LP2975IMMX-3.3

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Pulse-width modulation (PWM) devices, such as the LP2975IMMX-3.3 voltage regulator controller, are utilized to regulate the output voltage of switch-mode power supply circuits, such as those found in portable electronic devices, computers, and telecommunications systems.

LP2975IMMX-3.3 Application Field

The LP2975IMMX-3.3 is a PWM system-on-chip (SoC) voltage regulator controller designed to provide adjustable output voltage levels. The device features integrated N-channel MOSFET drivers, allowing it to be used in small, space-constrained applications. The device also features an adjustable output voltage range of 0.75V to 6V, making it ideal for powering various types of electronic components such as DSPs, microprocessors, and FPGAs.

The LP2975IMMX-3.3 is suitable for a variety of applications, including power supplies for embedded systems, industrial automation equipment, as well as in automotive, electric vehicle, and 40 watt motor controller applications. The device is also capable of low power standby mode operation, providing a very low quiescent current draw of 2.25 µA.

LP2975IMMX-3.3 Working Principle

The LP2975IMMX-3.3 operates on the pulse-width modulation (PWM) principle, in which the output voltage is regulated by varying the width of the pulses delivered to the load. The device features an adjustable frequency range of 250 kHz to 1 MHz, which can be selected by connecting a resistor between a designated signal pin and ground. The device also features a number of protection features, such as under-voltage lockout (UVLO), over-voltage protection (OVP), and a pulse-width modulation (PWM) skip mode, which can be used to reduce power consumption.

In addition, the device features two enable/disable input/output pins, which can be used to control the enable/disable state of the device. The enable/disable feature can also be utilized to enable power saving mode operation in idle or standby conditions.

Conclusion

The LP2975IMMX-3.3 is a highly integrated PWM voltage regulator controller suitable for a wide variety of applications, including power supplies for embedded systems, industrial automation equipment, and automotive, electric vehicle, and 40 watt motor controllers. The device features an adjustable frequency range and integrated protection features, such as under-voltage lockout, over-voltage protection, and a pulse-width modulation skip mode, making it ideal for low power and space-constrained applications.

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