MIC4576WU

MICREL SEMICONDUCTOR  MIC4576WU  直流-直流开关降压稳压器, 可调, 4V-36V输入, 1.23V-33V输出, 3A输出, TO-263-5

The 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