LM2575HVM-5.0/NOPB

LM2575HVM-5.0/NOPB Application Field and Working Principle

LM2575HVM-5.0/NOPB is a high-performance adjustable step-down DC/DC switching regulator which provides input voltage range from 7V to 40V and output voltage range from 0.8V to 5V, making it suitable for wide range of applications including industrial systems, automotive and battery powered applications. The LM2575HVM-5.0/NOPB has multiple safety and protection features, built-in under-voltage lockout, adjustable frequency, short circuit protection and thermal shutdown.

This device belongs to a family of DC/DC switching regulators called powers integrated circuits (PSICs). These PSICs are mainly used in portable and embedded applications and are available in different very small package options, which makes it an ideal choice for applications with space constraints. The LM2575HVM-5.0/NOPB has a High-Efficiency 1A DC/DC Step-down Switching Regulator that offers a regulated output voltage of 0.8V to 5V adjustable at currents up to 1A.

Working Principle

The device consists of an on-chip P-channel MOSFET switch, a high-speed current-mode oscillator, a temperature compensation circuit, a control logic circuitry with error amplifier and a low side internal current sense differential amplifier. The P-channel MOSFET switch is capable of operating at up to 40V and is designed to switch at maximum frequency of 1MHz. The voltage-mode control technique and adjustable frequency are the main constituents of this device which helps in efficient power conversion. The device also incorporates a temperature compensation which helps maintain output voltage within its specific limits during variations in ambient temperature.

The LM2575HVM-5.0/NOPB uses the fixed frequency, current mode regulation technique, which provides fast transient response, even during light loads. The input voltage, switching frequency, output voltage and current limit can be adjusted using external components. The switching loss and external component requirements are minimal, making it suitable for space sensitive applications. The device provides additional protection features like under-voltage lockout and short circuit protection. The soft-start feature helps prevent current inrush, which makes it suitable for driving heavy loads.

Conclusion

The LM2575HVM-5.0/NOPB is an ideal choice for wide range of applications as it has wide input voltage range, high efficiency and excellent transient response. The adjustable frequency feature helps in minimising component size, making it suitable for space sensitive applications. This device is also equipped with protection features which provides additional safety for the circuit.

In conclusion, LM2575HVM-5.0/NOPB is a highly efficient DC/DC switching reparator which provides input voltage range from 7V to 40V and output voltage range from 0.8V to 5V, with current capability of up to 1A, adjustable frequency, under-voltage lockout, short circuit protection and thermal shutdown features. This device is suitable for wide range of applications due to its wide input voltage range, high efficiency and excellent transient response.