RT8202AGQW

Voltage - Supply (Vcc/Vdd):	4.5 V ~ 5.5 V
Supplier Device Package:	16-WQFN (3x3)
Package / Case:	16-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 85°C (TA)
Control Features:	Current Limit, Enable, On Time Control, Phase Control, Power Good
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Frequency - Switching:	--
Series:	--
Output Phases:	1
Number of Outputs:	1
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

The RT8202AGQW is a DC-DC switching controller designed to provide a cost-effective alternative for any power supply system that uses a DC-DC converter. This device features an integrated power switch and internal op amp to provide a complete solution for DC-DC conversion and step-down voltage regulation.

Application Field of RT8202AGQW

The application field of RT8202AGQW covers multiple areas, from small embedded systems to high-end power system applications. As an advanced DC-DC converter, it can be used for both voltage step-down and step-up applications. It can be used in power management and automotive applications, such as in car audio systems, battery charging, and voltage regulation. It can also be used in computer peripheral devices, such as printers and monitors, as well as in consumer electronic products, such as in mobile phones, MP3 players and PDA’s.

Features of RT8202AGQW

The RT8202AGQW has several integrated features to increase system efficiency and reduce external components. It has a 100V/µs (max) high side and low side switch slew rate, an adjustable soft start, multiple output voltage choices (1.2 V - 0.9 V) and pre-programmed maximum duty cycle. It also has an adjustable operating frequency (50 kHz - 400 kHz) and a low voltage current sense resistor for accurate current measurement and control. Furthermore, the RT8202AGQW features an internal power switch, low RDS-on (On resistance) and integrated over current protection.

Working Principle

The working principle of RT8202AGQW is highly regulated and efficient. The device follows a pulse width modulation (PWM) technique to create a switching output from the integrated power switch. The operating frequency of the device is adjustable and varies from 50 kHz to 400 kHz.During power conversion, the power switch is controlled by the RT8202AGQW logic, which regulates the ON-time of the switch to maintain the output voltage at its desired set-point. The output voltage is monitored through the internal voltage divider and feedback to the RT8202AGQW’s control system. The operating time of the power switch is regulated and monitored by the RT8202AGQW logic. The duration of the ON-time is adjusted based on the load conditions and varies inversely with the load current.

Conclusion

The RT8202AGQW is a cost-effective DC-DC switching controller that provides a comprehensive solution for DC-DC conversion and step-down voltage regulation in multiple applications. Its integrated power switch and internal op amp minimise the need for external components. The PWM technique allows for efficient conversion with adjustable frequency and maximum duty cycle. This device is a great choice for power management and automotive applications, as well as in consumer electronic products.

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