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Manufacturer Part #


MIC4575 Series 24 V 200 kHz 1 A Surface Mount Simple Buck Regulator - TO-263-5

ECAD Model:
Mfr. Name: Microchip
Standard Pkg:
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Product Specification Section
Technical Attributes
Attributes Table
Topology: Buck
Input Voltage: 4V to 24V
Output Current-Max: 1A
Output Type: Adjustable
Switching Frequency-Max: 200kHz
Operating Temp Range: -40°C to +85°C
Duty Cycle-Max: 95%
Efficiency: 77%
No. of Outputs: 1
Storage Temperature Range: -65°C to +150°C
Package Style:  TO-263-5 (D2PAK5)
Mounting Method: Surface Mount
Features & Applications
The MIC4575WU TR 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 1 A 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 6 V to 3.3 V for Intel Pentium® and similar microprocessors
Pricing Section
Global Stock:
On Order:
Factory Stock:Factory Stock:
Factory Lead Time:
16 Weeks
Minimum Order:
Multiple Of:
Web Price
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