LM3671MF-1.8 Integrated Circuits (ICs)

Voltage - Output (Min/Fixed):	1.8V
Base Part Number:	LM3671
Supplier Device Package:	SOT-23-5
Package / Case:	SC-74A, SOT-753
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	2MHz
Current - Output:	600mA
Voltage - Output (Max):	--
Series:	--
Voltage - Input (Max):	5.5V
Voltage - Input (Min):	2.7V
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Part Status:	Obsolete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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LM3671MF-1.8 Application Field and Working PrinciplePMIC (Power Management Integrated Circuit) plays a key role in the efficient implementation of any electronic system by properly allocating power among various sub systems. Voltage regulators provide consistent, regulated and accurate output voltages and current levels to small electronic devices. The increasing demand for portable battery-operated systems has forced the use of higher current, higher voltage regulators with a small footprint and low power dissipation to satisfy the ever-changing requirements.The LM3671MF-1.8 is a DC/DC switching regulator that provides high performance, low quiescent current, and high efficiency. It features a wide input range of 2V to 10V, and an output voltage resolution of 1.8 V. It also incorporates a wide variety of features, such as low signal propagation delay, a light load detect circuit, and a PWM low power feature for minimal power consumption.The LM3671MF-1.8 is a highly integrated regulator that features a low-dropout voltage of 300mV, minimizing current consumption and providing high efficiency to the system. The device is ideal for battery-powered applications, featuring adjustable current-limit protection, internal SoftStart and soft shutdown. The LM3671MF-1.8 also includes a pulse current mode control architecture with input voltage and output current feed forward, as well as output current regulation, which allows for simple, robust circuit design.The wide input voltage range and the low-dropout voltage allow the LM3671MF-1.8 to hold the output in regulation even with large input voltage variations, making it suitable for use with battery-powered systems. The adjustable current-limit protection of the LM3671MF-1.8 allows the IC to protect against overload and over current conditions, thereby ensuring system safety and reliability.The LM3671MF-1.8 includes an internal softStart and soft shutdown, allowing for rapid start-up, reset and shutdown. This enables the user to safely power up and down the system, as well as provide efficient power management through the low quiescent current mode. The pulse current mode control architecture of the LM3671MF-1.8 ensures a constant switching frequency, and the PWM low power mode of the regulator minimizes the power dissipation in stop mode, making it ideal for applications where power consumption is critical.In conclusion, the LM3671MF-1.8 is an ideal choice for cases where a small footprint, high performance, and low quiescent current require an efficient DC/DC switching regulator. The wide input voltage range and adjustable current-limit protection make it ideal for battery-powered applications, while the pulse current-mode control architecture and low dropout voltage ensure accurate voltage regulation and low power dissipation. The device also provides a simple low power PWM feature, enabling low power consumption in shutdown mode.

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