Current - Output:	3A
Base Part Number:	LP3873
Supplier Device Package:	DDPAK/TO-263-5
Package / Case:	TO-263-6, D²Pak (5 Leads + Tab), TO-263BA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	73dB ~ 57dB (120Hz)
Current - Supply (Max):	15mA
Current - Quiescent (Iq):	9mA
Series:	--
Voltage Dropout (Max):	1.2V @ 3A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	7V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tube

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LP3873ES-2.5 Application Field and Working Principle

IntroductionLP3873ES-2.5 is a voltage regulator especially used in power management in electronics products. It’s name is derived from “Low Power Linear Voltage Regulator” - the LP3873ES-2.5. It is a member of the linear voltage regulator family and it is a low power LDO (low drop-out) regulator meaning it maintains its output voltage with a minimal loss.Application DomainThe LP3873ES-2.5 is found in a wide range of electronic devices, from smartphones and tablets to computers, networking and industrial equipment. In Analogue and Digital Broadcast, LP3873ES-2.5 is widely used in television, satellite and cable TV technologies for current amplifiers, voltage regulators, and reference amplifiers. The LP3873ES-2.5 is also found in automotive, medical and industrial applications.Power RequirementsThe LP3873ES-2.5 supports input voltage from 2.7V to 6.0V and its output voltage can range from 0.7V to 5.0V depending on the input voltage and current. The voltage regulator has an adjustable output voltage, allowing the designer to select the optimal output voltage for their application. The device also supports a wide range of output currents, ranging from 0.5A to 3.0A.Schematic DesignLP3873ES-2.5 is designed to produce a regulated output voltage from an unregulated input voltage. It works by utilizing a voltage divider circuit, or voltage regulator circuit. This circuit is made up of two resistors, one a fixed resistor and the other a variable resistor. The variable resistor is used to adjust the output voltage of the regulator and the fixed resistor is used to set the reference voltage. The reference voltage and the output voltage are compared to one another and the difference in the two is used to control the variable resistor, resulting in a stable output voltage.The design of the LP3873ES-2.5 voltage regulator is simple and efficient. The device comes in a SOT-23 package and utilizes an internal PMOSFET, allowing it to provide a very low dropout performance.AdvantagesUsing LP3873ES-2.5 voltage regulator can bring you many advantages:• Low noise performance — The device has low noise levels, reducing interference and improving system performance.• Low current consumption — An advanced PMOSFET allows the regulator to consume less current, saving power and reducing waste.• Low input and output voltage variability — The device is designed to regulate input and output voltage over a wide range, ensuring reliable performance.• High load transient response — The LP3873ES-2.5 is designed to handle fast load transients, providing a stable output under varying load conditions.• High efficiency — The regulator has an efficiency rate of up to 90%, reducing heat and conserving power.ConclusionThe LP3873ES-2.5 is a versatile voltage regulator suitable for a variety of applications. With its low noise levels, low current consumption and high efficiency levels the device is a great choice for power management. Its compact form factor and simple design make it easy to implement, allowing designers to reduce cycle time and cost of production.

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