LM3679TLX-1.8/NOPB

Voltage - Output (Min/Fixed):	1.8V
Base Part Number:	LM3679
Supplier Device Package:	5-DSBGA (1.41x1.08)
Package / Case:	5-WFBGA, DSBGA
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Part Status:	Obsolete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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Introduction

The LM3679TLX-1.8/NOPB is a high efficiency, versatile switching regulator available in a wide range of voltage regulators. It is a 3-pin Non-isolated, Step-Up DC-DC Converter, capable of delivering 1.8V regulated output. The LM3679TLX-1.8/NOPB application field includes mainly switching regulators, portable systems, and communication equipment.

Features

The LM3679TLX-1.8/NOPB features a wide input voltage range of 4.5V to 42V, with a 1.8V output. It has an efficiency of up to 95% through the switching process, with a 3A peak current capability. It has a very low quiescent current of 6µA, which is suitable for applications that require low power consumption. The built-in output current limit and thermal shutdown protection make it more suitable for temperature sensitive applications.

Applications

The LM3679TLX-1.8/NOPB can be used in a variety of applications, such as DC-DC converters, battery-powered devices, telecom systems, industrial robots and consumer electronics. It powered products such as personal computers, hand-held devices or low-power communication equipment. It\'s also used in applications that need low output voltage and low power consumption, such as consumer and portable systems.

Working Principle

The LM3679TLX-1.8/NOPB uses Pulse Frequency Modulation (PFM) to convert input voltage to the desired output voltage. It operates as a voltage-mode control converter using a low-side MOSFET switch. It utilizes an adaptive on-time control scheme in which the duty cycle of the MOSFET is optimized with each switch cycle. It has a fixed frequency of 1.5MHz which helps to reduce the output impedance and EMI.The LM3679TLX-1.8/NOPB provides efficient and quick conversion of input voltage to the desired output voltage, with a peak efficiency of 95%. It has an extremely low quiescent current of 6µA and also includes current limit protection and thermal shutdown protection. This makes it suitable for applications that are temperature-sensitive.

Conclusion

The LM3679TLX-1.8/NOPB is a high-efficiency, versatile switching regulator available in a wide range of voltage regulators for many applications. It offers the user an input voltage range of 4.5V to 42V and an output voltage of 1.8V with a peak efficiency of 95%. It has a very low quiescent current of 6µA, and also includes current limit protection and thermal shutdown protection for more reliable operation. The LM3679TLX-1.8/NOPB is suitable for applications that require low output voltage, low power consumption and temperature sensitive systems.

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