LM4041AIM3-1.2/NOPB Integrated Circuits (ICs)

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PMIC or power management integrated circuits are responsible for a variety of voltage regulation tasks. Voltage reference ICs within the power management integrated circuit family are dedicated to calculate, compare and adjust an output voltage to a predefined reference signal. This family of integrated circuits falls under the discrete component categories of voltage regulators, voltage references and voltage supervisor/monitor ICs. The LM4041AIM3-1.2/NOPB is one of the most popular voltage reference ICs.

The LM4041AIM3-1.2/NOPB is a temperature-compensated voltage reference IC operating over a wide range of temperature (from -40°C to +85°C). Manufactured in the small TO-92 (3-pin) package, it can provide an output current of up to 1.2mA and up to 1.245V of output voltage, which is typically just a few millivolts below the exact voltage requested.

The LM4041AIM3-1.2/NOPB is designed for applications that require excellent accuracy and low noise characteristics in a wide range of temperatures. It is suitable for applications such as precision analog-to-digital converters, instrumentation devices, audio amplifiers and RTD sensors. Its power-saving and adjustable voltage feature makes it ideal for many low-power applications.

The LM4041AIM3-1.2/NOPB is powered from a single bipolar supply voltage between 2.5V and 12V, or from a unipolar supply voltage greater than 4.7V. The output is a linearized version of the 2.5V reference. This IC has three pins, with each pin having a specific purpose: Pin 1 is the ground (GND); pin 2 is the 2.5V reference; and pin 3 is the output (OUT). Depending on the external components used, the OUTPUT pin can provide up to 1.2mA of supply current.

The operation of the LM4041AIM3-1.2/NOPB is based on the temperature-compensated bandgap reference architecture, which utilizes the inherent mismatch of two different transistors to create a voltage close to a desired reference voltage. This reference voltage is then converted to a current source by the PNP current mirror. An external resistor is connected to the reference voltage through the current mirror. The current flowing through the external resistors is used to generate the desired output voltage.

The LM4041AIM3-1.2/NOPB also employs junction temperature compensation that enables the circuit to maintain its accuracy over temperature variations. The compensation circuit adjusts the 2.5V bandgap reference by sensing the junction temperature and controlling the voltage of the reference output pin. The self-heating mechanism of the transistor junction is used to provide the temperature-dependent output bias.

LM4041AIM3-1.2/NOPB is a great choice for achieving accurate and stable voltage references in battery-powered, highly reliable and/or tight temperature applications. With its tiny 3-pin TO-92 package and low power consumption, it is an ideal choice for tight space applications. Additionally, its low cost, excellent temperature stability and accuracy, wide input voltage range and adjustable output current make it an excellent choice for a variety of applications.

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