The LM2576-5.0WT is a Monolithic Integrated Circuit provide all the active functions for a step-down (buck) switching regulator. Fixed versions are available with a 3.3, 5 or 12V fixed output. Adjustable versions have an output voltage range from 1.23 to 37V. Both versions are capable of driving a 3A load with excellent line and load regulation. These regulators are simple to use because they require a minimum number of external components and include internal frequency compensation and a fixed-frequency oscillator. This series offers a high efficiency replacement for popular three-terminal adjustable linear regulators. It substantially reduces the size of the heat sink and in many cases no heat sink is required. A standard series of inductors available from several different manufacturers are ideal for use with this series. This feature greatly simplifies the design of switch-mode power supplies.
Voltage over specified line and load conditions
±3% Maximum output voltage fixed version
1.23V to 37V Wide output voltage range
Requires only 4 external components
52kHz Fixed frequency internal oscillator
<200μA Low power standby mode IQ typically
80% Efficiency (adjustable version typically > 80%)
(EN)
