LM2576T-15/LF03

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

LM2576T-15/LF03 Application Field and Working Principle

The LM2576T-15/LF03 is a monolithic integrated circuit designed as an adjustable 3-terminal positive-voltage regulator. It is capable of providing 0.1V to 17V output in increments of 0.1V. The regulator incorporates current limiting and thermal shutdown protection, thus making it especially attractive in high-current and/or thermal environments. Its fixed output voltage is adjustable with the external resistors connected to the ADJ pins.

The LM2576T-15/LF03 is designed to be used in a variety of power management applications, including step-down converters, DC to DC converters, and battery chargers. It is capable of supplying a constant output voltage over a wide range of input voltages, and offers high efficiency, low headroom voltage, fast transient response, and low output ripple. It is a DC to DC switching regulator with a switching frequency of 1 MHz.

Working Principle

The LM2576T-15/LF03 works on the principle of pulse width modulation (PWM) and is suitable for use in the power unit of electronics devices and precision circuits. In this regulator, a signal is sent to a Multi-functional IC, which then controls the output voltage by adjusting the duty cycle of the PWM signal. PWM is a type of signal modulation in which the duration of a given pulse, also known as the pulse width, is proportional to the magnitude of the analog signal being modulated. The LM2576T-15/LF03 regulates the output voltage by adjusting the duty cycle of the PWM signal.

The Multi-functional IC comprises of a voltage regulator, a dynamic oscillator and a pulse-width modulator, all of which work in tandem to maintain a constant output voltage. The voltage regulator keeps the voltage level at a set point, while the dynamic oscillator creates a reference signal which is compared to the feedback signal from the external components to generate a pulse-width modulated signal. The pulse-width modulator adjusts the output voltage by adjusting the pulse width of this signal based on the magnitude of the feedback signal.

Applications

The LM2576T-15/LF03 is suitable for a variety of applications, including the following:

• Battery Chargers
• Local, on-board voltage regulation
• DC-DC Converters
• On/off line switching
• Smart metering, instrumentation and control systems

The LM2576T-15/LF03 can be used to power a variety of electronic devices, and its high efficiency, fast transient response and low output ripple make it an ideal choice for portable and sensitive equipment.

Conclusion

The LM2576T-15/LF03 is a monolithic integrated circuit designed as an adjustable 3-terminal positive-voltage regulator. It is capable of providing 0.1V to 17V output in increments of 0.1V, and features current limiting and thermal shutdown protection along with high efficiency, fast transient response, and low output ripple. It is suitable for a variety of applications, including battery charging, local voltage regulation, DC-DC converters and on/off line switching. The LM2576T-15/LF03 is an ideal choice for powering a variety of electronic devices, particularly portable and sensitive equipment.

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