LM3281YFQR

Voltage - Output (Min/Fixed):	3.3V
Base Part Number:	LM3281
Supplier Device Package:	6-DSBGA
Package / Case:	6-UFBGA, DSBGA
Mounting Type:	Surface Mount
Operating Temperature:	-30°C ~ 90°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	6MHz
Current - Output:	1.2A
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	3V
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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LM3281YFQR Application Field and Working principle

The LM3281YFQR is a 4th-order DC/DC switching regulator that supports a wide range of switching frequencies and output voltages. The device operates in peak current(CCM) mode over the entire output load range, delivering up to 97% efficiency. This makes it suitable for use in a wide array of applications, from automotive to consumer electronics. It is capable of operating up to 1A with a wide output range of 0.8V to 5.5V.The LM3281YFQR features an integrated voltage detection circuit to monitor the output voltage. This feature is critical for proper system operation and allows the regulator to maintain tight output voltage regulation over the entire output load range. The device also features low start up currents which is especially important in battery powered products. The LM3281YFQR supports multiple topologies, such as buck and boost, and can be configured for either non-isolated or isolated systems. The device has an integrated power MOSFET which is designed to reduce losses and improve switching performance. Additionally, the device supports a wide range of switching frequencies, allowing it to be configured for optimal power efficiency in different applications.The LM3281YFQR is designed to operate in a Pulse-Width Modulation (PWM) mode, where the output voltage is regulated by changing the Duty Cycle of the switching signal. A feedback pin is used to compare the output voltage with the reference voltage and adjust the duty cycle, ensuring regulated voltage over the entire output load range. The LM3281YFQR features a wide set of protection features, including Over Voltage Protection, Under Voltage Lockout, Short Circuit Protection and Over Temperature Protection.To summarize, the LM3281YFQR is a 4th order DC/DC switching regulator that supports a wide range of switching frequencies, output voltages and topologies. It features an integrated voltage detection circuit and low start-up currents, making it suitable for a wide range of applications. The device is designed to operate in a PWM mode for optimal efficiency and has a wide set of protection features for enhanced safety.

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