LM4040BIM3X-5.0/NOPB

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PMIC, or Power Management Integrated Circuit, provides power management and control applications. Voltage Reference is one important category of PMIC. This article focuses on the application field and working principle of LM4040BIM3X-5.0/NOPB, which belongs to Voltage Reference.

The LM4040BIM3X-5.0/NOPB series products are designed in SOT-23 package. These precision, easy-to-use low-voltage shunt reference devices include an internal lossless current source for improved accuracy. Operating temperature range of this series is from -40℃ to 125℃, and the accuracy of voltage is 1.5ppm/℃ over the -40℃ to +125℃ range.

The applications of LM4040BIM3X-5.0/NOPB include regulating negative voltages, memory back up and portable instrumentation. This series of devices can be used to regulate negative voltages from 0V to -7V. In the case of low voltage batteries, the device can sense an under voltage condition and shut down the system. This series of device also has a tolerance to an input voltage rejection of 10%. This is suitable for cases where the power supply voltage is noisy, or not stable. The internal high current bias also offers advantages in high current/high noise applications that require low noise and low drift.

The working principle of LM4040BIM3X-5.0/NOPB series is that it is composed of a band-gap voltage reference and a low-noise, low-offset operational amplifier. The device can operate from one power supply or two power supplies. The operational amplifier serves as the buffered output stage to provide a low impedance output, and the voltage reference supplies a stable reference voltage. The bandwidth of the device is more than 10KHz, which is suitable for most applications.

To sum up, LM4040BIM3X-5.0/NOPB is an important device that belongs to Voltage Reference of PMIC. This series of devices is suitable for regulating negative voltages, memory back up and portable instrumentation. The working principle is that it is composed of a band-gap voltage reference and a low-noise, low-offset operational amplifier. The accurate working temperature range is from -40℃ to 125℃, the accuracy of voltage is 1.5ppm/℃, and the bandwidth of the device is more than 10KHz.

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