LM4121AIM5X-ADJ

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PMIC - Voltage Reference

Voltage references are a critical component of power management integrated circuits (PMICs) that provide consistent discharging and charging of the device\'s power source. They use a variety of techniques to control the output voltage from the reference cell, allowing users to maintain a specific voltage in their devices with minimal losses. The LM4121AIM5X-ADJ is a voltage reference solution from industry leader Texas Instruments that offers best-in-class accuracy, ease of operation and low noise characteristics.

Application Field

The LM4121AIM5X-ADJ is a versatile voltage reference designed to provide both adjustable and fixed output reference voltages. Its small 0.6mm x 0.6mm QFN package is an ideal choice for applications that require both cost and space efficiency. Additionally, the device is well suited to applications in both consumer and industrial markets, as it is designed to meet a variety of common industry requirements such as AEC-Q100, IEC60068-2-1 and UL1977 safety requirements.

The LM4121AIM5X-ADJ is used in a wide range of applications, such as Precision Data Converters, Battery Fuel Gauging, Battery Discharge Circuits, Automotive Lighting System and Motor Control, Motor Drive IC Regulator Circuits, Power Good Signal Generation, Battery Chargers and Battery Management Systems. Additionally, the device has found applications in portable medical and portable consumer electronics such as tablets and mobile phones.

Working Principle

The LM4121AIM5X-ADJ is a voltage reference with an adjustable output voltage range of 1.2V to 5V, with a guaranteed accuracy of 0.3%. It uses a cross-regulation architecture which ensures a very low initial accuracy drift over temperature. The device operates on a single voltage supply, and the output voltage is adjusted with an external programming resistor. An integrated overcurrent protection circuit ensures that the device is protected from overtemperature; it will shut down automatically and limit the output current in response to an output voltage overcurrent condition. The device also features an integrated watchdog function, which monitors the input voltage and will shut down the device if the temperature exceeds its maximum rating.

The device is also fabricated using low voltage CMOS technologies which enable superior reliability, long-term performance and incredibly tight initial accuracy drift. The LM4121AIM5X-ADJ also includes additional integrated features such as a low dropout current reference, reverse current protection, remote-on/shutdown and low drift output voltage accuracy.

Overall, the LM4121AIM5X-ADJ is a reliable, cost-effective and power efficient voltage reference solution designed to meet the specific needs of today’s power management applications. Its combination of features and support for both adjustable and fixed output references makes it an ideal choice for a wide range of portable and industrial applications.

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