Patent ID: 7906946
Filing Date: 2011-03-15
Classification: G05F

Abstract:
1. An electric apparatus comprising: an external output transistor to be coupled with an external unit; and a semiconductor integrated circuit device for controlling the external output transistor, the semiconductor integrate circuit device including the plurality of terminals includes at least one of the high and low electric potential side power supply terminals is arranged adjacent to the control signal output terminal and defined as a first terminal; short-circuiting between the control signal output terminal and the first terminal short-circuit causes the external output transistor to switch into an off state; and at least one of the plurality of terminals, the one which is arranged adjacent to the voltage output terminal, provides a high impedance terminal or an input and output current limit terminal when the second power supply circuit is in an operating state, wherein the external output transistor is an NPN type transistor or an N channel type transistor; the external output transistor includes a first main terminal and a second main terminal, which are provided in a power line leading to an external power source output terminal; the plurality of terminals is adjacently arranged in the following order: the low electric potential side power supply terminal, the control signal output terminal, and the voltage output terminal, the plurality of terminals further includes a phase compensation input terminal for inputting a phase compensation signal to the output circuit of the first power supply circuit from the second main terminal of the external output transistor; the output circuit of the first power supply circuit includes a push-pull circuit; the push-pull circuit is connected between the high electrical potential side power supply terminal and the low electric potential side power supply terminal; the push-pull circuit includes a P channel or PNP type transistor and an N channel or NPN type transistor; the output node of the output circuit is connected between the P channel or PNP type transistor and the N channel or NPN type transistor; the phase compensation signal is input to a control terminal of the P channel or PNP type transistor; and the plurality of terminals is adjacently arranged in the following order: the low electric potential side power supply terminal, the control signal output terminal, the voltage output terminal, the phase compensation input terminal, and the high electric potential side power supply terminal.