TC1173-3.3VOA

Current - Output:	300mA
Base Part Number:	TC1173
Supplier Device Package:	8-SOIC
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature
Control Features:	Enable
PSRR:	60dB (1kHz)
Current - Quiescent (Iq):	90µA
Series:	--
Voltage Dropout (Max):	0.48V @ 300mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	6V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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PMIC - Voltage Regulators - Linear

Voltage regulators are vital components of power management systems. They ensure that an electronic device operates within acceptable voltage limits, preventing it from becoming damaged due to high or low voltages. Linear voltage regulators are widely used for voltage regulation in power supplies, though there are several other types of voltage regulators.The TC1173-3.3VOA is a 3.3V low dropout (LDO) linear voltage regulator designed specifically for applications where low input voltages, low quiescent currents, and high efficiency are necessary. It features superior power supply rejection ratio, excellent load and line regulation, and low output voltage noise. The TC1173-3.3VOA offers current limiting and thermal protection so that excess current and heat do not damage the device or system.The typical application field of the TC1173-3.3VOA is in power management and energy harvesting. Its low quiescent current makes it ideal for applications where extended battery life is needed. The low dropout voltage prevents it from consuming too much power, making it suitable for applications where the input voltage is highly unstable. It is also suitable for use in portable or mobile applications, where the efficient use of power is critical.Working PrincipleThe TC1173-3.3VOA linear voltage regulator works by using a NPN BJT-- or bipolar junction transistor-- to compare the voltage at its input and output. It adjusts the input current by using a feedback loop that monitors the output voltage and then adjusts the voltage difference between the input and the output.The input voltage is applied to the device’s input terminal while the output voltage is taken from the output terminal. The NPN BJT inside the device compares the two voltages and then regulates the flow of current so that the output voltage is equal to the reference voltage.The output voltage is also adjusted by the current limit and thermal protection features of the device. The current limit allows the device to limit the output current to safe operating levels, while the thermal protectioni prevents the device from overheating.ConclusionThe TC1173-3.3VOA is an efficient linear voltage regulator that is suited for use in power management and energy harvesting applications. Its low quiescent current and low dropout voltage make it ideal for low-power applications and for battery-based systems. Its NPN BJT compares the input and output voltages and adjusts the current flow to maintain the output voltage. It also has protection features such as current limiting and thermal protection that prevent the device or system from becoming damaged due to high or low currents.

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