LM2678SX-3.3/NOPB

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The LM2678SX-3.3/NOPB is a switching regulator power supply from Texas Instruments. It is a DC-DC converter that can accept either a wide input voltage range or a single +3.3V input and provide an adjustable output from 0.8V to 4V. It is a simple and efficient low-cost power solution for portable applications such as cellular phones, PDAs, and other hand-held devices. It is ideal for use with low impedance loads, such as ceramic-based multilayer capacitors, and features complete protection against over-voltage, over-current, and thermal shutdown. The LM2678SX-3.3/NOPB has a wide range of applications, from low power devices such as disk drives and LCD displays to high power devices such as processors and FPGAs.

The LM2678SX-3.3/NOPB is an adjustable switching voltage regulator that can deliver up to 3A of output current. It has a 3-phase interleaving architecture that increases the switching frequency and reduces ripple in the output. The regulator offers programmable current limit and over-temperature protection for robust operation. It can be used to replace linear regulators with a power efficiency of up to 95%. The device features ultra-low dropout of only 500mV. It includes a 0.1µF ceramic capacitor for improved stability.

The LM2678SX-3.3/NOPB provides flexibility of adjustable output voltage, with a programming range from 0.8V to 4V. It also offers a wide range of switching frequency and a shutdown mode for reduced power consumption. The device features internal power MOSFETs and is internally compensated for ease of use. It also has an enable pin that can be used to turn the output on and off.

The LM2678SX-3.3/NOPB has a wide applications field. It is particularly useful in portable battery-powered devices, handheld electronic products, and digital equipment powered by 3.3V input voltage sources. The device can also be used in power supply systems requiring a dual output voltage with a tightly regulated output. Its low cost, compact size, and simple configuration make it an attractive choice for many design engineers and projects.

The LM2678SX-3.3/NOPB works according to the buck regulator principle, which is a switching mode power supply. In this approach, a voltage source is connected to an inductor and a switch. When the switch is closed, energy is stored in the inductor, and when the switch is open the stored energy is released, generating a voltage drop. This drop can be adjusted by modulating the length of time the switch is open, which is controlled by an internal oscillator or by an external signal.

The LM2678SX-3.3/NOPB not only provides an adjustable voltage output, but also delivers up to 3A of output current and offers a wide range of protection features. It is suitable for a variety of applications, including portable battery-powered devices, handheld electronic products, digital equipment with a 3.3V input, and power supply systems requiring a dual output voltage with tight regulation. It is an efficient solution for low-cost power supply design.

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