TPS7425DR

Current - Output:	200mA
Base Part Number:	TPS7425
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, Reverse Polarity
Control Features:	Enable
PSRR:	55dB (100Hz)
Current - Supply (Max):	1.5mA
Current - Quiescent (Iq):	115µA
Series:	--
Voltage Dropout (Max):	--
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Voltage - Input (Max):	7V
Number of Regulators:	1
Output Type:	Fixed
Output Configuration:	Positive
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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TPS7425DR Application Field and Working Principle

The TPS7425DR (also referred to as "TPS742") is a low-power linear voltage regulator from Texas Instruments. It is a robust and versatile regulator that offers wide input and output voltage range, low power consumption, low noise, fast transient response, and quickeenable/ disable features. It is widely used in applications including automotive, industrial, medical, and consumer applications. This article will discuss the application field and working principle of the TPS7425DR voltage regulator.

Application Fields

The TPS7425DR is an AEC-Q100 qualified ultra-low noise, low-power linear voltage regulator with a wide input voltage range of 2.5V to 18V and adjustable output voltage range of 0.8V to 5V. It is suitable for a variety of applications, including those that require wide input and output voltage range, low power consumption, and low-noise performance. One of the main applications for the TPS7425DR is in automotive applications. The device is qualified and regulated according to automotive qualification standards (AEC-Q100). It is capable of delivering a stable voltage supply to various in-vehicle systems under varying input voltage conditions, such as engine start-stop, alternator turn-off, and battery aging. The device features an ultra-low dropout voltage of 45mV and a low quiescent current of 80µA, enabling it to provide high power efficiency and low power consumption, an important feature for automotive applications. The TPS7425DR is also suitable for industrial applications. The device features reverse-battery protection, low noise performance, and adjustable output voltage range, which make it ideal for providing regulated voltage supply to various industrial systems. It can be used in a variety of industrial applications, such as industrial communication systems, industrial automation systems, HVAC systems, and lighting systems. In addition, the TPS7425DR can also be used in consumer applications. It is suitable for use in consumer device applications such as portable media players, smartphones, tablets, and other portable consumer electronics. It can also be used in consumer power supplies and battery management systems.

Working Principle

The TPS7425DR is a linear voltage regulator, which means it regulates a voltage source by dissipating excess power as heat. It is designed to maintain a stable output voltage across a wide input voltage range. The device works by using an external reference voltage and a voltage divider to control the output voltage. The regulator is powered by the input voltage, which passes through an input voltage divider circuit to create a reference voltage. This reference voltage is then compared with the output voltage, and a feedback loop adjusts the output voltage to match the reference voltage. The difference between the two voltages is dissipated as heat, regulating the output voltage to the desired level. The TPS7425DR also features reverse battery protection and a quickeenable/ disable feature. The reverse-battery protection prevents damage to the regulator if an input voltage of the wrong polarity is applied. The quickeenable/ disable feature enables the device to be quickly enabled or disabled by connecting or disconnecting a control input pin.

Conclusion

The TPS7425DR is an ultra-low noise, low-power linear voltage regulator from Texas Instruments. It is suitable for a wide range of applications, including automotive, industrial, medical, and consumer. It features wide input and output voltage range, reverse battery protection, fast transient response, low power consumption, and quickeenable/ disable features. The device works by using an external reference voltage and a voltage divider to control the output voltage.

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