LM2678SX-ADJ/NOPB

Series:	SIMPLE SWITCHER®
Packaging:	Tape & Reel (TR)
Part Status:	Active
Function:	Step-Down
Output Configuration:	Positive
Topology:	Buck
Output Type:	Adjustable
Number of Outputs:	1
Voltage - Input (Min):	8V
Voltage - Input (Max):	40V
Voltage - Output (Min/Fixed):	1.21V
Voltage - Output (Max):	37V
Current - Output:	5A
Frequency - Switching:	260kHz
Synchronous Rectifier:	No
Operating Temperature:	-40°C ~ 125°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-263-8, D²Pak (7 Leads + Tab), TO-263CA
Supplier Device Package:	DDPAK/TO-263-7
Base Part Number:	LM2678

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The LM2678SX-ADJ/NOPB is a family of DC-to-DC switching regulators from Texas Instruments. It features a wide 2.5 V to 38 V input voltage range and provides up to 1.5 A of continuous load current. This regulator is designed for applications that require high efficiency, low ripple, and high reliability.The LM2678SX-ADJ/NOPB is a monolithic integrated circuit that can provide a fixed output voltage with adjustable current limiter, over-current and thermal overload protection, and electrical frequency control. It is available in a space-saving 8-Pin NSOIC package.The LM2678SX-ADJ/NOPB is typically used in applications such as on-card and off-board dc-dc power supplies, notebook adapter assemblies, and telecom/datacom power supplies. It is also suitable for switching mode applications in portable electronic devices, such as cellular phones, camcorders, PDAs, and notebooks.The main application for the LM2678SX-ADJ/NOPB is as a dc-dc buck converter regulator. It provides a programmable current limit, thermal protection, and short-circuit protection of the output load. The regulator is able to automatically enter a low-power mode at light load conditions, and can be enabled at a precise ramping rate for soft-start or current-limited startup.The LM2678SX-ADJ/NOPB features a built-in pulse-by-pulse current limiter to protect against short-term output overloading, an adjustable oscillator frequency, and a programmable using PWM control. It also provides dynamic response control that reduces output capacitance and enhances stability over temperature and load variations.The LM2678SX-ADJ/NOPB works with a supply voltage of 2.5 V to 38 V and offers a wide variation of output voltage levels, depending on the external components used. The voltage can be set as low as 0.6 V or as high as the input voltage. The output current can be regulated using an optional sense resistor, as well as by controlling the power switch on/off time.The integrated pulse-by-pulse current limiter on the LM2678SX-ADJ/NOPB makes it ideal for automotive applications, where the voltage and current grades are highly variable. The independent thermal shutdown and over-temperature protection features make this device very reliable in applications that may be exposed to high temperatures.Overall, the LM2678SX-ADJ/NOPB is a great DC-to-DC switching regulator family for a wide variety of applications. It offers high efficiency, low ripple, and high reliability, making it the ideal choice for on-card and off-board dc-dc power supplies, notebook adapter assemblies, and telecom/datacom power supplies. The integrated pulse-by-pulse current limiter and temperature protection features make this ideal for applications that need to be highly reliable and protected against overloads and excessive voltage or current.

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