MIC4576WT Datasheet PDF - Micrel

●The MIC4576WT is an easy-to-use fixed and adjustable BiCMOS step-down (buck) switch-mode Voltage Regulator for use with battery charger. The 200kHz MIC4576 duplicates the pinout and function of the 52kHz LM2576. The higher switching frequency may allow up to a 2:1 reduction in output filter inductor size. It is 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 version, within specified voltages and load conditions. The oscillator frequency is guaranteed to ±10%. In shutdown mode, the regulator draws less than 200µA standby 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.

● Voltage over specified line and load conditions

● Requires minimum external components

● Standard inductors are 25% of typical LM2576 values

● Thermal shutdown

● Overcurrent protection

● 100% electrical thermal limit burn-in

● 75% Efficiency (adjustable version >75% typical)