LT3015ET-3.3#PBF

Current - Output:	1.5A
Base Part Number:	LT3015
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, Reverse Polarity
Control Features:	Enable
PSRR:	61dB (120Hz)
Current - Supply (Max):	70mA
Current - Quiescent (Iq):	2.4mA
Series:	--
Voltage Dropout (Max):	0.68V @ 1.5A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	-3.3V
Voltage - Input (Max):	-30V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Negative
Part Status:	Active
Packaging:	Tube

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LT3015ET-3.3#PBF Application Field and Working Principle

The LT3015ET-3.3#PBF is a precision dual-channel low dropout (LDO) linear voltage regulator that can operate down to a 3.3V output while only requiring 750mV at the input. It features low noise, high line and load regulation, and very high accuracy that makes it ideal for power supply regulation in a wide range of applications. It can also act as a voltage reference and voltage buffer in portable and low power DC-DC power conversion designs.

Feature Overview

The LT3015ET-3.3#PBF features an ultra-low dropout voltage of 200mV. This enables the use of low cost ceramic capacitors for fast transient response and high PSRR. The regulator also has a wide operating temperature range of -40°C to 125°C and the ability to operate from a voltage source as low as 2.7V, making it suitable for many applications. The device also has a high-impedance N-channel MOSFET pass element, which provides fast transient response, low output voltage ripple, and high line and load regulation.

Applications

The LT3015ET-3.3#PBF is suitable for a wide range of applications, including automotive, consumer, industrial, medical, portable, and telecom applications. It can be used in portable battery-powered systems requiring very low dropout voltage and low quiescent current. It can also be used in point-of-load DC-DC converters and power supply designs where low noise, high accuracy, and low output voltage ripple are desired.

Working Principle

The LT3015ET-3.3#PBF utilizes a two-phase architecture for the high-impedance pass element. This allows for the device to be used in applications requiring a very low dropout voltage, while still providing fast transient response, low output voltage ripple, and very good line and load regulation.The main feature of the device is the low dropout voltage. This is achieved by using a high-impedance N-channel MOSFET pass element with a feedback circuit in order to maintain the output voltage within a very tight tolerance.The device also features a current limit protection, which prevents excessive current flow to the output of the device due to an overload or short circuit condition. In addition, there is thermal protection which shuts down the device if the internal temperature exceeds a certain limit.

Conclusion

The LT3015ET-3.3#PBF is a precision dual-channel low dropout linear voltage regulator that can operate down to a 3.3V output while only requiring 750mV at the input. It has a wide operating temperature range, low dropout voltage, high line and load regulation, and very good accuracy. It is suitable for a wide range of applications, including automotive, consumer, industrial, medical, portable, and telecom applications. It is an ideal choice for low power DC-DC power conversion designs and offering low noise performance, good transient response, and very low output voltage ripple.

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