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pFET Linear Regulator Has Low Dropout Voltage


关键词: P-FET, linear regulator, low dropout, p-channel, MOSFETs, amplifiers, comparator 


P-channel MOSFETs (pFETs), though more expensive than pnp transistors, are free of the dissipation loss associated with base drive in a pnp circuit. pFETs also have a lower saturation voltage at light loads (Figure 1). In fact, the low R_DS(ON), logic-level, p-channel power MOSFETs currently available can regulate 5V from a 5.1V battery!


 pFET Linear Regulator Has Low Dropout Voltage.pdf