Microchip | LM2575-5.0WT

The LM2575-5.0WT is of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator. Fixed versions are available with a 3.3 V, 5 V, 12 V, or 15 V fixed output. Adjustable versions have an output voltage range from 1.23 V to 37 V. Both versions are capable of driving a 1 A 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.
The LM2575 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.

Features:

• 3.3 V, 5 V, 12 V, 15 V, and adjustable output versions 
• Fixed version: ±3% max. output voltage
• Adjustable version: ±2% max. feedback voltage
• Guaranteed 1 A output current
• Wide input voltage range:
• Wide output voltage range 
• Requires only 4 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 burn-in

Applications:

• Simple high-efficiency step-down (buck) regulator Efficient pre-regulator for linear regulators
• On-card switching regulators
• Positive to negative converter (inverting Buck-Boost)
• Isolated Flyback Converter using minimum number of external components
• Negative Boost Converter

To learn more about LM2575 product family, Click Here