LT3027EDD#TRPBF

Voltage Dropout (Max):	0.45V @ 100mA, 0.45V @ 100mA
Base Part Number:	LT3027
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Enable
PSRR:	65dB (120Hz)
Current - Output:	100mA, 100mA
Series:	--
Voltage - Output (Max):	20V
Voltage - Output (Min/Fixed):	1.22V
Voltage - Input (Max):	20V
Number of Regulators:	2
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to LT3027EDD#TRPBF

LT3027EDD#TRPBF is a low-dropout (LDO) linear regulator specifically designed for battery-operated and portable applications. This device has very low operating current of 150uA and very low quiescent current of 50uA, helping it to achieve an extremely low dropout voltage.

Application Fields

The LT3027EDD#TRPBF is suitable for a variety of battery-operated and portable applications. Typical applications include mobile phones, personal digital assistants (PDAs), digital cameras, music players, and other pocket-sized portable devices. In addition, LT3027EDD#TRPBF can be used in many applications where the requirement of low current operation and low dropout voltage are paramount. LT3027EDD#TRPBF is also suited for both single- and dual-cell Li-Ion/Polymer applications or any other battery applications that require very low quiescent current. Like most LDO regulators, this device can also be used for any general purpose low voltage regulation needs.

Features

The LT3027EDD#TRPBF has many features that make it ideal for portable and battery-operated applications. It provides a very low operating current of 150uA, very low quiescent current of 50uA, low dropout voltage of 50mV, and good output voltage accuracy. It also features a high PSRR of 65 dB at 1 kHz, which helps it to reject noise from the power supply. The device is also capable of supplying up to 1A of continuous output current.LT3027EDD#TRPBF features an internal high-side and low-side protection circuitry to protect the device against high voltage transients. It also has built-in current limit protection, which monitors the input current and shuts down the regulator in case of an overload. It also has an over temperature protection feature which shuts down the device in case of an over-temperature condition.

Working Principle

The essential operation of a voltage regulator is to maintain a constant output voltage regardless of variations in input voltage or load conditions. The LT3027EDD#TRPBF follows the same principle. It maintains a constant output voltage by using a feedback loop to adjust the voltage drop across a pass element, such as a transistor. The feedback loop adjusts the pass element in a way that maintains the output voltage at the same level as the reference voltage. The LT3027EDD#TRPBF uses a low-dropout (LDO) linear regulator in its feedback loop. This type of regulator consists of a reference voltage, an error amplifier, a current limiter, and a pass element. The reference voltage is used to set the desired output voltage. The error amplifier compares the actual output voltage with the reference voltage and increases or decreases the voltage drop across the pass element accordingly. The current limiter prevents the regulator from sinking too much current and protects the pass element from damaging overloads. The pass element is then used to regulate the output voltage.

Conclusion

The LT3027EDD#TRPBF is a low-dropout (LDO) linear regulator specifically designed for battery-operated and portable applications. It offers very low operating current and quiescent current, low dropout voltage, good output voltage accuracy, high PSRR, and protection against high voltage transients, current limit, and over-temperature condition. The device follows the same basic principle as other voltage regulators by using a low-dropout linear regulator in its feedback loop. The LT3027EDD#TRPBF is suitable for applications such as mobile phones, PDAs, digital cameras, and music players.

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