Positive And Negative Voltage Switching Supply

  
An LT1172 generates positive and negative voltages from a 5-V input. The LT1172 is configure
Positive And Negative Voltage Switching Supply - schematic

d as a step-up converter. To generate the negative output, a charge pump is used. C2 is charged by the inductor when D2 is forward-biased and discharges into C4 when LT1172"s power switch pulls the positive side of C2 to ground.



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