MIC4576
Micrel, Inc.
MIC4576
200kHz Simple 3A Buck Regulator
General Description
The MIC4576 is a series of easy to us...
MIC4576
Micrel, Inc.
MIC4576
200kHz Simple 3A Buck Regulator
General Description
The MIC4576 is a series of easy to use fixed and adjustable Bi
CMOS step-down (buck) switch-mode
voltage regulators. The 200kHz MIC4576 duplicates the pinout and function of the 52kHz LM2576. The higher switching frequency may allow up to a 2:1 reduction in output filter inductor size.
The MIC4576 is available in 3.3V, and 5V fixed output versions or a 1.23V to 33V adjustable output version. Both versions are capable of driving a 3A load with excellent line and load regulation.
The feedback
voltage is guaranteed to ±2% tolerance for adjustable versions, and the output
voltage is guaranteed to ±3% for fixed versions, within specified
voltages and load conditions. The oscillator frequency is guaranteed to ±10%.
In shutdown mode, the regulator draws less than 200µA standby current. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault conditions.
This...