RT8073GSP

Voltage - Input (Max):	5.5V
Supplier Device Package:	8-SOP-EP
Package / Case:	8-SOIC (0.154", 3.90mm Width) Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	300kHz ~ 2MHz
Current - Output:	6A
Voltage - Output (Max):	3.3V
Voltage - Output (Min/Fixed):	0.8V
Series:	--
Voltage - Input (Min):	2.9V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

RT8073GSP is a series of DC DC switching regulator controllers provided by Richtek, which is capable of providing high power output (up to 5A) with low battery voltage (up to 10V). It is designed to deliver step-down voltage outputs with a wide input voltage range. It is suitable for applications such as motor control, module power, and automotive electronics.

Application Field

RT8073GSP is applicable for low-voltage cooling and heating systems, fan motor controllers, portable battery powered systems, and many other high-current automotive applications. It is ideal for applications which require quick dynamic response, fast transient response and precise output voltage.

Features

RT8073GSP features a low quiescent current (6uA @ 3V/5V input), an adjustable output voltage range (1.2V-8.2V) and an integrated tuning circuit to improve the dynamic response. It also has an integrated synchronous rectification to reduce the power consumption. Additionally, it has overcurrent protection, overvoltage protection and overheat protection.

Working Principle

RT8073GSP is based on Field Effect Transistor (FET) switching regulated voltage controllers. This design involves a feedback loop, which includes an on-chip voltage reference and error amplifier, to provide precise output voltage regulation. The reference voltage is compared with the voltage at the output and the difference is used to adjust the duty cycle of the switch. The switch is usually a FET which is connected to the output capacitor which filters the output voltage and adjusts it to the desired value.The RT8073GSP also features a frequency control for pulsed output voltage. The frequency is controlled by an on-chip oscillator, and is adjustable depending on the application. The output voltage is also adjustable by the on-chip tuning circuit which helps to improve the dynamic response.

Conclusion

RT8073GSP is a high-power DC-DC switching regulator controller from Richtek. It is suitable for applications such as motor control, module power, and automotive electronics. It features a low quiescent current, an adjustable output voltage range and an integrated tuning circuit to improve the dynamic response and fast transient response. The principle of operation is based on Field Effect Transistor (FET) switching regulated voltage controllers. It is an ideal solution for applications which require quick dynamic response, fast transient response and precise output voltage regulation.

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