LM4040BIM7-2.5/NOPB

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A voltage reference IC is a type of linear integrated circuit used to provide a stable, constant reference voltage for use in a variety of power management applications. The LM4040BIM7-2.5/NOPB is a precision micropower shunt regulator that provides 2.5V of fixed output voltage. This device offers low power dissipation and high precision and has a wide range of applications in voltage regulation and reference circuits.

Overview

The LM4040BIM7-2.5/NOPB is a low-power, precision shunt regulator IC offering 2.5V of fixed output voltage. This IC provides extremely precise, low power, and low noise operation. The output voltage is accurate to ±1mV over line, load, and temperature variations and has a maximum initial accuracy of ±0.25%.

This IC operates with a wide voltage range from 2.2V to 15V. It features a low power dissipation less than 0.4mW at room temperature. The device has good temperature coefficient, reverse-input protection, and reverse-output protection features.

Features and Benefits

• Wide operating voltage range from 2.2V to 15V
• High accuracy and precision of ±1mV
• Static current consumption of only 400nA
• Low power dissipation of less than 0.4mW at room temperature
• Good temperature coefficient of 4ppm/°C
• Reverse-input and reverse-output protection

Applications

The LM4040BIM7-2.5/NOPB is suitable for use in a wide range of power management applications such as voltage regulation, reference circuits, and even low dropout regulators (LDOs). It is also useful in monitor circuits, temperature compensated voltage references, as well as current sources and shunt regulators.

This device is typically used in temperature-critical applications, such as fuel gauges, digital thermometers, overvoltage protection, and various analog and digital logic structures. It is suitable for use in communications, automotive and industrial applications.

Working Principle

The LM4040BIM7-2.5/NOPB depends on a simple shunt regulator circuit to provide its precise reference voltage. This involves a variable resistor connected in series with a fixed resistor connected between the output and ground. The variable resistor is connected through an amplifier to the base of a transistor, which is connected to the output. As the output voltage rises, the variable resistor decreases, pushing the amplifier to its saturation point and causing the transistor to reduce its output current. This reduces the output voltage, and the process repeats until the reference voltage is achieved.

Conclusion

The LM4040BIM7-2.5/NOPB is a precision micropower shunt regulator designed to provide 2.5V of fixed output voltage. This device offers high accuracy and precision, low power dissipation, wide operating voltage range, and reverse-input and reverse-output protection. It is suitable for use in a wide range of power management applications and is ideal for temperature-critical applications such as fuel gauges, digital thermometers, and overvoltage protection.

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