| 摘要 |
PROBLEM TO BE SOLVED: To realize both of low-voltage driving and stable driving with a small-scaled circuit configuration.SOLUTION: A linear power supply 1 comprises: a first output transistor 10 of P-channel type (or PNP type) connected between an output end of an input voltage Vin and an output end of an output voltage Vout; a second output transistor 20 of N-channel type (or NPN type) connected in parallel with the first output transistor 10; and a control circuit 30 which switches between a first mode in which the first output transistor 10 is used as an output transistor for generating the output voltage Vout from the input voltage Vin and a second mode in which the second output transistor 20 is used, according to the input voltage Vin.SELECTED DRAWING: Figure 1 |
