器件名称:
MIC4574-3.3BN
功能描述:
200kHz Simple 0.5A Buck Voltage Regulator
文件大小:
93.76KB 共6页
简 介:
MIC4574 Micrel MIC4574 200kHz Simple 0.5A Buck Voltage Regulator General Description The MIC4574 is a series of easy to use fixed and adjustable BiCMOS step-down (buck) switch-mode voltage regulators. The 200kHz MIC4574 duplicates the pinout and function of the 52kHz LM2574. The higher switching frequency may allow up to a 2:1 reduction in output filter inductor size. The MIC4574 is available in 3.3V, and 5V fixed output versions or a 1.23V to 20V adjustable output version. Both versions are capable of driving a 0.5A 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 200A 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. The MIC4574 is available in DIP (N) and SOIC (WM) packages for the industrial temperature range. Features Fixed 200kHz operation 3.3V, 5V, and adjustable output versions Voltage over specified line and load conditions: Fixed version: ±3% max. output voltage Adjustable version: ± 2% max. feedback voltage ……
