Patent ID: 8767413

Claim:
An integrated switching power supply device comprising: a series-connected body in which a switching element, a constant current element, and a diode are connected in series; a driving control element connected to a control terminal of the constant current element and configured to control to drive the constant current element; and a plurality of external terminals including a first external terminal connected to a main terminal of an element located on one end side of the series-connected body, a second external terminal connected to a main terminal of an element located on one other end side of the series-connected body, a third external terminal connected to a connection point of a main terminal of the switching element or the constant current element and a main terminal of the diode, a fourth external terminal connected to a control terminal of the switching element, a fifth external terminal connected to the driving control element and connected to a power supply source for the driving control element, a sixth external terminal connected to the driving control element and configured to input reference potential to the driving control element, and a seventh external terminal connected to the driving control element and configured to input a signal to the driving control element from an outside.