LM3679UR-1.5/NOPB

Voltage - Output (Min/Fixed):	1.5V
Base Part Number:	LM3679
Supplier Device Package:	5-DSBGA (1.47x1.02)
Package / Case:	5-XFBGA
Mounting Type:	Surface Mount
Operating Temperature:	-30°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	3MHz
Current - Output:	350mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.5V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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IntroductionThe LM3679UR-1.5/NOPB is a PMIC (Power Management Integrated Circuit) belonging to the Voltage Regulators category and its formal name is DC DC Switching Regulators. As its name implies, it functions to regulate voltage by switching DC power sources. It is a highly integrated device with advanced features that helps simplify designs and reduce board space. The LM3679UR-1.5/NOPBis a highly-integrated, highly configurable and efficient buck converter. It is capable of operating with up to 80V input voltage, while its maximum output current is 12A. It has an adjustable switching frequency from 300kHz to 2.2MHz, and an adjustable protection threshold from 0.8V to 5.5V. Additionally, it has two programmable internal voltage reference options (2.5V and 1.2V) and both differential and remote sense amplifiers that enable precise voltage regulation.Application FieldThe LM3679UR-1.5/NOPB is widely used in radio frequency and precision applications and is designed for automotive and medical end-products as well. It is also suitable for applications in PCs, notebooks, netbooks, servers and other high performance applications. In automotive applications, the LM3679UR-1.5/NOPB can be used to design a reliable, eco-friendly and low-cost voltage regulator. As the automotive industry is always looking to reduce weight and cost while improving the performance of their products, the LM3679UR-1.5/NOPB is an ideal choice. It is more efficient, features more precise voltage regulation and has wider input voltage range compared to other converters in its category.In medical applications, it offers precise voltage regulation as well as advanced protection features like over/under voltage protection and short circuit protection. This makes it suitable for powering medical equipment and ensuring reliable operation.Working PrincipleThe LM3679UR-1.5/NOPB is a pulse-width modulation (PWM) switched-mode buck regulator. It works by switching power from the input source (battery, solar cell, etc.) to the load in a pulse-width modulation scheme, which enables it to precisely adjust the output voltage in a wide range based on the input voltage. It is equipped with an internal voltage reference that is used to generate the switching signal. The signal is generated by comparing the internal reference voltage with the output voltage signal. When the two voltages match, the D-CMOS logic generates the ON signal that is used to switch the mosfet. When the two voltages don’t match, the OFF signal is generated and the power supply is shut down.ConclusionThe LM3679UR-1.5/NOPB is a highly integrated and configurable DC DC Switching Regulator PMIC, designed for radio frequency, precision and automotive applications. It is designed to be highly efficient, reliable and cost-effective, making it the ideal choice for high performance, eco-friendly and low-cost designs. It works using the pulse-width modulation principle, enabling it to precisely adjust the output voltage in a wide range based on the input voltage.

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