LM22672MRX-5.0/NOPB Integrated Circuits (ICs)

PMIC - Voltage Regulators - DC DC Switching Regulators

The LM22672MRX-5.0/NOPB is a current-mode DC-DC switching regulator with an adjustable output voltage in a compact thermally enhanced 5 x 6 mm PowerPAD™ package. It offers excellent line and load regulation in an inexpensive, low profile surface mount package. It features an accurate, fast line transient response and the ability to respond to dynamic load step demands from 0.5A to 5.0A with very low output voltage ripple. The LM22672MRX-5.0/NOPB is ideal for any application providing efficient, low-noise power conversion.

Overview

The LM22672MRX-5.0/NOPB is a current-mode DC-DC switching regulator that has an adjustable output voltage and can be easily adjusted using the internal feedback resistors. It uses voltage mode control, which allows the output voltage to remain constant even in the presence of a dynamic load. The device features fast line and load transient response and a low output voltage ripple, making it suitable for applications requiring low-noise, high efficiency power conversion. It also features a foldback current limit protection function to prevent the device from being overloaded. The LM22672MRX-5.0/NOPB is offered in a compact thermally enhanced 5 x 6 mm PowerPAD package.

Features and Benefits

• Accurate, fast line transient response
• Low output voltage ripple
• Efficient, low-noise power conversion
• Foldback current limit protection
• Compact thermally enhanced 5 x 6 mm PowerPAD™ package

Applications

• Notebook computers
• Portable devices
• Notebook PC power supplies
• Set-top boxes
• Game consoles
• High-efficiency DC-DC power supplies

Working Principle

The LM22672MRX-5.0/NOPB uses a voltage mode control circuit to regulate its output voltage. The error amplifier compares the feedback voltage to the REF voltage to create an error voltage output. The error voltage controls the duty cycle of the output stage switch (MOSFET), which then controls the output voltage. When the output voltage rises, the error voltage increases and the output switch turns off for a longer duration, reducing the output voltage. Conversely, when the output voltage decreases, the error voltage decreases and the output switch turns on for a shorter duration, resulting in an increase in the output voltage.

Conclusion

The LM22672MRX-5.0/NOPB is a high performance, low-noise DC-DC switching regulator that offers excellent line and load regulation. It is ideally suited for applications requiring efficient, low-noise power conversion, such as notebook computers and portable devices. It features a fast line transient response and the ability to respond to dynamic load step demands from 0.5A to 5.0A with very low output voltage ripple. This makes it an ideal solution for high-efficiency power conversion applications.