LM2575MX-3.3/NOPB

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Introduction to LM2575MX-3.3/NOPB

The LM2575MX-3.3/NOPB is a monolithic integrated circuit specifically designed as a cost-effective solution to convert unregulated input voltage into a fixed 3.3V output. It is a part of Texas Instrument’s (TI) voltage regulators and DC/DC switching regulators series. It is designed to achieve a maximum efficiency of around 83%, and has low output noise and minimal EMI. This device is capable of driving up to 2A of continuous output current.

Application Field of the LM2575MX-3.3/NOPB

Being an integrated parts solutions for an adjustable DC/DC conversion, it is suitable for design of many different applications and system solutions. As such, the LM2575MX-3.3/NOPB is mainly adopted in low-noise power supplies, battery chargers, and power factor correction (PFC) applications. Additionally, this device can also be used in the power-supply systems and systems employing 2.5V and lower voltage regulators in the post-regulator stage.

Working Principle of the LM2575MX-3.3/NOPB

The device is comprised of several components internally, and works based on the following principle: A voltage is introduced to the circuit through an external transformer, or another power source. The voltage is then applied to two sets of internal switches. The voltage is cycled on and off, in a regular pattern. When the internal switches allow the current to flow, the voltage appears, and when the switches block the current, the voltage will go away. This technique is referred to as pulse-width modulation (PWM).

The output voltage of the LM2575MX-3.3/NOPB is controlled by a standard, two-pole feedback loop circuit. This feedback loop incorporates a pair of diodes, as well as an internal voltage reference, which is connected to a sense pin. The sense pin monitors the output voltage, while the diodes compare it to the internal voltage reference, so that the device can adjust the output voltage accordingly. As such, the LM2575MX-3.3/NOPB is able to maintain a stable 3.3V output.

Conclusion

In conclusion, LM2575MX-3.3/NOPB is a monolithic integrated circuit specifically designed as a cost-effective solution to convert unregulated input voltage into a fixed 3.3V output. It provides a variety of advantages, such as the ability to drive up to 2A of continuous output current and an efficiency of up to 83%. It is suitable for design of many different applications and system solutions, such as low-noise power supplies, battery chargers, and power factor correction. The device is based on the two-pole feedback loop using two diodes and an internal voltage reference, which allows it to maintain a stable 3.3V output.

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