Voltage - Output (Min/Fixed):	3.3V
Base Part Number:	LM2679
Supplier Device Package:	14-VSON (5x6)
Package / Case:	14-VDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	260kHz
Current - Output:	5A
Voltage - Output (Max):	--
Series:	SIMPLE SWITCHER®
Voltage - Input (Max):	40V
Voltage - Input (Min):	8V
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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Introduction

The LM2679SD-3.3/NOPB is adc-dc switching regulator developed by Texas Instruments. This device is a member of the LM2679 family of voltage regulators, which provides a single output of 3.3V at up to 340mA. It is a low dropout voltage regulator intended for use in applications that require a low output voltages and low noise operation. The device features a low operating current of 3.3µA and a wide input voltage range of 2.5V to 42V. The LM2679SD-3.3/NOPB is ideal for applications requiring small footprint, low quiescent current and noise-sensitive applications.

Application Field and Working Principle

The LM2679SD-3.3/NOPB can be used in a wide variety of applications where its combination of low dropout voltage, low operating current and wide input voltage range make it a perfect choice. It is particularly well suited for use in low power applications in the industrial, communications, and medical markets, where its low noise output is a major benefit. It can also be used to power circuit boards or sensitive analog circuitry in high voltage environments, such as automotive or telecom application.In operation, the LM2679SD-3.3/NOPB incorporates a low dropout voltage reference, internal thermal limit protection, as well as current limit and inverse current protection circuitry. The device allows up to a 90% efficiency, while maintaining a wide input range of 2.5V to 42V and a low output voltage of 3.3V. It is capable of operating within a temperature range of -40°C to 125°C, while delivering up to 340mA of current. Additionally, the device supports a wide range of output frequencies, which can be adjusted depending on the application.

Conclusion

The LM2679SD-3.3/NOPB is an ideal voltage regulator for applications that require small footprint, low quiescent current, and noise-sensitive requirements. The device is designed to provide a single output of 3.3V at up to 340mA with a low dropout voltage. It is designed with built-in thermal limit protection, current limit, and inverse current protections. Additionally, the device has a wide operating temperature range and adjustable operating frequency for use in various applications.

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