LM2931Z-5.0RA

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The LM2931Z-5.0RA (hereafter referred as LM2931Z) is a linear voltage regulator that belongs to the PMIC voltage regulators class. It is a three-terminal device with limited input and output voltage ranges, intended for controlling either the positive or negative output voltages. It monitors both the input and the output voltages, limits the current absorbed by the load and provides a very accurate regulation level.

The chip is built around a low-power MOSFET and is controlled by two zeners and two precision source followers. They are arranged in a voltage divider configuration to provide the regulated output voltage. One of the zeners is used for the gate voltage and the other to provide the reference voltage for each stage. The current sensing for the MOSFET is handled by the local voltage feedback network.

The LM2931Z application field is mostly in switching power supplies, linear regulators and DC-DC converters. It can handle up to 5A currents and provide an amazingly precise 5.0V output. It offers high current limit control of output current and is easy to around.

This voltage regulator also features a number of protection features that makes it suitable for a variety of applications. It offers thermal overload protection, input and/or output overvoltage protection, as well as an adjustable overcurrent protection. The overcurrent limit is controlled by one external resistor, while the other protection features are engaged via pin strapping and/or external components.

The LM2931Z features an excellent load and line regulation, an extremely low dropout voltage of 2.5V and an extremely accurate output voltage of 5V (+/-2.5 mV). The regulator is designed to operate over a junction temperature range of -40 to 85°C and can operate over a wide range of input voltages from 9V to 40V.

The LM2931Z-5.0RA is a top choice for applications that require a linear voltage regulator with low input and output noise, low quiescent current, high load and line regulation, and an adjustable current limit. It combines an effective protection system, an extremely accurate voltage and a wide input voltage range, to make it one of the top choices for applications in switching power supplies, linear regulators, and DC-DC converters.

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