Published:2011/7/10 10:44:00 Author:Lucas | Keyword: Regulator, DC-DC circuit, power supply monitor, pin | From:SeekIC
MC33129/34129 current mode switching regulator control circuit
It is the current mode switching regulator control circuit. Its output stage is the Totem form. Its supply voltage ranges from 4.2V to 12V. The maximum working frequency is 300 kHz. The maximum Zener current between the VCC terminal and START / RUN OUT side equals to 50mA. Its output current is 1.0A and ambient temperature is 70 ℃. The retention rate for mini package is 552mW. The DIP is 800mW. MC34129 works within 0 ~ +70 ℃. It contains the maximum peak switch current’s soft starting function inside, as well as low input voltage protection’s liver function. Besides, it includes over-current protection circuit with pulse lock function.
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