An overcurrent detecting circuit and reference voltage circuit may reduce the current consumed by an electronic circuit. The circuit may includes a reference load through which a reference current flows, generating a reference voltage. A differential amplifier section is included to amplify the difference in the potentials of two inputs. At least part of a bias current supplied by a constant current source to the differential amplifier section flows to the reference load. A detection voltage, corresponding to a current subject to overcurrent detection, is inputted to one of the two inputs of the differential amplifier section.