RT8009-25GJ5

Voltage - Input (Max):	5.5V
Supplier Device Package:	TSOT-23-5
Package / Case:	SOT-23-5 Thin, TSOT-23-5
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	1.25MHz
Current - Output:	600mA
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	2.5V
Series:	--
Voltage - Input (Min):	2.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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RT8009-25GJ5 Application Field and Working Principle

The RT8009-25GJ5 is a DC-DC Buck Converter belonging to the PMIC Voltage Regulators and DC-DC Switching Regulators category. This device is designed to provide cost effective solutions for portable consumer, industrial and automotive applications, as it is viable in power management, signal chain, and portable power where simplicity, small size and high efficiency are key.This unit works as a step-down converter, making the input voltage ready to be supplied to small-power devices, despite the small size and high efficiency features, which allow it to produce up to 1.4 A of output current with a total of 25 W of power. Its output capability is also adjustable and features an over-temperature and over-current protection mechanism in order to deliver a reliable power supply.

Working Principle and Key Features

RT8009-25GJ5 main working principle relies on the Buck converter and its core circuit, which is based in the internal Buck Converter controller, the high-side and low-side MOSFETs, two Schottky diodes and two capacitors. The internal Buck Controller is mainly responsible for controlling the switching process, as it starts the high-side MOSFET and ends it with the low-side, delivering the output voltage which can range between 0.68 V and 5.5 V, depending on the output accuracy settings of the device.In terms of key features, the RT8009-25GJ5 provides a wide range of power saving, signal chain, and portable power capabilities. It is capable of supplying up to 1.4 A of output current with a total of 25 W of power with an input voltage range from 4.5 V to 20 V. By default, the RT8009-25GJ5 features a built-in PWM frequency of 500 kHz but it is adjustable and can be set up at any frequency between 250 kHz and 1.25 MHz. The output voltage of this device is also adjustable, from 0.68 V to 5.5 V, with a ±5% output voltage accuracy.Efficiency is another feature of the RT8009-25GJ5, as it provides a minimum efficiency of 85% while maintaining a low quiescent current of 41 µA, which allows it to save power when no load is present, or the device is at a lower load. Moreover, this unit also ushers safety and protection mechanisms, as it has over-temperature and over-current protection as well as thermal shutdown and over-voltage protection.

Applications and Installation

The RT8009-25GJ5 is meant to operate under various portable consumer, industrial and automotive applications, such as those related to power management, signal chain, and portable power. This includes the likes of: portable media devices, set top boxes, data center IT equipment, monitors and displays, automotive infotainment systems, LCD back lighting, and gaming consoles. Its wide range of features, such as adjustable frequency, adjustable output voltage and low quiescent current make it ideal for those purposes.Regarding installation, the RT8009-25GJ5 comes in an SOP8 package and is fairly easy to mount. All that is needed is to connect the output port of the RT8009-25GJ5 to the output capacitor, connect the input port to the input capacitor and then connect the input and output filter network.

Conclusion

In conclusion, the RT8009-25GJ5 is a DC-DC Buck Converter designed with simplicity, small size, and high efficiency in mind, belonging to the PMIC Voltage Regulators and DC-DC Switching Regulators category. This device is ideal for power management, signal chain, and portable power applications, such as those related to portable media devices, set top boxes, data center IT equipment, monitors and displays, automotive infotainment systems, LCD back lighting, and gaming consoles. Its primary features are adjustable frequency, adjustable output voltage and low quiescent current. Plus, it is designed with safety and protection mechanisms, such as over-temperature and over-current protection, thermal shutdown and over-voltage protection. Regarding installation, it is easy and straightforward, only requiring the connection of the output port of the RT8009-25GJ5 to the output capacitor, connecting the input port to the input capacitor and then connecting the input and output filter network.

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