LT3081ET7#PBF

Current - Output:	1.5A
Base Part Number:	LT3081
Supplier Device Package:	TO-220-7
Package / Case:	TO-220-7 (Formed Leads)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity, Short Circuit
Control Features:	Current Limit
PSRR:	90dB ~ 20dB (120Hz ~ 1MHz)
Current - Supply (Max):	5mA
Current - Quiescent (Iq):	50µA
Series:	--
Voltage Dropout (Max):	1.5V @ 1.5A
Voltage - Output (Max):	34.5V
Voltage - Output (Min/Fixed):	0V
Voltage - Input (Max):	36V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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LT3081ET7#PBF Application Field and Working Principle

LT3081ET7#PBF is a low-dropout (LDO) linear voltage regulator from the LT3081 family introduced by Linear Technology, a global leader in analog ICs. The LT3081ET7#PBF is designed for versatility and its low quiescent current enables long battery lifetimes with minimal current consumption. It is a member of a family of dropout linear regulators that meet a wide variety of applications.

Application Field

The output of the LT3081ET7#PBF can be adjusted to a voltage as low as 0.9V and as high as 6V, allowing it to be used as a low dropout regulator in a wide variety of applications. Typical applications include post voltage regulator protection and supply line sequencing, post voltage regulator buffering and noise reduction, system level power sequencing, portable computer power supply sequencing, microprocessor supervisory reset circuits, on-card power supply for digital signal processor (DSP) cards, power supply sequencing for power sensitive devices, general purpose low-dropout regulator and PCMCIA card power source regulation.

Working Principle

The LT3081ET7#PBF is a low dropout linear voltage regulator designed to provide output voltage regulation with low dropout. The device operates as a linear regulator by using a PNP transistor as its internal pass device, and controlling the current through the PNP to control the output voltage.In addition, the LT3081ET7#PBF includes a low dropout voltage, wide operating current range and low quiescent current. This produces low noise and allows for more efficient power supply design.When in regulation, the device regulates the output voltage by regulating the current through the PNP to maintain the desired output voltage. When the output voltage exceeds it\'s regulation level or falls below it, the device automatically compensates by modulating the voltage at the PNP\'s base to maintain regulation.Regardless of voltage variations, the LT3081ET7#PBF operates with high accuracy, low noise, and low dropout voltage. In addition, the low quiescent current also helps to minimize power consumption, making it suitable for applications where a small current is needed.

Conclusion

The LT3081ET7#PBF is a member of the LT3081 family of low dropout linear voltage regulators. With its low quiescent current, wide adjustable range, and low noise operation, it is ideal for a wide variety of applications, including post voltage regulator protection, system level power sequencing, portable computer power supply sequencing, microprocessor supervisory reset circuits, and more. By regulating the output current through a PNP, the LT3081ET7#PBF offers high accuracy and stability, even under voltage variations. As such, it is an ideal choice for a variety of low power, low current applications.

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