LM4040BIM3-3.0+T Integrated Circuits (ICs)

Noise - 0.1Hz to 10Hz:	--
Base Part Number:	LM4040
Supplier Device Package:	SOT-23-3
Package / Case:	TO-236-3, SC-59, SOT-23-3
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Current - Cathode:	67µA
Current - Supply:	--
Voltage - Input:	--
Noise - 10Hz to 10kHz:	45µVrms
Series:	--
Temperature Coefficient:	100ppm/°C
Tolerance:	±0.2%
Current - Output:	15mA
Voltage - Output (Min/Fixed):	3V
Output Type:	Fixed
Reference Type:	Shunt
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Power Management Integration Circuits (PMIC) are increasingly becoming an integral part of circuit designs for managing power, and the LM4040BIM3-3.0+T Voltage Reference is one such PMIC. It is a three-terminal adjustable voltage reference that provides an accurate and stable output voltage References in the range of 0.3V to 3.0V. It is a low-noise, low power performance reference that is ideal for use in various applications such as input voltage level shifting or VLIW operation and other programming applications. Here, we will discuss the typical application field and the operation principle of the LM4040BIM3-3.0+T Voltage Reference.

Application Field

The LM4040BIM3-3.0+T can be used in a wide variety of applications such as Analog-to-digital converters, battery charging and monitoring, voltage limits and safety, voltage regulators, programmable clock generators, interface circuits and other reference hardware. It can provide an adjustable output voltage in the range of 0.3V to 3.0V with a accuracy of ±2% over temperature and line. It also provides excellent line and load regulation owing to its stable references.In addition, it comes with a soft-start circuitry that reduces input current on start-up, allowing the power supply to maintain a stable output when power is supplied. This voltage reference also provides low-noise operation, earless output short-circuit protection and temperature coefficient of 2% over temperature. Thus, it can be used in a variety of applications to provide highly accurate reference voltages.

Working Principle

The LM4040BIM3-3.0+T is based on the (HID-IMS) Interface Overview Reference Design, which provides a current-steering voltage reference. The device provides a nominal output voltage of 1.2V with an output impedance of 460 ohms, making it ideal for high current/low voltage applications.The voltage reference uses a high accuracy temperature compensation technique to ensure a stable output voltage over temperature variations. The reference is generated using a temperature sensitive resistor, which is connected between the ground and the output pin to generate a voltage that is independent of the temperature and any external factors.The output voltage is controlled using a trimming circuit. This circuit is composed of a PMOS transistor and a resistor connected to ground and the input terminal respectively. The resistive network is optimized to provide a flat line of output voltage in response to adjustment of the trimming voltage.The output voltage is further monitored by a negative feedback loop, which keeps the output voltage within the specified range by controlling the current flow. This loop also helps in maintaining output impedance and provides a positive load regulation in systems with varying loads.ConclusionThe LM4040BIM3-3.0+T is an adjustable voltage reference that provides a low-noise, low power performance reference with excellent line and load regulation. It is suitable for a wide range of applications, such as input voltagelevel shifting and VLIW operation, and other programming applications. The reference employs a high accuracy temperature compensation technique to ensure stability of the output voltage over temperature variations, and a negative feedback loop to keep the output voltage within the specified limits. The device is also provided with soft-start circuitry for reducing input current on start-up.

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