LM4050BIM3-5.0/NOPB

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PMIC (Power Management ICs) are critical components for a wide variety of designs, growing ever more important as power system requirement become more complex and power densities become higher. Voltage references are one of the key elements in PMIC designs, providing a stable reference voltage to regulate system performance, protect components from damage, and minimize energy loss. The LM4050BIM3-5.0/NOPB is one of Texas Instruments’ voltage references, offering precision voltage regulation and a wide operating temperature range for easy integration into any application.

Overview

The LM4050BIM3-5.0/NOPB is a single-channel, low-dropout, micropower voltage reference. It provides excellent stability across temperature and is accurate to within ± 0.25% over its operating temperature range (-40 to +125 degrees Celsius). With an input voltage range of 2.5 to 5.5 volts, it can be used in a variety of power-supply designs, including those with low battery levels or very tight voltage control.

The LM4050BIM3-5.0/NOPB provides a low-noise bandgap reference voltage of 2.5 volts and an adjustable output voltage range from 1.2 to 5.5 volts. Low-noise circuitry ensures that the reference voltage is relatively constant across temperature, making this device particularly well-suited for precision voltage regulation and voltage-level monitoring. The LM4050BIM3-5.0/NOPB is available in the metric three-terminal, SOT-23 package.

Application Fields

The LM4050BIM3-5.0/NOPB is well-suited for any application requiring precise and stable voltage regulation in low power designs, such as:

• Battery-powered devices, such as medical equipment and mobile phones
• Circuits requiring precise voltage regulation and constant reference voltages
• Voltage level monitoring
• Portable systems, such as portable computers, tablets and wearable devices
• Applications requiring very tight voltage control, such as power supplies and converters
• Automotive applications such as head unit entertainment systems, power windows and electronic power steering systems

Working Principle

The LM4050BIM3-5.0/NOPB is based on the classic bandgap reference circuit, which uses a bipolar transistor as the active element. The transistor’s emitter current is proportional to its base-collector voltage, and thus a fixed, precise reference voltage is produced. The reference voltage is further stabilized by the device’s low-noise circuitry and temperature compensation.

The LM4050BIM3-5.0/NOPB uses an internal voltage divider network to operate the reference circuit at a constant voltage. This voltage divider allows for an adjustable output voltage, from 1.2 to 5.5 volts, to be set via external resistors. The device also incorporates current limiting and thermal shut-off protection circuitry.

Conclusion

The LM4050BIM3-5.0/NOPB is a versatile, precise and reliable voltage reference for a variety of applications requiring precise regulation of output voltage. With its wide operating temperature range and low-noise circuitry, it is well-suited for battery-powered devices and other low-power application. It is an excellent choice for those requiring a precise, temperature-stable and adjustable voltage reference.

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