LP2989IMX-3.3

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LP2989IMX-3.3 Application Field and Working Principle

The LP2989IMX-3.3 is a type of low dropout linear voltage regulator. It is designed for low voltage and low power applications, such as hand-held mobile device, digital cameras, wireless devices and so on. This voltage regulator can provide a regulated output voltage from an input voltage that is up to 35 volts higher than the regulated output voltage.

Features

• Input Voltage Range: 2.7 V to 5.5 V
• Output Voltage Range: 2.5 V to 5.0 V
• 200mA Max Output Current
• 2.2μA Typical Quiescent Current
• Low Dropout Voltage
• Small Package
• Reverse Current Protection
• Current Limiting/Short Circuit Protection

Application Field

The LP2989IMX-3.3 is ideal for low voltage and low power applications. It can be used for powering digital cameras, portable devices, and any other electronics that require low voltage operation. It is especially suitable for those applications where high efficiency, low output ripple, and fast transient response are desired.

Working Principle

The LP2989IMX-3.3 is a three-terminal low dropout linear voltage regulator. It uses a voltage dropper circuit to regulate an input voltage to a desired output voltage. It is composed of a power transistor connected in series with a resistor. The series-connected power transistor and resistor form a voltage divider circuit, which is used to control the voltage across the base-emitter junction of the power transistor. This controls the voltage at the collector of the transistor, producing a regulated output voltage.

The LP2989IMX-3.3 includes additional features such as current limiting, short circuit protection, and reverse current protection. The current limiting protects the input power source from excessive current draw and the short circuit protection protects the device from short circuits. The reverse current protection prevents current from flowing from the output to the input when the output voltage is lower than the input voltage.

Conclusion

The LP2989IMX-3.3 is a three-terminal low dropout linear voltage regulator which is ideal for low voltage and low power applications. It has a wide input voltage range of 2.7 V to 5.5 V, a regulated output voltage range of 2.5 V to 5.0 V, and a maximum output current of 200 mA. It also features current limiting, short circuit protection, and reverse current protection. These features make it an ideal choice for powering low voltage electronics.

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