LT1117IST#PBF

Voltage Dropout (Max):	1.3V @ 800mA
Base Part Number:	LT1117
Supplier Device Package:	SOT-223-3
Package / Case:	TO-261-4, TO-261AA
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Temperature
Control Features:	--
PSRR:	75dB (120Hz)
Current - Output:	800mA
Series:	--
Voltage - Output (Max):	13.8V
Voltage - Output (Min/Fixed):	1.25V
Voltage - Input (Max):	15V
Number of Regulators:	1
Output Type:	Adjustable
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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Introduction

The LT1117IST#PBF is a low dropout voltage regulator with a low quiescent current, suitable for a variety of applications. It provides precise and predictable output voltage regulation that can be programmed with a voltage divider, and provides a high level of protection against overload, over-voltage and reverse polarity. It is particularly suitable for applications that require precise output voltage, low power consumption, and safety and reliability.

Application Field

The LT1117IST#PBF is ideal for various electronic applications ranging from relatively simple consumer electronic solutions to more complex systems such as telecom, embedded, automotive and medical systems. In consumer electronics, the LT1117IST#PBF is used for powering small devices such as handsets, portable music players, navigational systems and similar items. In these applications, the voltage regulator has to provide reliable, consistent output voltages that can meet the specific requirements of the device. The LT1117IST#PBF is also ideal for use in telecommunications, where it is used to power and control the operation of mobile communication infrastructure. In this application, it is important to ensure that the voltage regulator provides stable, reliable power, with no unexpected failures or errors. In automotive and medical applications, the LT1117IST#PBF is an excellent choice for providing precise, reliable and safe voltage regulation. In these applications, the voltage regulator needs to be able to precisely control the output voltages for reliable operation, and needs to be able to withstand the harsh environmental conditions in the vehicles and in medical equipment. Finally, the LT1117IST#PBF is also suitable for use in embedded applications where it is used for a wide range of tasks such as energy conservation, voltage monitoring, power leveling and voltage scaling. In these applications, the LT1117IST#PBF can provide reliable power and precise control of output voltage.

Working Principle

The LT1117IST#PBF is a low dropout linear voltage regulator. It works by taking a constant input voltage and outputting a regulated output voltage that is tailored to the specific needs of each application. In its basic operation, the voltage regulator uses a pair of p-type and n-type MOSFETs to set and regulate the output voltage. When the regulator is in operation, the MOSFETs act as a controllable resistor that adjusts the output voltage to a desired level. When the voltage drops below the desired level, the MOSFETs increase their resistance, thus increasing the output voltage. Likewise, when the voltage is above the desired level, the MOSFETs decrease their resistance, thus decreasing the output voltage. This process is controlled by the internal design of the voltage regulator, so that it is able to maintain an accurate and consistent output voltage.The LT1117IST#PBF also provides protection against overloads and reverse polarity. In the event of an overload, the voltage regulator will automatically shut down, preventing damage to the load. In the event of a reverse polarity, the voltage regulator will detect the fault and shut down, protecting both the load and the voltage regulator.

Conclusion

The LT1117IST#PBF is an ideal low dropout linear voltage regulator for a wide range of applications. It provides precise and accurate voltage regulation that can be programmed with a voltage divider, and provides a high level of protection against overloads and reverse polarity. In addition, it is suitable for use in various applications ranging from consumer electronics to embedded and automotive applications. With its combination of features, the LT1117IST#PBF is an excellent choice for projects requiring reliable, cost-effective and precise voltage regulation.

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