LM2673 Adjustable 3A Step-Down Voltage Regulator – Datasheet

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The LM2673 regulator is a monolithic integrated circuit that provides all of the active functions for a step-down (buck) switching regulator capable of driving up to 3A loads with excellent line and load regulation characteristics. High efficiency (>90%) is obtained through the use of a low ON-resistance DMOS power switch. LM2673 consists of fixed output voltages of 3.3V, 5V, and 12V and an adjustable output version.

The simple switcher concept provides for a complete design using a minimum number of external components. A high fixed frequency oscillator (260KHz) allows the use of physically smaller-sized components. A family of standard inductors for use with the LM2673 is available from several manufacturers to greatly simplify the design process.

LM2673 Pinout

LM2673 Pin Configuration

Pin NoPin NameDescription
1SWITCH OUTPUTSwitch Output Pin
2INInput Pin
3C BOOSTCapacitor Boost Pin
4GNDGround Pin
5CURRENT ADJ:Current Adjust Pin
6FBFeedback Pin
7SOFTSTARTSoftStart Pin

LM2673 Key Features

  • Efficiency up to 94%
  • Simple and easy to design with (using off-the-shelf external components)
  • Resistor programmable peak current limit over a range of 2A to 5A.
  • 150 mΩ DMOS output switch
  • 3.3V, 5V and 12V fixed output and adjustable (1.2V to 37V ) versions
  • ±2%maximum output tolerance over full line and load conditions
  • Wide input voltage range: 8V to 40V

Application

  • Simple to design, high efficiency (>90%) step-down switching regulators
  • Efficient system pre-regulator for linear voltage regulators
  • Battery chargers

You can download this datasheet for LM2673 Adjustable 3A Step-Down Voltage Regulator – Datasheet from the link given below: