LM2674MX-5.0/NOPB

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 500-mA load current with excellent line and
load regulation. These devices are available in fixed
output voltages of 3.3 V, 5 V, 12 V, 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 260 kHz, 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 printedcircuit 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.


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    SPECIFICATION

    • New product available:
    – LMR36506 3 to 65-V, 0.6-A, 200-kHz to 2.2-
    MHz synchronous converter
    • For faster time to market:
    – TPSM365R6 3 to 65-V, 0.6-A, 200-kHz to 2.2-
    MHz power module
    • 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
    • 3-V, 5-V, 12-V, and adjustable output versions
    • 1.21-V to 37-V adjustable version output voltage
    range
    • ±1.5% maximum output voltage tolerance over line
    and load conditions
    • Ensured 500-mA output load current
    • 0.25-Ω DMOS output switch
    • 8-V to 40-V wide input voltage range
    • 260-kHz 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