LM2676 Datasheet | Texas Instruments

Features - New product available: - LMR51430 4.5 to 36-V, 3-A, 500-k Hz and 1.1MHz synchronous converter - For faster time to market: - TLVM13630 3 to 36-V, 3-A, 200-k Hz to 2.2-MHz power module - Efficiency up to 94% - Simple and easy to design with (using off-the-shelf external ponents) - 150-mΩ DMOS output switch - 3.3-V, 5-V, 12-V fixed output and adjustable (1.2 V to 37 V) versions - 50-µA standby current when switched OFF - ±2% maximum output tolerance over full line and load conditions - Wide input voltage range: 8 V to 40 V - 260-k Hz fixed frequency internal oscillator - - 40 to 125°C operating junction temperature range 2 Applications - munication module - Electricity meter - Calling button operating panel - Motor drives 3 Description The LM2676 series of regulators are monolithic integrated circuits which provide all of the active functions for a step-down (buck) switching regulator capable of driving up to 3-A loads with excellent line and load regulation characteristics. High efficiency (> 90%) is obtained through the use of a low ONresistance DMOS power switch. The series consists of fixed output voltages of 3.3 V, 5 V, and 12 V and an adjustable output version. The SIMPLE SWITCHER® power converter concept provides for a plete design using a minimum number of external ponents. A high fixed frequency oscillator (260 k Hz) allows the use of physically smaller sized ponents. A family of standard inductors for use with the LM2676 are available from several manufacturers to greatly simplify the design process. The LM2676 series also has built-in thermal shutdown, current limiting, and an ON and OFF control input that can power down the regulator to a low 50‑µA quiescent current standby condition. The output voltage is ensured to a ±2% tolerance. The clock frequency is controlled to within a ±11% tolerance. Package Information PART NUMBER PACKAGE(1) BODY SIZE (NOM) KTW (TO-263, 7) 10.10 mm × 8.89 mm NDZ (TO-220, 7) 14.986 mm × 10.16 mm NHM...