线性稳压器：工作原理极其补偿 ǖ ǖ 1148 Chester Simpson 20005 āā LM340LM317 NPN 1 NPN LDO LDO quasi- LDO OQO! 10123902 āāNPNPNPNPN 2. PNP LDO 1.5V2.5Vdropout voltage ""ǖ MEP! ……