Hot-selling and scarce MIC4576WU-TR 200 kHz Simple 3A Buck Regulator TO263-5 spot stock

Product Descriptions

The  MIC4576  is  a  series  of  easy-to-use  fixed  andadjustable  BiCMOS  step-down  (buck)  switch-modevoltage regulators . The 200 kHz MIC4576 duplicatesthe pinout and function of the 52 kHz LM2576 . Thehigher  switching  frequency  may  allow  up  to  a  2:1reduction 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 withexcellent line and load regulation .

The feedback voltage is guaranteed to ±2% tolerancefor  adjustable  versions,  and  the  output  voltage  isguaranteed to ±3% for fixed versions, within specifiedvoltages and load conditions . The oscillator frequencyis guaranteed to ±10%.

In Shutdown mode, the regulator draws less than 200µA   shutdown    current .   The    regulator    performscycle-by-cycle current limiting and thermal shutdownfor protection under fault conditions .

This series of simple switch-mode regulators requiresa minimum number of external components and canoperate   using   a   standard   series   of   inductors .Frequency compensation is provided internally.

The MIC4576 is available in TO-220 (T) and TO-263(U) packages for the industrial temperature range .

Product Features

•  Fixed 200 kHz Operation

•  3.3V, 5V, and Adjustable Output Versions

•  Voltage Over Specified Line and Load Conditions:

-  Fixed version: ±3% maximum output voltage

-  Adjustable version: ±2% maximum 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

•  <200 µA Typical Shutdown Mode

•  75% Efficiency (Adjustable Version > 75% Typical)

•  Standard Inductors are 25% of Typical LM2576 Inductor Values

•  Thermal Shutdown

•  Overcurrent Protection

•  100% Electrical Thermal Limit Burn-In

Product Applications

•  Simple High-Efficiency Step-Down (Buck) Regulator

•  Efficient Preregulator for Linear Regulators

•  On-Card Switching Regulators

•  Positive-to-Negative Converter (Inverting Buck-Boost)

•  Battery Charger

•  Negative Boost Converter

•  Step-Down to 3.3V for Intel Pentium™and Similar Microprocessors

Product Specification

Product Photos

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