LTC1873EG#PBF

The LTC1873EG#PBF belongs to the category of PMIC-Voltage Regulators-DC DC Switching Controllers. It is used as a controller in DC-DC systems that require flexible and accurate output rating control. This allows for higher performance, lower cost, and reduced size in DC-DC system applications. With this product, engineers can customize the output voltage, current, and power requirements for many different types of applications.

Features

• Integrated Variable Frequency PWM Controller
• Integrated Bootstrap Circuit
• Frequency Synchronization
• Voltage Reference 0.8V ±0.2V
• Max Switching Frequency: 1MHz

Applications

• Servers
• Main Power Supplies
• Portable Electronic Devices
• Medical Equipment
• Telecommunication
• Industrial Automation
• Aerospace and Defense

Working Principle of LTC1873EG#PBF

The LTC1873EG#PFB is a voltage mode switching controller that uses pulse width modulation(PWM) to control the output voltage of the power supply. It has an integrated variable-frequency PWM (VPWM), an internal voltage reference, a current limit control, and an enable input. It has an integrated bootstrap circuit and frequency synchronization, which improve the overall efficiency of the DC-DC converter system. The VPWM provides a PWM signal directly to a power stage. During each cycle, the voltage-mode switching controller compares the output voltage and a reference voltage which is set by a trim resistor. Based on the comparison result, the controller adjusts the duty cycle of the PWM signal. The output voltage is thereby regulated to the desired voltage set point.

Conclusion

The LTC1873EG#PFB is a versatile and accurate voltage mode switching controller, ideal for use in various DC-DC converter applications. It integrates multiple features to improve overall efficiency and reduce system cost, size and complexity. With the improved WSMPP stress across the switching stage, it provides higher performance, noise immunity and longevity. Its flexible design options make it an ideal choice for applications in many different areas, such as servers, telecommunication systems, automotive and aerospace applications.