LM4128DMFX-1.8/NOPB

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PMIC - Voltage Reference

LM4128DMFX-1.8/NOPB is a high-precision actively-controlled voltagereference device. This device has a wide operating temperature rangefrom -40°C to +125°C, low noise, fast rise/fall times and lowtotal output drift over temperature. The LM4128DMFX-1.8/NOPB featuresan integrated voltage error amplifier and control circuitry thatallows it to be used either as a standalone controller or as anintegral part of an overall design.

The LM4128DMFX-1.8/NOPB has multiple applications in the fields ofindustrial, computing and telecoms. It can be used for high-precisionvoltage regulation, power supply sequencing, voltage scaling andother applications that require an accurately regulated outputvoltage. This device is also designed to reduce board size and savecosts, by eliminating additional discrete parts or integration intoa power supply design.

The operation of the LM4128DMFX-1.8/NOPB is based upon the erroramplifier regulation principle. A reference input voltage isprovided to the reference pin, this voltage is compared with theoutput voltage. Depending upon how the error amplifier\'s outputsignal and the output voltage are configured, the error amplifierwill either increase or decrease the output voltage until thereference voltage level is achieved.

Two external resistors are used to set the full-scale outputvoltage of the LM4128DMFX-1.8/NOPB. These external resistors alsodetermine the gain of the error amplifier feedback network,which in turn controls the response time to transients in theoutput voltage. The circuit also benefits from increased stabilityprovided by the error amplifier itself.

The LM4128DMFX-1.8/NOPB has a high minimum operating voltage of1.8V and a maximum operating voltage of 4.5V. It has a low outputcapacitance and low output impedance. The device also featurescurrent limiting and thermal overload protection, as well as aninternal reverse input voltage protection diode.

In summary, the LM4128DMFX-1.8/NOPB is a high-precisionvoltage-reference device. It is suitable for use in a wide range ofapplications in industrial, computing and telecoms applications.Its features include a wide operating temperature range, lownoise, fast rise/fall times and low total output drift overtemperature. It is also cost effective, as it reduces the need foradditional discrete components.

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