LM4125IM5-2.5

Noise - 0.1Hz to 10Hz:	20µVp-p
Base Part Number:	LM4125
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Current - Supply:	290µA
Voltage - Input:	3.3 V ~ 8 V
Noise - 10Hz to 10kHz:	36µVp-p
Series:	--
Temperature Coefficient:	50ppm/°C
Tolerance:	±0.5%
Current - Output:	5mA
Voltage - Output (Min/Fixed):	2.5V
Output Type:	Fixed
Reference Type:	Series
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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IntroductionThe LM4125IM5-2.5 is an integrated voltage reference developed by Texas Instruments that can address a broad range of application needs, spanning from standard usage to low-voltage applications in the industrial, automotive, and communication industries. This device can support logic and memory applications, providing a low-temperature stable reference voltage that is essential for many analog and digital circuits.Application FieldThe LM4125IM5-2.5 is ideal for low power and low noise applications with its reference voltage of 2.5V and a maximum power dissipation of 500mW. It is compatible with a wide variety of power management integrated circuits (PMIC), including buck, boost and charging switches and controllers, and is often used in automotive safety and control systems. The device is also suitable for voltage regulation in other industrial applications and is suitable for communications, computer systems, and MEMs and sensor applications.Due to its low temperature coefficient, the LM4125IM5-2.5 offers good temperature stability and makes it suitable for applications requiring a consistent supply voltage, such as analog to digital converters (ADCs), digital to analog converters, and voltage regulators. The device is also able to enable battery charging systems, while a low quiescent current ensures efficient power saving in battery-powered systems.Working PrincipleThe LM4125IM5-2.5 operates by operating at a certain reference voltage and providing an output voltage that is dependent on the external amplifier voltage. In normal operation, the amplifier voltage is 1.25V and the output is 2.5V, making it suitable for both low-voltage and high-voltage applications.The amplifier voltage is set by the external resistor, allowing the device to operate at different reference voltages than 2.5V. This is accomplished by connecting a resistor between the amplifier input and the reference voltage source. When the amplifier voltage is greater than 1.25V, the reference voltage is increased.The LM4125IM5-2.5 voltage reference also features a power-on reset (POR) pin to ensure a stable and reliable start-up. This pin can be used to reduce slew rate during start-up and protects the output during abnormal power loss conditions.ConclusionThe LM4125IM5-2.5 voltage reference offers low power consumption, good temperature stability, and a wide voltage input range. It is an ideal device for a variety of industrial and automotive applications, including power management, low-temperature stable reference voltage, battery charging systems, ADC, DAC, and voltage regulators. The device also features a POR pin to ensure stable and reliable start-up, making it one of the most reliable devices for these applications.

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