TPS76333QDBVRG4Q1

Current - Output:	150mA
Base Part Number:	TPS76333
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Enable
PSRR:	60dB (1kHz)
Current - Supply (Max):	140µA
Current - Quiescent (Iq):	100µA
Series:	Automotive, AEC-Q100
Voltage Dropout (Max):	0.5V @ 150mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	10V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction
The TPS76333QDBVRG4Q1 is a low-dropout (LDO) voltage regulator that is part of Texas Instruments’ series of devices can provide an output voltage from 0.8V to 3.3V. The low-dropout feature allows it to regulate smaller differences between input and output voltage - permitting the device to draw extremely low quiescent current. The TPS76333QDBVRG4Q1 is well-suited for applications such as battery-powered equipment and mobile communications. The device offers a full protection suite, including short-circuit, thermal and over-current protection. This article aims to provide a detailed overview of the TPS76333QDBVRG4Q1, covering its application field and working principle.

Application Field
The TPS76333QDBVRG4Q1 is designed for applications requiring low-dropout voltage regulation, such as battery-powered equipment, mobile communications, and automotive applications. Its low-dropout feature allows the device to regulate smaller differences between input and output voltage, enabling it to draw extremely low quiescent currents. Moreover, it offers a range of protection features, including short-circuit, thermal and over-current protection.

In automotive applications, the TPS76333QDBVRG4Q1 is often employed for power supply sequencing. When one system component needs to supply power before another component can do so, power sequencing is needed to prevent the two from competing for power. The TPS76333QDBVRG4Q1’s low-dropout voltage regulation allows it to be used in sequence circuits, since it can regulate smaller differences between input and output voltages, although the device can draw higher quiescent current than some alternatives. As a result, it can provide precise control and accurate voltage regulation for precise power distribution.
Working Principle
The TPS76333QDBVRG4Q1 is a low-dropout voltage regulator, meaning that its voltage regulation range is typically less than 1V. The device achieves this by drawing very low quiescent current, as it is capable of regulating even small voltage differences between its input and output.

The TPS76333QDBVRG4Q1 is designed with a bandgap reference, which is essentially a reference voltage that is generated by a voltage subtractor circuit. The bandgap reference is used to detect the output voltage, and the output voltage is compared to the reference voltage. If there is a difference, the error amplifier adjusts the input voltage. This is done in order to keep the output voltage at the desired level. The TPS76333QDBVRG4Q1 is capable of providing an output voltage of up to 3.3V and is equipped with an enable pin, which allows for power on/off control.
Conclusion
The TPS76333QDBVRG4Q1 is a low-dropout voltage regulator designed for applications requiring precise voltage regulation and low quiescent current. Its low-dropout feature allows it to regulate small differences between its input and output, providing accurate voltage regulation. In addition, the TPS76333QDBVRG4Q1 is equipped with protection features such as short-circuit, thermal and over-current protection. These features make the TPS76333QDBVRG4Q1 well-suited for battery-powered equipment, mobile communications, and automotive applications.

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