National Semiconductor LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit Datasheet

The LM2673 is a 3A step-down switching regulator from Texas Instruments with a maximum output current of 3A and high efficiency.

Brand: National Semiconductor
Category: DC/DC Converters
Document type: Datasheet
Language: English
Pages: 26
File format: PDF
File size: 432 KB
Published: 07 June, 2012
Updated: 30 September, 2023
Model: LM2673
MD5 checksum: 1DAEFCC531A457C7BBA8C4229AD041E5
PDF: National Semiconductor LM2673 SIMPLE SWITCHER 3A Step-Down Voltage Regulator with Adjustable Current Limit Datasheet PDF

About this manual

The LM2673 is a monolithic integrated circuit providing a step-down (buck) switching regulator capable of driving up to 3A loads with high efficiency (>90%). It features a fixed frequency oscillator (260KHz), softstart capability, and built-in thermal shutdown. Available in fixed output versions (3.3V, 5V, 12V) and an adjustable version (1.2V to 37V). The device is designed for easy integration using off-the-shelf components and supports a wide input voltage range (8V to 40V).

What's inside

General Description
Features
Applications
Typical Application
Connection Diagrams and Ordering Information
Absolute Maximum Ratings
Electrical Characteristics
Typical Performance Characteristics

Specifications

Output Voltage	3.3V, 5V, 12V fixed or adjustable (1.2V to 37V)
Efficiency	Up to 94%
Input Voltage Range	8V to 40V
Oscillator Frequency	260 KHz
Current Limit	Resistor programmable peak current limit (2A to 5A)
Output Voltage Tolerance	+2%
Operating Temperature Range	-40°C to +125°C

Frequently asked questions

What is the maximum efficiency of the LM2673?

Efficiency up to 94%.

What is the input voltage range for the LM2673?

8V to 40V.

What output voltage versions are available?

3.3V, 5V, 12V fixed or adjustable (1.2V to 37V).

What is the operating temperature range?

—40°C to +125°C.

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