LM2576S-3.3/NOPB Integrated Circuits (ICs)

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

LM2576S-3.3/NOPB is a monolithic integrated switching regulator from Texas Instruments. This device can deliver up to 3A of output current over an adjustable output voltage range from 1.23V to 37V. The LM2576S-3.3/NOPB is specifically designed to replace older linear regulators and switchers with higher efficiency, low power consumption, and low component count.

The LM2576S-3.3/NOPB is a highly integrated switching regulator that can step down input voltages up to 40V and is capable of delivering up to 3A of output current. The device includes a low noise switching frequency of 500 kHz, a low voltage dropout (LDO) device, an adjustable Reference voltage and an overload protection circuit. With a very small footprint, the LM2576S-3.3/NOPB provides a cost-effective solution for applications such as powering board mounted microprocessors, FPGAs, ASICs, and other power-sensitive applications where size, weight and efficiency are important.

The LM2576S-3.3/NOPB is specifically designed with a wide input voltage range and adjustable output voltage. The device features a maximum duty cycle of 94%, a maximum output current of 3A, and a low quiescent current of only 10μA, making it ideal and highly efficient for low-power and space-constrained applications. Additionally, the device includes power good and thermal shutdown capabilities, and can sequentially turn on multiple output tracks.

The LM2576S-3.3/NOPB also includes an internal back-up regulator that monitors the output voltage and supplies a standby voltage of 37V to the input voltage when the main regulator is disabled. This feature helps maintain a stable output voltage even when the main regulator is off, making the LM2576S-3.3/NOPB ideal for applications where the main supply is disabled periodically.

The LM2576S-3.3/NOPB works according to the same basic principles as many other switching regulators. It is designed to take a higher voltage DC input, step it down to the desired voltage and current, and provide a steady output. The device uses a high frequency oscillator to rapidly switch the output transistors in order to regulate the output voltage. An error amplifier compares the output voltage with an internal reference voltage, and adjusts the switching period in order to keep the output voltage constant.

In the LM2576S-3.3/NOPB, two external resistors form a voltage divider to adjust the output voltage according to user requirements. The device also includes a soft-start circuit that gradually brings the output voltage up from zero to its set value. In addition, the device includes a power good indicator pin that outputs high when the output voltage is within 5% of its set value.

In summary, the LM2576S-3.3/NOPB is a highly integrated switching regulator with adjustable output voltage and a wide input voltage range. It is specifically designed to provide a cost-effective solution for applications where size, weight, and efficiency are important. The device can deliver up to 3A of output current over an adjustable output voltage range from 1.23V to 37V and features a maximum duty cycle of 94%, a low quiescent current of 10μA, and a low-noise switching frequency of 500 kHz. It also includes power good and thermal shutdown capabilities, and can sequentially turn on multiple output tracks. The LM2576S-3.3/NOPB is the perfect choice for power-sensitive applications with difficult size and power constraints.

The specific data is subject to PDF, and the above content is for reference