LP875484YFQR

LP875484YFQR DC/DC Switching Regulator

Application Field

The LP875484YFQR is an innovative DC/DC switcher (or switching regulator) from Lattice Power. It offers an integrated solution for a variety of applications, particularly for power conversion and control in telecom, automotive, consumer and industrial applications. Offering a wide 4.5V to 28V input voltage range, the LP875484YFQR is designed to meet the needs of mobile devices and be a reliable and efficient replacement to linear regulators, providing greater power efficiency and heat dissipation. Additionally, the device comes with current monitoring, programmable frequency and switching voltage, and a wide output voltage range (1.2V to 3.3V). It also has a low shutdown current and a 0.7V internal reference voltage, which ensures an accurate and controlled output voltage.

Working Principle

The working principle of the LP875484YFQR is based on a tight regulation of the output voltage, which is achieved with the proven pulse-width modulation (PWM) technology. The PWM control is enabled by an internal oscillator and provides accurate, regulated output voltage and high power conversion efficiency. The LP875484YFQR will adjust the width of the output pulses over time according to the programmed voltage, current and frequency parameters. The output voltage can also be programmed with a diode-capacitance network or an external resistor network.

Additionally, the LP875484YFQR supports four operating modes: the PWM Mode; Burst Mode for high efficiency at light loads; Skip-Cycle Mode for power saving at light loads; and PFM Mode for improved light-load efficiency. These modes can be easily selected by an external control pin. The LP875484YFQR also provides current monitoring, which allows system designers to monitor the DC/DC converter’s operational current to ensure reliability, while the soft start feature provides a reliable start-up without overshoot or undershoot, even at low input voltages.

Conclusion

The LP875484YFQR DC/DC switching regulator is an innovative, efficient and reliable solution for many power conversion and control applications. The device features a wide input voltage range, adjustable output voltage range, programmable frequency, current monitoring, as well as four operating modes. These features make the LP875484YFQR a perfect choice for high performance, reliable and cost-effective power management applications.