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Charge Pump

FETS are difficult to operate at low voltages. They may not turn on or off reliably if the gate cannot be biased high enough. Many applications in mobile phones need to operate at only a few volts, right near the lower limit of the FET. To make the load switch work reliably at this low voltage, a charge pump can be added to boost the gate voltage internally to the proper levels.

PTM Published on: 2014-03-21