LP5912Q0.9DRVRQ1

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The LP5912Q0.9DRVRQ1 is a low-voltage, cost-effective regulator designed by National Semiconductor, part of Texas Instruments\' Analog semiconductor portfolio. It is a high efficiency, adjustable output regulator for use in portable equipment where low quiescent current and high efficiency are required across a wide range of input/output voltages. This small, robust regulator supports applications from 0.9V to 5.5V. It is especially suited for applications with low-side switches requiring high-accuracy, low-noise, and low device temperatures.

The LP5912Q0.9DRVRQ1 belongs to the PMIC – Voltage Regulators – Linear category. When the linear regulator is properly designed, the output can be adjusted from 0.9V up to a maximum of 5.5V. Therefore it is suitable for applications including power management in mobile phones, tablets, notebooks, or battery-powered applications. The regulator also offers a wide range of features like a programmable soft-start, a wide operational temperature range of -40°C to 150°C and a programmable current limitation. Additionally, this device contains integrated fault conditions monitoring, including Over-Voltage, Under-Voltage and Short-Circuit protection.

The LP5912Q0.9DRVRQ1 can adjust the output voltage level over its entire range with a small external resistor divider, making it ideal for applications needing an adjustable output voltage. The regulator can also be enabled and disabled via its integration of an Enable pin allowing the circuit to be powered up or down as necessary with a low current. The 40µA shutdown current also makes it ideal for low current applications where the device must not draw much current when in the shutdown mode. With the maximum quiescent current of 90µA and a production variation from device to device of only 6µA, this little regulator is very suitable for application requiring a low quiescent current.

The LP5912Q0.9DRVRQ1 works as a linear regulator by using a voltage feedback circuit internally. This voltage feedback circuit takes the output voltage and compares it with the reference voltage, which is generally of higher order than the output voltage. Then based on the comparison, it controls the gate of the pass element. If the output voltage is too high, the control gate conducts less power, thus reducing the current flow and causing the output voltage to come down. Similarly, if the output voltage is low, the control gate conducts more power, increases the current flow, and brings the output voltage back up. This process is continued in a loop until the feedback voltage is equal to the reference voltage, if not then the output voltage will tend to go either low or high depending on the difference between the two.

The LP5912Q0.9DRVRQ1 is an extremely compact linear voltage regulator that is designed to support mobile equipment and applications. The device\'s power good-signal pin can be used in order to monitor the status of the output voltage. The device offers a wide range of features such as adjustable output voltage, low quiescent current, and high-efficiency, making it ideal for a variety of applications. In addition, the programmable limits of current, voltage and temperature enable safe operation of the device with low risk of damage during any conditions. The LP5912Q0.9DRVRQ1 is a feature rich device that allows for easy implementation in portable equipment with a large range of input/output voltages.

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