LM2674LD-ADJ/NOPB

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LM2674LD-ADJ/NOPB

SIMPLE SWITCHER® 40V, 500mA Low Component Count Step-Down Regulator

Packaging

Package | PIN: NHN | 16
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $2.89
10-24 $2.60
25-99 $2.42
100-249 $2.12
250-499 $1.99
500-749 $1.69
750-999 $1.43
1000+ $1.20

Features

  • Efficiency up to 96%
  • Available in 8-Pin SOIC, PDIP, and 16-Pin WSON
    Packages
  • Simple and Easy to Design With
  • Requires Only 5 External Components
  • Uses Readily Available Standard Inductors
  • 3-V, 5-V, 12-V, and Adjustable Output Versions
  • Adjustable Version Output Voltage Range: 1.21 V
    to 37 V
  • ±1.5% Maximum Output Voltage Tolerance Over
    Line and Load Conditions
  • Ensured 500-mA Output Load Current
  • 0.25-Ω DMOS Output Switch
  • Wide Input Voltage Range: 8 V to 40 V
  • 260-kHz Fixed Frequency Internal Oscillator
  • TTL Shutdown Capability, Low Power Standby
    Mode
  • Thermal Shutdown and Current Limit Protection

Texas Instruments  LM2674LD-ADJ/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 its 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 an ensured ±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 50-µA standby current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions.