MIC4576-5BU IC – Step Down Regulator IC

The MIC4576 is a series of easy-to-use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200 kHz MIC4576 duplicates the pinout and function of the 52 kHz 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 200 ?A shutdown current. The regulator performs cycle-by-cycle current limiting and thermal shutdown for protection under fault conditions. This series of simple switch-mode regulators requires a minimum number of external components and can operate 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. 

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 ?A Typical Shutdown Mode 

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

? Standard Inductors are 25% of Typical LM2576 Inductor Values 

? Thermal Shutdown 

? Over current Protection 

? 100% Electrical Thermal Limit Burn-In 

Specification:- 

Related Document:-

 MIC4576 IC Data Sheet