Packaging information
| Package | Pins SOIC (D) | 8 |
| Operating temperature range (°C) -40 to 125 |
| Package qty | Carrier 2,500 | LARGE T&R |
Features for the LM2674
- New product available:
- For faster time to market:
- Efficiency up to 96%
- Available in 8-pin SOIC, PDIP, and 16-pin WSON packages
- Simple and easy to design with
- Requires only five external components
- Uses readily available standard inductors
- 3V, 5V, 12V, and adjustable output versions
- 1.21V to 37V adjustable version output voltage range
- ±1.5% maximum output voltage tolerance over line and load conditions
- Specified 500mA output load current
- 0.25Ω DMOS output switch
- 8V to 40V wide input voltage range
- 260kHz fixed frequency internal oscillator
- TTL shutdown capability, low power standby mode
- Thermal shutdown and current limit protection
- Create a custom design using the LM2674 with the WEBENCH® Power Designer
Description for the LM2674
The LM2674 series of regulators are monolithic integrated circuits built with a LMDMOS process. These regulators provide all the active functions for a step-down (buck) switching regulator, capable of driving a 500mA load current with excellent line and load regulation. These devices are available in fixed output voltages of 3.3V, 5V, 12V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation and a fixed frequency oscillator.
The LM2674 series operates at a switching frequency of 260kHz, thus allowing smaller sized filter components than what is required with lower frequency switching regulators. Because of very high efficiency (> 90%), the copper traces on the printed-circuit board are the only heat sinking required.
A family of standard inductors for use with the LM2674 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies using these advanced ICs. Also included in the data sheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies.
Other features include a specified ±1.5% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring typically 50µA standby current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.