LP3965ET-ADJ

Current - Output:	1.5A
Base Part Number:	LP3965
Supplier Device Package:	TO-220-5
Package / Case:	TO-220-5 Formed Leads
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Short Circuit
Control Features:	Enable
PSRR:	60dB ~ 40dB (120Hz)
Current - Supply (Max):	15mA
Current - Quiescent (Iq):	9mA
Series:	--
Voltage Dropout (Max):	0.55V @ 1.5A
Voltage - Output (Max):	5.1V
Voltage - Output (Min/Fixed):	1.216V
Voltage - Input (Max):	7V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Not For New Designs
Packaging:	Tube

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LP3965ET-ADJ Application Field and Working Principle

Linear voltage regulators are some of the most commonly used power management components (PMIC) used in electronic devices and integrated circuits. One example is the LP3965ET-ADJ, a low-noise, low-dropout, 1.2A linear regulator with adjustable output voltage. This regulator includes an Enable pin, and can be used for low noise, large capacitive loads and is optimized for very low output noise.

Application Field

The main application of the LP3965ET-ADJ is as a power supply regulator for audio and other low noise applications that require low-noise, low-dropout DC/DC conversion. The Enable pin can be used to reduce the quiescent current down to close to zero, making it suitable for portable applications. Its excellent electrical and thermal performance make it suitable for high-bandwidth applications.

Features

This device includes many features that make it highly desirable for low-noise and low-dropout voltage regulation applications. The main features are:- Low-dropout voltage is only 300 mV at 1 A output.- Low-noise operation, which is optimized for applications requiring low noise.- Adjustable output voltage from 1.2V to 5.5V.- Enable pin to reduce quiescent current to zero.- Thermal protection circuitry for over-temperature protection.- Internal, high-precision amplifier with temperature stability of 1.5 mV/°C.

Working Principle

The LP3965ET-ADJ is a low-noise, low-dropout linear voltage regulator designed for low-noise, high-precision voltage regulation. The device consists of an internal amplifier, a large selection of external components, and a PNP transistor.The internal amplifier consists of a small resistor and a capacitance network that provides a large dynamic range and excellent temperature stability. The output voltage is determined by the ratio of the resistor and capacitance values. The internal amplifier is factory preset at the desired voltage.In order to provide high-precision voltage regulation, the amplifier has a high input impedance and a low output impedance. The output is connected to the PNP transistor, which is used to provide current limiting and temperature protection. The Enable pin is used to control the operation of the regulator, and can be used to reduce the quiescent current down to close to zero.

Conclusion

The LP3965ET-ADJ low-noise, low-dropout linear voltage regulator is a highly versatile and reliable power supply solution that can be used in many different applications. It features adjustable output voltage, low-noise operation, and can be used to reduce quiescent current down to close to zero. Its optimized performance makes it suitable for high-bandwidth applications, and it offers excellent electrical and thermal performance.

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