| 摘要 |
A primary current circuit 42 that outputs a primary current IPTAT proportional to the primary coefficient of temperature, secondary current circuit 43 outputs a secondary current IPTAT 2 proportional to the Nth (N: an integer of 2 or larger) coefficient of temperature based on the primary current, constant current source 41 that supplies current to the primary and secondary currents, and power control switch Q 11 that shuts down the voltage supply based on a rise in the secondary current.
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