LM4128AMFX-3.3

Noise - 0.1Hz to 10Hz:	310µVp-p
Base Part Number:	LM4128
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Current - Supply:	100µA
Voltage - Input:	3.7 V ~ 5.5 V
Noise - 10Hz to 10kHz:	--
Series:	--
Temperature Coefficient:	75ppm/°C
Tolerance:	±0.1%
Current - Output:	20mA
Voltage - Output (Min/Fixed):	3.3V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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<h3>LM4128AMFX-3.3 Application Field and Working Principle</h3><p>The LM4128AMFX-3.3 is a precision, low-cost voltage reference designed for use in Power Management Integrated Circuits (PMIC). It is designed to provide a low output impedance that is stable over temperature and supply variations, making it ideal for use in voltage regulators and other circuit protection applications.</p><p>The LM4128AMFX-3.3 is available in two output voltage options - 3.3V and 4.5V. Both versions have a temperature coefficient of 0.1µV/°C, which means that the output voltage is stable over a wide range of temperatures. It also has an extremely low output noise of less than 300µV max, making it suitable for use in sensitive applications.</p><p>The LM4128AMFX-3.3 is designed to provide a low output impedance and high accuracy under a wide range of conditions. It is capable of handling input voltage between 1.7V and 5.5V, and a load current up to 1A. It also features a maximum output voltage tolerance of 1%.</p><p>In terms of working principle, the LM4128AMFX-3.3 is an IC that provides a highly accurate and low-noise output voltage reference. It contains an internal voltage reference circuit and a voltage feedback loop, which maintain output accuracy under temperature and supply variations. The input voltage is converted to a corresponding output voltage by the reference circuit, while the feedback loop adjusts the output voltage to maintain accuracy. The voltage reference is also used to set the output voltage range, which is typically within 1%.</p><p>As a PMIC, the LM4128AMFX-3.3 is suitable for a variety of applications, including voltage regulators, system voltage monitors and overvoltage/overcurrent protection circuits. It provides a simple, low-cost and reliable solution for these applications, and is capable of handling a wide range of inputs and loads.</p><p>In conclusion, the LM4128AMFX-3.3 is a precision, low-cost voltage reference ideally suited for use in power management integrated circuits. It features a low output impedance, high accuracy and low-noise output voltage, and is capable of handling a wide range of input voltages and loads. The LM4128AMFX-3.3 is therefore suited to a variety of applications, including voltage regulators, system voltage monitors and overvoltage/overcurrent protection circuits.</p>

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