LM2576S-12

TO-263-5 DC-DC Converters ROHS

Features

• 3.3V, 5V, 12V, and Adjustable Output Versions
• Voltage over Specified Line and Load Conditions:
– Fixed Version: ±3% Max. Output Voltage
– Adjustable Version: ±2% Max. Feedback Voltage
• Specified 3A Output Current
• Wide Input Voltage Range of 4V to 40V
• Wide Output Voltage Range of 1.23V to 37V
• Requires Only Four External Components
• 52 kHz Fixed-Frequency Internal Oscillator
• Low Power Standby Mode IQ Typically <200 μA
• 80% Efficiency (Adjustable Version Typically >80%)
• Uses Readily Available Standard Inductors
• Thermal Shutdown and Current Limit Protection
• 100% Electrical Thermal Limit Built-In

Applications

• Simple High-Efficiency Step-Down (Buck) Regulator
• Efficient Pre-Regulator for Linear Regulators
• On-Card Switching Regulators
• Positive and Negative Converter (Inverting Buck-Boost)
• Isolated Flyback Converter using Minimum Number of External Components
• Negative Boost Converter