Detecting power supply sag in an integrated circuit

摘要

An integrated circuit is provided with a voltage sag detector (VSD) within the integrated circuit package. The VSD is coupled to a voltage reference and to the power distribution bus within the integrated circuit. The VSD has an output for indicating when a voltage level on the power distribution bus sags below a voltage level provided by the voltage reference.

主权项

1. An integrated circuit, comprising:
(a) voltage and ground leads; (b) an internal power bus coupled to the voltage and ground leads; (c) circuitry coupled to the power bus, the circuitry including a ball grid array matrix of solder bumps connected to the power bus; and (d) a voltage sag detector including:
i. a voltage reference having a reference voltage output;ii. a comparator having an input connected to the reference voltage output, an input coupled to the internal power bus, and a comparator output; andiii. a latch having an input coupled to the comparator output and a latch output.