RT8297BZQW

Voltage - Input (Max):	17V
Supplier Device Package:	8-WDFN (2x2)
Package / Case:	8-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	800kHz
Current - Output:	1.5A
Voltage - Output (Max):	12V
Voltage - Output (Min/Fixed):	0.8V
Series:	--
Voltage - Input (Min):	4V
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

PMIC (Power Management Integrated Circuit) is an important component in a system that is responsible for the control, protection and management of a variety of electrical appliances and circuits. Voltage Regulators are a type of PMICs that regulate input power to ensure higher reliability, efficient utilization and a longer system life. The Regulator can be a linear regulator that draws a constant power, or a DC-DC switching regulator which can deliver a higher current and operate at very high frequency. The RT8297BZQW is a DC-DC switching regulator which can provide up to 3A of output current and operate in the two modes of PWM and PFM. In this article, we will look at the application fields and working principles of the RT8297BZQW.

Application Field

The RT8297BZQW is an integrated Switching Regulator which is suitable for use in applications such as mobile phones, portable computers, power tools, automotive electronics, and home electronics. It can be used to provide a regulated output voltage in the range of 0.8V to 5.5V, with a maximum output current of 3A. Furthermore, the Configurable Sleep/Retention Mode, which enables the device to be put into a low power (sub-microamp) standby mode when the load is not required, makes it ideal for battery-powered applications.

Working Principle

The RT8297BZQW is a Pulse Width Modulation (PWM) and Pulse Frequency Modulation (PFM) switch regulator, which is based on the concept of a buck-boost converter. It is designed to convert an input voltage of 2.5V to 6V, into an output voltage in the range of 0.8V to 5.5V. The main components of the device are its internal power MOSFETs and a feedback control circuit.The device works in two modes - PWM Mode and PFM Mode. In the PWM Mode, the output voltage is regulated by adjusting the duty cycle of the PWM signal. The higher the duty ratio, the higher the output voltage. In PFM Mode, the output voltage is regulated by adjusting the frequency of the PWM signal. The higher the frequency, the higher the output voltage.In addition, the device features a programmable soft start/stop ramp and a programmable current limit. The soft start/stop ramp is used to gradually start and stop the device by gradually increasing/decreasing the duty cycle of the PWM signal when the device starts/stops. The current limit feature is used to limit the current flow from the output and protect the device from over-current events.

Conclusion

The RT8297BZQW is a DC-DC switching regulator which can be used to provide a regulated output voltage in the range of 0.8V to 5.5V, with a maximum output current of 3A. It is suitable for use in applications such as mobile phones, portable computers, power tools, automotive electronics, and home electronics. The device works in two modes - PWM Mode and PFM Mode, and features a programmable soft start/stop ramp and a programmable current limit, making it suitable for battery-powered applications where power saving is essential.

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