REG1117-3.3/2K5G4

Current - Output:	800mA
Base Part Number:	REG1117
Supplier Device Package:	SOT-223-4
Package / Case:	TO-261-4, TO-261AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	--
PSRR:	62dB (120Hz)
Current - Quiescent (Iq):	10mA
Series:	--
Voltage Dropout (Max):	1.2V @ 800mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	15V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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REG1117-3.3/2K5G4 Application Field and Working Principle

Introduction

REG1117-3.3/2K5G4 is a reliable, linear, high-accuracy voltage regulator, designed for systems requiring an adjustable or fixed output voltage. It is designed for Worldwide use with high power efficiency. It comes in either an SOT-223 packageor an exposed iron TO-220 package.

Application Field of REG1117-3.3/2K5G4

REG1117-3.3/2K5G4 is ideal for applications that need a fixed or adjustable output voltage and low dropout voltage for battery-powered or DC-to-DC systems applications. It is especially suited for use in battery powered products, such as laptops, media players and other mobile communications devices. It is also suitable for automotive, consumer and industrial control applications. It is also used in applications that require high precision, such as medical, personal computer, robotic and office equipment.

Working Principle of REG1117-3.3/2K5G4

The REG1117-3.3/2K5G4 is a three-terminal linear voltage regulator that utilizes an internal p-type MOSFET transistor as the pass element. The output voltage is adjustable via an external resistor divider or it can be set at the factory for a fixed output voltage. The output voltage can be adjusted from 2.5V to 12V.The MOSFET transistor regulates a constant output voltage by using feedback from an internal voltage reference. This voltage reference is programmed to a nominal 1.235V and is derived from an internal band gap reference.The input voltage range is from 2.0V to 18V. The typical power dissipation is 30mW @ 20°C. The maximum quiescent current draw is typically 2mA for a 2.5V output and 10mA for 12V output.

Conclusion

The REG1117-3.3/2K5G4 is a reliable, linear, high-accuracy voltage regulator, perfectly suited for various battery-powered, automotive, consumer and industrial control applications. It is easy to use and provides both adjustable and fixed output voltage functions. Its internal p-type MOSFET transistor is able to maintain a narrow differential between the input and output voltage which ensures high power efficiency. The nominal 1.235V voltage reference ensures accuracy and the need of low quiescent current allows it to be used in both DC-to-DC and battery-powered systems. Altogether REG1117-3.3/2K5G4 is a great choice for people who need an adjustable or fixed output voltage with high accuracy.

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