MIC4576

Fixed 200kHz operation
3.3V, 5V, and adjustable output versions
Voltage over specified line and load conditions:
Fixed version: ±3% max. output voltage
Adjustable version: ±2% max. feedback voltage
Guaranteed 3A switch current
Wide 4V to 36V input voltage range
Wide 1.23V to 33V output voltage range
Requires minimum external components
< 200mA typical shutdown mode
75% efficiency (adjustable version > 75% typical)
Standard inductors are 25% of typical LM2576 values
Thermal shutdown
Overcurrent protection
100% electrical thermal limit burn-in

TheMIC4576 isaseries ofeasyto use fixed and adjustableBiCMOS step-down (buck) switch-modevoltageregulators.The 200kHz MIC4576 duplicates the pinout and function ofthe 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 outputversions or a 1.23V to 33V adjustable output version. Both versions are capable of driving a 3A load with excellent lineand load regulation.
The feedback voltage of MIC4576 is guaranteed to ±2% tolerance foradjustable versions, and the output voltage is guaranteed to±3% for fixed versions, within specified voltages and loadconditions. The oscillator frequency is guaranteed to ±10%.In shutdown mode, the regulator draws less than 200mAstandby current. The regulator performs cycle-by-cyclecurrent limiting and thermal shutdown for protection underfault conditions.
This series of simple switch-mode regulators requires aminimum number of external components and can operateusing a standard series of inductors. Frequency compensationis provided internally.
The MIC4576 is available in TO-220 (T) and TO-263 (U)packages for the industrial temperature range.