LM2676SD-3.3

LM2676 SIMPLE SWITCHER®高效率3A降压型稳压器 LM2676 SIMPLE SWITCHER® High Efficiency 3A Step-Down Voltage Regulator

DESCRIPON

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 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. The series consists of fixed output voltages of 3.3V, 5V and 12V and an adjustable output version.

FEATURES

• Efficiency Up to 94%

• Simple and Easy to Design with Using Off The-Shelf External Components

• 150 mΩ DMOS Output Switch

• 3.3V, 5V and 12V Fixed Output and Adjustable 1.2V to 37V Versions

• 50μA Standby Current When Switched OFF

• ±2% Maximum Output Tolerance Over Full Line and Load Conditions

• Wide Input Voltage Range: 8V to 40V

• 260 KHz Fixed Frequency Internal Oscillator

• −40 to +125°C Operating Junction Temperature Range