Microchip (LM2576-5.0WT) Buck (Step Down) Switching Regulator

Buck (Step Down) Switching Regulator, Fixed, 4 V to 40 V in, 5 V/3 A out, 52 kHz, TO-220-5 Product Overview 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%) Uses readily available standard inductors Thermal shutdown and current limit protection 100% Electrical thermal limit burn-in Applications Signal Processing Product Information Topology: Buck (Step Down) Input Voltage Min: 4V Input Voltage Max: 40V DC / DC Converter IC Case: TO-220 No. of Pins: 5Pins Output Current: 3A Output Voltage Nom: 5V Switching Frequency: 52kHz Operating Temperature Max: 85°C