TPS73633DCQ

Current - Output:	400mA
Base Part Number:	TPS73633
Supplier Device Package:	SOT-223-6
Package / Case:	SOT-223-6
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C
Protection Features:	Over Current, Over Temperature, Reverse Polarity
Control Features:	Enable
PSRR:	58dB ~ 37dB (100Hz ~ 10kHz)
Current - Supply (Max):	1mA
Current - Quiescent (Iq):	550µA
Series:	--
Voltage Dropout (Max):	0.2V @ 400mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Voltage - Input (Max):	5.5V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Active
Packaging:	Tube

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The TPS73633DCQ is a general-purpose linear voltage regulator in the TPS7V3xx step-down adjustable and fixed output series of regulators in the Texas Instruments Power Management IC portfolio. It is a type of module that regulates output voltage within a given range to stabilise it. It is vastly used in applications such as industrial control, personal computers, medical, telecommunications, and any other application that needs a steady voltage. This application article details the application field and working principle of the TPS73633DCQ.The TPS73633DCQ is a low-cost, low-Iq, well-suited, adjustable linear mode device with an adjustable output voltage range of 1.2V to 3.3V. With a wide input voltage range of 3V to 16V and low quiescent current of just 100µA in Dropout, it can deliver up to 250mA of fixed or adjustable output current. With some features like low externals components, excellent load and line regulation, low noise, short-circuit and thermal protection, it is suitable for applications such as programmable power supplies, DSPs and FPGAs.The TPS73633DCQ follows the standard design procedure for a linear voltage regulator. It works on the principle of input voltage being regulated to the output voltage. It has three key components, the error amplification and control, the pass element and the feedback element. These three parts work together to bring down the input voltage to the output voltage.The error amplifier is responsible for comparing the output and reference voltage. The voltage reference acts as a reference to the output voltage. This reference is either a precision zener or an IC. Depending on the comparison between the output and reference voltages, the error amplifier amplifies the error voltage. This amplified voltage is sent to the pass element.The pass element is an active device, which responds to a control signal coming from the error amplifier. This element is responsible for regulating the output voltage. It transforms the amplified reference voltage into the output voltage.The last important element of the regulator is the feedback element. This element functions by providing feedback to the error amplifier via a resistor divider. This feedback loop is responsible for maintaining the comparison of the output and reference voltage. This mechanism is called the voltage regulation loop. It helps the error amplifier regulate the output voltage to a fixed value by constantly comparing the output and reference voltage.The TPS73633DCQ is adapted to a variety of applications and most customers find that it provides a reliable performance. This particular device comes in a tiny, 4-pin SOT-23 package, making it ideal for space restricted designs. Its wide input voltage range and low quiescent current makes it suitable for applications that need to conserve energy, saving power and design time.In conclusion, the TPS73633DCQ is a general-purpose linear voltage regulator in the TPS7V3xx step-down adjustable and fixed output series of regulators. It follows a typical design principle for linear voltage regulators that operates with the help of three key components, error amplifier, pass element, and feedback elements. It has a wide input voltage range of 3V to 16V and a low quiescent current of 100µA in Dropout. With its s small packaging and suitability to conserve energy, it is a popular choice among customers and is used in industries and applications such as personal computers, industrial control, medical, telecommunications, etc.

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