LP38859T-0.8/NOPB

Current - Output:	3A
Base Part Number:	LP38859
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, Under Voltage Lockout (UVLO)
Control Features:	Soft Start
PSRR:	80dB ~ 65dB (120Hz ~ 1kHz)
Current - Supply (Max):	15mA
Current - Quiescent (Iq):	8.5mA
Series:	--
Voltage Dropout (Max):	0.45V @ 3A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	0.8V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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Introduction

LP38859T-0.8/NOPB is a linear voltage regulator controller designed for use in a wide range of industrial, automotive, and consumer applications. With its high level of power conversion efficiency and adjustable voltage settings, LP38859T-0.8/NOPB is a cost-effective solution for both positive and negative regulators. The LP38859T-0.8/NOPB has a wide input voltage range (up to 42.0 V) and is capable of delivering up to 14 A of output current.

Application Field

LP38859T-0.8/NOPB is commonly used in a variety of applications, including automotive systems, consumer electronics, industrial power supplies, and lighting systems. In automotive systems, the LP38859T-0.8/NOPB is used to regulate the voltage supplied to various components and subsystems, including the engine control unit, transmission control unit, and instrument clusters. In consumer electronics, the LP38859T-0.8/NOPB is used to reduce the noise level of the power supply and limit power consumption, as well as allowing for the use of lower-voltage components. The LP38859T-0.8/NOPB is also used in industrial power supplies to provide a reliable and accurate voltage regulation and can be used in LED and DC lighting systems to improve the efficiency of the light output.

Design Parameters

LP38859T-0.8/NOPB is designed with a voltage controlled pulse width modulation (PWM) architecture and operates at up to 1.2 MHz switching frequency. It offers adjustable output voltage up to 42 V, programmable over-current protection, over-temperature protection, and under-voltage lockout (UVLO). The device features a current limit function, open loop rise time compensation, load-line regulation, and remote sensing. Additionally, the LP38859T-0.8/NOPB supports remote enable/disable and pulse-by-pulse current limiting with thermal foldback.

Working Principle

LP38859T-0.8/NOPB works using an on/off pulse width modulation method. An internal oscillator triggers a PWM signal which is periodic. When the voltage at the input increases, the PWM signal will be higher than the corresponding voltage, while when the input voltage decreases, the PWM signal will be lower than the corresponding voltage.The PWM signal then sets the output voltage of the LP38859T-0.8/NOPB. Depending on the load characteristics, the LP38859T-0.8/NOPB will adjust the output voltage accordingly. If the output voltage is too high, the PWM signal will decrease and the output voltage will drop. Conversely, if the output voltage is too low, the PWM signal will increase and cause the output voltage to rise.

Conclusion

LP38859T-0.8/NOPB is an efficient and reliable linear voltage regulator controller suitable for a wide range of industrial, automotive, and consumer applications. With its adjustable voltage settings, power conversion efficiency and wide input voltage range, LP38859T-0.8/NOPB provides a cost-effective solution for positive and negative regulators. The device is designed with an efficient on/off PWM method and includes a variety of safety features such as open-loop rise time compensation, current-limit protection, and over-temperature protection.

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