LM2574HVMX-15/NOPB Integrated Circuits (ICs)

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The LM2574HVMX-15/NOPB device is a monolithic integrated circuit which is mainly used as a step-down switching regulator and is an integral part of the PMIC (Power Management Interface Circuitry) family from Texas Instruments. It comes in an industry-standard 15 pin plastic DIP package and is mainly utilized for providing a regulated 5.0V +/-4.0% output from 2.7V to 5.5V input voltage.

This device is highly efficient in its job and requires very little external components to get started. It utilizes PWM (pulse width modulation) type of switcher and draws just 500uA when quiescent and 200uA in shutdown mode. It features an 8-bit current limit port as well as an internal over-temperature shutdown circuit. The high-speed switching frequency of 1MHz helps to sync the device with the rest of the system, enabling it to produce low-noise outputs with minimal filtering components.

One of the main features of the LM2574HVMX-15/NOPB is the high operating frequency which comes with an efficiency rating of up to 95% when operated at 5A. Since it employs an advanced switch design, the device can handle higher loads with a minimum of heat dissipation. The current limit protection provided by the device enables it to protect itself from short-circuits and can maintain a constant output voltage with less than a ± 2% variation even if the load changes suddenly.

The wide input supply range and integrated over-temperature protection make the LM2574HVMX-15/NOPB suitable for a variety of applications. It is mainly used in portable electronic devices such as smart phones, personal digital assistants, MP3 players and digital cameras. It is also suitable for powering bus systems and with its high power efficiency and current limit protection, it is the ideal choice for powering industrial machines and robotics applications.

The working principle of the LM2574HVMX-15/NOPB is based on an optimally designed switch architecture which utilizes PWM and pulse-by-pulse current limit techniques to control the output voltage. When an input voltage is supplied, an internal control circuitry modulates the duty cycle of the switches to regulate the output voltage. This device also has a selectable fixed-frequency internal oscillator which allows the user to modify the output voltage by adjusting the ON/OFF switching pattern of the MOSFET switches.

The LM2574HVMX-15/NOPB is designed to provide an ultra-low dropout voltage, providing a low and reliably regulated output voltage over a wide input-voltage range and at a very low output current. With its fast response time and high efficiency, it is the ideal choice for powering the latest generation of portable electronic and industrial equipment.

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