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Product Variant Information section
Product Specification Section
Pricing Section

Stock: 344

On Order: 0
Factory Stock:Factory Stock: 400
Factory Lead Time: 14 Weeks
Minimum Order: 1
Multiple Of: 1
Quantity Web Price
1 $3.01
26 $2.51
100+ $2.28


Attributes Table
Topology Buck
Input Voltage 4V to 24V
Output Current-Max 1A
Output Type Fixed
Switching Frequency-Max 200kHz
Operating Temp Range -40°C to +85°C
Duty Cycle-Max 95%
Efficiency 77%
No. of Outputs 1
Quiescent Current 10mA
Storage Temperature Range -65°C to +150°C
Features and Applications

The MIC4575-5.0WU is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200 kHz MIC4575 duplicates the pinout and function of the 52 kHz LM2575. The higher switching frequency may allow up to a 2:1 reduction in output filter inductor size.

The MIC4575 is available in 3.3 V, and 5 V fixed output versions or a 1.23 V to 20 V adjustable output version. Both versions are capable of driving a 1A load with excellent line and load regulation.


  • Fixed 200 kHz operation
  • 3.3 V, 5 V, and adjustable output versions
  • Voltage over specified line and load conditions:
  • Fixed version: ±3% max. output voltage
  • Adjustable version: ±2% max. feedback voltage
  • Guaranteed 1 A switch current
  • Wide 4 V to 24 V input voltage range
  • Wide 1.23 V to 20 V output voltage range
  • Requires minimum external components
  • < 200 μA typical shutdown mode
  • 75% efficiency (adjustable version > 75% typical)
  • Standard inductors and capacitors are25% of typical LM2575 values
  • Thermal shutdown
  • Overcurrent protection
  • 100% electrical thermal limit burn-in


  • Simple high-efficiency step-down (buck) regulator
  • Efficient pre-regulator for linear regulators
  • On-card switching regulators
  • Positive-to-negative converter (inverting buck-boost)
  • Battery charger
  • Negative boost converter
  • Step-down 6V to 3.3 V for Intel Pentium® and similar microprocessors