LP2980IBPX-3.3/NOPB

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The LP2980IBPX-3.3/NOPB is a Linear Voltage Regulator from the Power Management IC (PMIC) family. It is designed to provide an adjustable output voltage and is suitable for a variety of application fields. This article provides an overview of the LP2980IBPX-3.3/NOPB and its working principle.

Features & Benefits

The key features of LP2980IBPX-3.3/NOPB include:

• Input voltage range: 2.9 V to 11.25 V
• Output voltage range: 0.8 V to 15 V (adjustable)
• 2.2mA quiescent current, 11.5mA maximum current
• Thermal shutdown protection, current limiting protection, and reverse-battery protection
• Small package size: 5mm x 5mm

These features enable the device to be used in applications such as digital camera, DPMS power control, and cellular phone sub-systems. It can also be used in automotive, industrial, and consumer electronics.

Principle of Operation

The LP2980IBPX-3.3/NOPB is a low-dropout, linear voltage regulator that uses the classical error amp architecture. This architecture includes an output stage, a feedback loop, and an error amplifier.

The output stage consists of a pass transistor, which is connected to the input voltage source. When the input voltage increases, the current from the source increases, and the pass transistor decreases the output voltage of the regulator to compensate for the change. This ensures that the output voltage remains constant.

The feedback loop consists of a comparator and an external resistive divider network. The divider divides the output voltage of the regulator and feeds it back to the comparator. The comparator compares the divided voltage with an internal reference voltage and sends an error signal to the error amplifier.

The error amplifier uses the error signal to adjust the current to the output stage. This allows the output voltage of the regulator to be adjusted to match the desired output voltage. The error amplifier can also provide overcurrent protection if the output current exceeds the maximum current limit.

Applications

The LP2980IBPX-3.3/NOPB is suitable for a variety of application fields, including automotive, industrial, and consumer electronics. It can be used in digital camera, DPMS power control, and cellular phone sub-systems.

In digital camera applications, the device can be used to control the power supply for a digital camera’s lens mechanism and its CMOS sensor. It can also be used to supply power for voltage reference, auto flash controllers, video LCD drivers, and other digital camera components.

In DPMS power control, the LP2980IBPX-3.3/NOPB can be used to provide a stable power supply for DPMS (display power management signaling) controllers. This ensures that the display remains in a low-power state when the system is idle.

In cellular phone sub-systems, the device can be used to provide a stable power supply for components such as RF transmitters, receivers, SIM/UICC cards, PA, codec, and other sub-systems.

Conclusion

The LP2980IBPX-3.3/NOPB is a versatile Linear Voltage Regulator from the Power Management IC family. It is designed to provide an adjustable output voltage and can be used in a variety of application fields. It is capable of providing thermal shutdown protection, current limiting protection, and reverse-battery protection. It is suitable for use in applications such as digital camera, DPMS power control, and cellular phone sub-systems.

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