Reverse phase output four times voltage DC/DC voltage stabilization power supply circuit without inductance

Published:2011/6/21 22:02:00 Author:TaoXi | Keyword: Reverse phase, output, four times, voltage, DC/DC, voltage stabilization, power supply, inductance | From:SeekIC

The reverse phase output four times voltage DC/DC voltage stabilization power supply circuit which is composed of the MAX868 and CMPSH-3S is as shown in the figure. The MAX868 is designed as the voltage stabilization type reverse phase charge pump integrated circuit that produces the -2VIN output voltage, the input voltage range of the VIN is 1.8～5.5V. The IC1 adjusts the output voltage through the pulse frequency modulation (PFM), the maximum frequency is 450kHz. The quiescent current is very low (30μA). We can form a reverse phase four times voltage power supply circuit by adding the charge pump which is composed of the C3, C4 and the schottky diode to the feedback loop.



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