Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

PMIC - Voltage Regulators - Linear

LP2980AIM5-5.0 is a low drop-out linear regulator from Texas Instruments, designed to provide 5.0V of stable output voltage with a minimum dropout voltage of 0.6V at up to 500mA. This makes LP2980AIM5-5.0 an ideal choice for a wide range of portable and fixed applications, including portable audio and wireless applications, where tight regulation and low quiescent current consumption are required.

LP2980AIM5-5.0 offers excellent transient response with a peak-load transient trip time of less than 6µsec. It also features a low noise output of only 17µVRMS and a programmable soft-start feature, allowing higher inrush current limiting. Thermal foldback and over-temperature shutdown provide added protection.

Application

The LP2980AIM5-5.0 is an excellent choice for cost-sensitive and space-limited low power applications, such as portable audio players, remote control devices, MP3 players, cellular phones and other mobile applications. Features such as its low voltage dropout make the LP2980AIM5-5.0 an excellent choice for battery powered applications, where its high efficiency helps conserve battery life.

Besides portable applications, LP2980AIM5-5.0 can also be used in a wide range of fixed applications where its low quiescent current and low noise operation makes it suitable for high reliability systems. It is also suitable for applications such as LCD displays, game consoles and test equipment, where its low voltage dropout and tight regulation are useful.

Working Principle

LP2980AIM5-5.0 is designed to provide a regulated output voltage of 5.0V when the input voltage is between the minimum and maximum specified. The device comprises a P-channel power MOSFET, followed by a regulator comparator and a feedback network. The output voltage is regulated by the error amplifier comparrator and the output voltage is determined by a voltage divider at the VREF pin.

To begin its operation, the Error Amplifier must be enabled. This can be done either by setting the EN pin to be low active, or by using a PNP transistor to control the enable pin with a voltage source. Once the enable pin is activated, the error amplifier will begin to compare the voltage at the FB pin with the voltage at the VREF pin and adjust the output voltage accordingly. When the voltage at the FB pin goes above the voltage at the VREF pin, the error amplifier will reduce the output voltage by switching off the MOSFET and when the voltage at the FB pin is below the voltage at the VREF pin, the error amplifier will increase the output voltage by switching on the MOSFET.

The LP2980AIM5-5.0 is also designed for current limiting, thermal foldback, over-temperature shutdown and current foldback, ensuring that the output voltage is always within the specified range, even when short-circuit or overload conditions occur.

Conclusion

The LP2980AIM5-5.0 can offer several features that are beneficial for a wide range of applications, including portable audio and wireless devices, LCD displays, game consoles and test equipment. Its low voltage dropout, low noise operation and high efficiency make it an excellent choice for battery-powered applications. Additionally, its current limiting, thermal foldback, over-temperature shutdown and current foldback features provide added protection in critical applications, making LP2980AIM5-5.0 an ideal solution for applications requiring a stable 5.0V output.

The specific data is subject to PDF, and the above content is for reference