TC1189TECTTR

Current - Output:	120mA
Base Part Number:	TC1189T
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	--
Current - Quiescent (Iq):	90µA
Series:	--
Voltage Dropout (Max):	0.24V @ 100mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.15V
Voltage - Input (Max):	6V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction TC1189TECTTR is a linear voltage regulator device manufactured by Texas Instruments. It is a single-channel, micro-power linear regulator that monitors and maintains an accurate output voltage over a wide range of input voltage and temperatures. It is used to provide power to low noise, precision circuits. This device is available in 8-pin DIP and SOIC packages. Application Field TC1189TECTTR can be used in applications such as noise sensitive precision systems, low dropout regulators, batteries powered systems, and temperature-sensitive systems. It is also suitable for use in portable applications such as battery-powered cameras, PDAs and cellular phones. Features The key features of the TC1189TECTTR include low power operation, low quiescent current, adjustable output voltage, over current protection, 3% initial accuracy, thermal shutdown protection and wide operating temperature range. The quiescent current of the TC1189TECTTR is typically 1uA. This device offers excellent line and load regulation. Its output voltage is adjustable using external resistors and it provides a maximum output current of 200mA. The TC1189TECTTR is highly stable and can be used in industrial applications as well.Working Principle The TC1189TECTTR is a linear voltage regulator device that utilizes a PNP pass transistor to control the output voltage. One of the three terminal pins is a voltage sensing pin; this pin senses the reference voltage, which gives an indication of the desired output voltage. A circuit coupling the output voltage and the reference voltage forms a loop; this loop selectively directs current to the output load. The two other pins on the TC1189TECTTR correspond to the enable and input voltage. The enable pin allows the regulator to be turned on or off on demand and the input voltage pin supplies the power for the regulator. The enable pin also controls the output stage of the device. When the enable pin is tied to a logic high, current flows from the input voltage pin to the output load; this causes the output to raise to its regulation point. When the enable pin is tied to a logic low, the output stage shuts off, stopping current flow between the input voltage pin and the output load. This reduces the output voltage to zero. Conclusion The TC1189TECTTR linear voltage regulator device is an excellent choice for noise sensitive precision systems and low dropout regulators. It has a quiescent current of 1uA, adjustable output voltage and excellent line and load regulation. The enable pin allows the regulator to be turned on or off on demand and the device provides thermal shutdown protection and wide operating temperature range. This device is ideal for use in portable applications, such as battery-powered cameras, PDAs and cellular phones.

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