LM2575
Description
The LM2575 series of monolithic integrated circuits provide all the active functions for a step-down (buck) switching regulator.
Key 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
- Guaranteed 1A output current
- Wide input voltage range: 4V to 40V
- Wide output voltage range 1.23V to 37V
- 52kHz fixed frequency internal oscillator
- Low power standby mode IQ typically < 200µA
- 80% efficiency (adjustable version typically > 80%)
- Uses readily available standard inductors
- Thermal shutdown and current limit protection
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 ponents
