RT6242BHGQUF

Voltage - Input (Max):	18V
Supplier Device Package:	16-UQFN (3x3)
Package / Case:	16-UFQFN
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	300kHz ~ 700kHz
Current - Output:	12A
Voltage - Output (Max):	8V
Voltage - Output (Min/Fixed):	0.7V
Series:	ACOT™
Voltage - Input (Min):	4.5V
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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RT6242BHGQUF Application Field and Working Principle
RT6242BHGQUF is a dual step-down DC-DC switching regulator for battery-powered applications. It is an easy-to-use DC-DC converter. It is available in a number of package options, and provides great flexibility in system design. It is ideal for providing power to low-voltage and battery-powered applications such as portable media players, PDAs, notebooks and netbooks, wireless modems and streaming media devices.
Working Principle
The RT6242BHGQUF is a dual-channel buck DC/DC converter with an internal switch. It is designed to step down the battery voltage to power the low voltage loads. It operates as a synchronous buck regulator with its two MOSFETs switching in synchronism with the PWM frequency. One MOSFET is used to regulate the input voltage from the battery and the other MOSFET is used to regulate the output voltage to the load. When operating in this mode, the internal MOSFETs alternately switch on and off to provide the conversion of the input voltage to the regulated output voltage.
The RT6242BHGQUF has a voltage feedback regulator with two adjustable output voltage levels. The output voltage can be adjusted from 0.95V~3.3V. The RT6242BHGQUF also integrates an operational amplifier to control the current flow and reduce the power dissipation of the device. The device also provides over-current protection and a power OK signal to signal the system that the output voltage is within the specified range. It also provides an output short-circuit protection and a thermal protection in case the device is working at higher temperatures.
RT6242BHGQUF Features
The RT6242BHGQUF features a wide input voltage range from 4.2V~10V, adjustable switching frequency from 500kHz~2.2MHz, adjustable output voltage from 0.95V~3.3V and a maximum output current of 2.7A. The device has a wide operating temperature range from -20 °C~85 °C. It is available in an ultra-small QFN (6mm x6mm) package which reduces the circuit board space requirement.
Conclusion
The RT6242BHGQUF is a dual step-down DC-DC switching regulator which is designed for battery-powered applications. It provides an adjustable output voltage from 0.95V to 3.3V and a maximum output current of 2.7A. Its wide input voltage range from 4.2V~10V make it suitable for a variety of applications. The wide operating temperature range from -20° C to 85° C and ultra-small QFN package make it an attractive solution for space-constrained and temperature-sensitive applications.

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