LM2675LD-5.0/NOPB

Voltage - Output (Min/Fixed):	5V
Base Part Number:	LM2675
Supplier Device Package:	16-WSON (5x5)
Package / Case:	16-WFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 125°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	260kHz
Current - Output:	1A
Voltage - Output (Max):	--
Series:	SIMPLE SWITCHER®
Voltage - Input (Max):	40V
Voltage - Input (Min):	6.5V
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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LM2675LD-5.0/NOPB Application Field and Working Principle

The LM2675LD-5.0/NOPB is a DC-DC switch regulator and is part of the LM2675 Simpler Switcher family from Texas Instruments. Designed for cost sensitive consumer and portable applications, the LM2675LD-5.0/NOPB is a multi-feature device designed for a wide range of step-up and step-down switching regulator applications. Its features include a wide adjustable output voltage range which eliminates the extra cost of using multiple voltage regulator ICs, a wide input range that allows operation from a single to three cell battery and achieves efficiencies of over 90%, and programmable current limit and frequency. These capabilities make the LM2675LD-5.0/NOPB a perfect choice for both step-up and step-down voltage regulator applications.

Input Voltage And Output Voltage

The LM2675LD-5.0/NOPB is suitable for use with a range of input voltage sources, such as AC-to-DC adapters, battery-backed systems, and automotive, wall mounted, or other suitable sources. The input voltage range for the device is 3.5V to 20V, allowing for operation from a single to three cell battery. The LM2675LD-5.0/NOPB has a wide regulated output voltage of 5.0V with an accuracy of ±5%.

Internal Protection

The LM2675LD-5.0/NOPB has built-in thermal shutdown and over-voltage protection. The device also includes a programmable current limit protection circuit. The current limit circuit is programmable, either by connecting external resistors or by using an on-board jumper. The current limit can be set to a maximum of 2A. In addition, the device offers an adjustable current-limit hysteresis level which can be set using external resistors.

Features

The LM2675LD-5.0/NOPB has many features to support a wide range of voltage regulator applications. It has a wide adjustable output voltage range which eliminates the extra cost of using multiple voltage regulator ICs. The device has a wide input voltage range, allowing operation from a single to three cell battery. The device achieves efficiencies of over 90%, and has programmable current limit and frequency. Other features include low-noise operation, adjustable current-limit hysteresis, thermal shutdown, over voltage protection, and short circuit protection.

Application

The LM2675LD-5.0/NOPB is suitable for use in a variety of voltage regulator applications such as automotive applications, field-powered applications, battery-backup systems, and portable communication and consumer electronics. It is also well-suited for various portable and home appliances such as white goods, air conditioners, and medical applications.

Working Principle

The LM2675LD-5.0/NOPB converts the input voltage to a regulated output voltage using the voltage regulator principle. The device operates in either step-up or step-down mode depending on the input voltage and output voltage. In the step-up mode, the device boosts the input voltage to the desired output voltage. In the step-down mode, the device reduces the input voltage to the required output voltage. The device uses an internal high-efficiency switching converter to convert the input voltage. The switching converter consists of an oscillator, a turn-ON Circuit, an output switch, and a control circuit. The oscillator generates an oscillating signal and the turn-ON circuit turns ON the output switch when the oscillator signal reaches a certain level. The control circuit then monitors the output voltage and turns the output switch OFF when the voltage reaches the desired level, thus regulating the output voltage.

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