LM2675M-5.0/NOPB

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The LM2675M-5.0/NOPB is a high performance monolithic synchronous switching regulator recommended for use in a wide array of applications. It is typically used as a step-down DC/DC converter with its internal 0.5 A switch capable of providing up to 3.5A of output current. This monolithic synchronous regulator has load regulation of 0.5%, low quiescent current of 20 µA, and low switching frequency of 1 MHz. It also features a low on-resistance switch and very efficient operation from 6V to 40V VIN. The LM2675M-5.0/NOPB includes multiple protection features for over-temperature, overload, under-voltage lock-out, and short-circuit protection. In addition, it offers a high-efficiency regulator that can achieve a power conversion efficiency of up to 95%.

This device is suitable for use in a broad range of applications including battery-powered systems, lead-acid battery charge control, digital power systems, point-of-load converters, and DC/DC converters. It is available in fixed 3.3V, 5V, and adjustable voltage versions. It is available in an 8-pin SOIC package with an operating temperature range of -40°C to 125°C.

The LM2675M-5.0/NOPB works on the principle that the energy transfer is done via switch that connects and disconnects a load from a source. This switching regulator is a non-synchronous converter and its efficiency is affected by the on-resistance of the switch, which is minimized in this circuit. The input voltage is applied to the input filter, which is typically a coupled inductor filter, and the switch is operated at a frequency determined by the circuit design. This type of regulator typically has automatic PWM (pulse width modulation) control, which ensures that the output voltage is regulated, even in the case of varying inputs or loads. The main advantages of this type of regulator are high efficiency, fast transient response, and small size.

The switching frequency of this regulator can be adjusted by varying capacitor values. The output voltage is effectively regulated by the error amplifier which senses the output voltage differential and turns off the switch when it is high, thus controlling the output voltage of the regulator. An external feedback resistor is used to control the output voltage. The LM2675M-5.0/NOPB also features second order soft-start and short-circuit protection, making it suitable for use in applications that require rugged and efficient DC/DC converters.

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