Datasheet Microchip LM2575-5.0YN

LM2575
52kHz Simple 1A Buck Regulator General Description Features The LM2575 series of monolithic integrated circuits
provide all the active functions for a step-down (buck)
switching regulator. Fixed versions are available with a
3.3V, 5V, 12V, fixed output. Adjustable versions have an
output voltage range from 1.23V to 37V. Both versions are
capable of driving a 1A 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.
A standard series of inductors available from several
different manufacturers are ideal for use with the LM2575
series. This feature greatly simplifies the design of switchmode power supplies.
The feedback voltage is guaranteed to В±2% tolerance for
adjustable versions, and the output voltage is guaranteed
to В±3% for fixed versions, within specified input voltages
and output load conditions. The oscillator frequency is …