distributed power systems, DC/DC converters, AC/DC converters, embedded systems and microprocessors.

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