LP2992AILDX-3.3

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The LP2992AILDX-3.3 is a low-dropout linear voltage regulator (LDO) designed for use in precision battery management, automated meter reading (AMR) and other low power applications. It is designed with very low quiescent current and very low dropout voltage, making it ideal for use in applications with limited power sources.

Features

• Supports up to 3.3V output voltage
• Only 400mV dropout voltage at 250mA current
• Low quiescent current: only 3.2mA
• Low Standby Power Mode: only 20µA
• On-Chip Thermal Shutdown circuitry
• Overvoltage/undervoltage Detection and Parity circuit options
• Green product (RoHS compliant)

Application Field

The LP2992AILDX-3.3 is ideal for battery management, AMR, and other low power applications where precision performance and low quiescent current are required. This device is well-suited for battery-powered systems where a low quiescent current and very low dropout voltage are critical. The device supports a wide range of input and output voltages, enabling its use for many different applications.

The device can be used in medical systems, IoT devices, wearables, and other such applications to provide a regulated output voltage with very low quiescent current and a low dropout voltage. It can also work efficiently in automotive, industrial, and communications applications.

Working Principle

The LP2992AILDX-3.3 uses a low-dropout (LDO) voltage regulator configuration. An LDO regulator works by setting a reference voltage, and the output voltage of the device is monitored and maintained at a level above the reference voltage by a circuit called a “error amplifier”. This error amplifier amplifies the difference between the output voltage and the reference voltage, and the amplified signal is then fed to the control circuit, which in turn adjusts the power transistor accordingly.

The power transistor is used to regulate the current flow between the input and output of the regulator. When the output voltage deviates from the reference voltage, the error amplifier adjusts the power transistor to either allow more or less current to flow through it. This effectively adjusts the output voltage to bring it closer to the reference voltage, thus maintaining the output voltage of the regulator at the desired level.

The LP2992AILDX-3.3 has built-in features such as Overvoltage/Undervoltage Detection, Parity circuit and Thermal Shutdown to protect the device and maximize performance. The On-Chip Thermal Shutdown circuitry protects the device against thermal overload conditions by automatically shutting down the device when the temperature exceeds the maximum rating.

Conclusion

The LP2992AILDX-3.3 from TI is a low-dropout linear voltage regulator which is specifically designed to work in precision battery management, automated meter reading and other low power applications. It offers very low dropout voltage of 400mV at 250mA current, as well as low quiescent current, making it ideal for use in applications with limited power sources. It also comes with additional features such as On-Chip Thermal Shutdown circuitry and Overvoltage/undervoltage Detection and Parity circuit, further enhancing its protection capabilities.

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