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POSITIVE_AND_NEGATIVE_VOLTAGE_SWITCHING_SUPPLY

2015-03-18 22:43  
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POSITIVE_AND_NEGATIVE_VOLTAGE_SWITCHING_SUPPLY
The LT1172 is configured as a step-up converter. C2 is charged by L1 and discharges into C4 when the LT1172's power switch goes to ground. Resistor R3 adjusts the output voltage between -12 and -24 V.