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 No | Pin Name | Description |
|---|---|---|
| 1 | SWITCH OUTPUT | Switch Output Pin |
| 2 | IN | Input Pin |
| 3 | C BOOST | Capacitor Boost Pin |
| 4 | GND | Ground Pin |
| 5 | CURRENT ADJ: | Current Adjust Pin |
| 6 | FB | Feedback Pin |
| 7 | SOFTSTART | SoftStart 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:
