Electronic device that measures a standby current of a circuit after burn-in
View Patent ↗Provided is an electronic device which can easily measure a standby current of an internal circuit of an electronic device after burn-in. The electronic device includes: a power source terminal; a regulator that generates a predetermined voltage from a voltage of the power source terminal; an internal circuit that is operated by an output voltage of the regulator; and a standby terminal through which the regulator and the internal circuit are set to a low power consumption state.
1. An electronic device comprising:
a power source terminal;
a regulator that generates a predetermined voltage from a voltage of the power source terminal;
an internal circuit that is operated by an output voltage of the regulator;
a standby terminal through which the regulator and the internal circuit are set to a low power consumption state; and
a burn-in terminal that shifts the output voltage of the regulator to a state that changes according to the voltage of the power supply, wherein
when predetermined voltage is applied to the burn-in terminal, the output voltage of the regulator which is lower than the voltage of the power supply terminal is applied to the internal circuit,
when a predetermined voltage is applied to the standby terminal, the regulator and the internal circuit are brought into a low power consumption state so that the current of the power supply terminal and the current of the output terminal of the regulator are made equal, and
when a predetermined voltage is applied to both the burn-in terminal and the standby terminal, the standby current of the internal circuit can be detected only by measuring the current of the power supply terminal.
2. The electronic device according to claim 1 , comprising:
a unit that changes the output voltage of the regulator according to a voltage of the power source terminal.
3. The electronic device according to claim 1 , comprising:
a burn-in terminal through which it is caused a state where the output voltage of the regulator is changed according to the voltage of the power source terminal.
4. The electronic device according to claim 1 , comprising:
a unit that sets a current of the power source terminal to be equal to a current of an output terminal of the regulator.
5. The electronic device according to claim 3 ,
wherein the burn-in terminal and the standby terminal are configured from the same terminal, and
the electronic device includes a three-level logic circuit that causes a state where the output voltage of the regulator is changed according to the voltage of the power source terminal, and causes the regulator and the internal circuit move to the low power consumption state according to a voltage level applied to the same terminal.
6. The electronic device according to claim 2 ,
wherein, when the regulator and the internal circuit are in the low power consumption state, the regulator and the internal circuit enter a state where the output voltage of the regulator is changed according to the voltage of the power source terminal.
7. The electronic device according to claim 2 ,
wherein, when the output voltage of the regulator is changed according to the voltage of the power source terminal, the output voltage of the regulator is set to be low compared to the voltage of the power source terminal.
8. The electronic device according to claim 1 ,
wherein an output circuit of the regulator is configured by an NPN-type transistor, and
the electronic device includes a switching element that blocks a current flowing to a ground side of a base terminal of the NPN-type transistor.
9. The electronic device according to claim 1 ,
wherein an output circuit of the regulator is configured by a PNP-type transistor, and
the electronic device includes a switching element that blocks a current flowing to a ground side of a base terminal of the PNP-type transistor.
10. The electronic device according to claim 2 ,
wherein an output circuit of the regulator is configured by a MOS-type transistor, and
wherein the MOS-type transistor is turned on in a state where the output voltage of the regulator is changed according to the voltage of the power source terminal.
11. The electronic device according to claim 2 , comprising:
a switch that connects the power source terminal and a power source of the internal circuit,
wherein the switch is turned on in a state where the output voltage of the regulator is changed according to the voltage of the power source terminal.
12. The electronic device according to claim 1 ,
wherein the regulator and the internal circuit are disposed in the same integrated circuit.
13. An electronic device comprising:
a power source terminal;
a regulator that generates a predetermined voltage from a voltage of the power source terminal;
an internal circuit that is operated by an output voltage of the regulator;
a standby terminal through which the regulator and the internal circuit are set to a low power consumption state; and
a burn-in terminal through which it is caused a state where the output voltage of the regulator is changed according to the voltage of the power source terminal, wherein
the burn-in terminal and the standby terminal are configured from the same terminal, and
the electronic device includes a three-level logic circuit that causes a state where the output voltage of the regulator is changed according to the voltage of the power source terminal, and causes the regulator and the internal circuit move to the low power consumption state according to a voltage level applied to the same terminal.
14. The electronic device according to claim 13 , comprising:
a unit that changes the output voltage of the regulator according to a voltage of the power source terminal.
15. The electronic device according to claim 13 , comprising:
a unit that sets a current of the power source terminal to be equal to a current of an output terminal of the regulator.
16. The electronic device according to claim 14 ,
wherein, when the regulator and the internal circuit are in the low power consumption state, the regulator and the internal circuit enter a state where the output voltage of the regulator is changed according to the voltage of the power source terminal.
17. The electronic device according to claim 14 ,
wherein, when the output voltage of the regulator is changed according to the voltage of the power source terminal, the output voltage of the regulator is set to be low compared to the voltage of the power source terminal.
18. The electronic device according to claim 13 ,
wherein an output circuit of the regulator is configured by an NPN-type or a PNP-type transistor, and
the electronic device includes a switching element that blocks a current flowing to a ground side of a base terminal of the NPN-type transistor, or of the PNP-type transistor.
19. The electronic device according to claim 14 ,
wherein an output circuit of the regulator is configured by a MOS-type transistor, and
wherein the MOS-type transistor is turned on in a state where the output voltage of the regulator is changed according to the voltage of the power source terminal.
20. The electronic device according to claim 14 , comprising:
a switch that connects the power source terminal and a power source of the internal circuit,
wherein the switch is turned on in a state where the output voltage of the regulator is changed according to the voltage of the power source terminal.