Two-terminal semiconductor overcurrent limiter

摘要

A semiconductor overcurrent limiter having input and output terminals (1, 2) includes a depletion type vertical MOSFET (10), a depletion type lateral MOSFET (20), and a zener diode (4). A back gate (25) of the lateral MOSFET (20) is formed in common with a drain electrode of the vertical MOSFET (10) to provide the input terminal (1), and a gate (13) of the vertical MOSFET (10) is connected to an anode of the zener diode (4) to provide the output terminal (2). Further, a source electrode (12) of the vertical MOSFET (10) is connected to source and gate electrodes (22, 23) of the lateral MOSFET (20) and a cathode electrode (6) of the zener diode (4).