TPS79433DCQ

Current - Output:	250mA
Base Part Number:	TPS79433
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, Under Voltage Lockout (UVLO)
Control Features:	Enable
PSRR:	65dB ~ 40dB (100Hz ~ 100kHz)
Current - Quiescent (Iq):	220µA
Series:	--
Voltage Dropout (Max):	0.2V @ 250mA
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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Introduction

TPS79433DCQ is a low voltage linear voltage regulator, which belongs to the PMIC (Power Management IC) family. It integrates a pass element, a reference voltage source and two error amplifiers into a single IC package, allowing it to produce a regulated output voltage. This voltage regulator can provide a further voltage alter rate of up to 10% over the full temperature and load conditions, including line and the load transient variations. So, this regulator is specifically designed for low voltage applications such as automotive, telecommunications and instrumentation.

Application field of TPS79433DCQ

TPS79433DCQ can be used in many different fields. Generally speaking, it is applied in low voltage applications such as automotive, telecommunications, instrumentation and records like PDAs and digital cameras. In automotive applications, the TPS79433DCQ can provide a stabilized voltage for the various ECU components in the car, such as engine control, fuel injection, transmission control and chassis control. In the telecommunications field, this voltage regulator can supply a stabilized voltage to the various components in the telecommunication systems, like base stations and analog/digital exchanges. It can also be applied for low voltage analog and digital signals in instrumentation applications, records and media players.

Working principle of TPS79433DCQ

TPS79433DCQ works by converting the original unregulated DC power into a regulated power supply. It basically consists of three main parts: an error amplifier, a reference voltage and a pass element. The error amplifiers acts as the controller of the voltage regulator and it compares the output voltage with the reference voltage, which is determined by a bandgap reference. The pass element is connected to the error amplifier, so when the error amplifier detects that the output voltage has exceeded the reference voltage, it will send a signal to the pass element to adjust the output current, so that the output voltage will decrease. On the other hand, if the error amplifier detects that the output voltage is lower than the reference voltage, it will send a signal to the pass element to increase the output current, so that the output voltage will increase. In this way, the TPS79433DCQ is able to maintain a steady output voltage over a range of varying input and load conditions.

Conclusion

In conclusion, TPS79433DCQ is a low voltage linear voltage regulator that is designed for low voltage applications such as automotive, telecommunications and instrumentation. It integrates a pass element, a reference voltage source and two error amplifiers into a single IC package, allowing it to produce a regulated output voltage. It works by converting the original unregulated DC power into a regulated power supply and it can provide a further voltage alteration rate of up to 10% over the full temperature and load conditions, including line and the load transient variations. This allows it to maintain a steady output voltage over a range of varying input and load conditions.

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