REGULATOR CIRCUITRY CAPABLE OF TRACKING REFERENCE VOLTAGES

摘要

An integrated circuit having a regulator circuit capable of tracking reference voltages is provided. The integrated circuit includes shunt regulator circuitry. The shunt regulator circuitry includes a shunt regulator circuit and a voltage tracking circuit. The shunt regulator circuit has an output on which a regulated voltage is provided. The shunt regulator circuit also provides electrical current to the output when the regulated voltage is outside of a voltage range bounded by first and second reference voltages. The voltage tracking circuit may be coupled to the shunt regulator circuit. The voltage tracking circuit may generate the first and second reference voltages. In one instance, the first voltage is greater than the regulated voltage and the second voltage is less than the regulated voltage.

主权项

1. An integrated circuit comprising shunt regulator circuitry, wherein the shunt regulator circuitry comprises:
a shunt regulator circuit having an output on which a regulated voltage is provided, wherein the shunt regulator circuit provides current to the output when the regulated voltage is outside of a voltage range bounded by first and second reference voltages; and a voltage tracking circuit coupled to the shunt regulator circuit, wherein the voltage tracking circuit generates the first and second reference voltages, wherein the first voltage is greater than the regulated voltage, wherein the second voltage is less than the regulated voltage, and wherein the voltage tracking circuit comprises:
a positive power supply terminal;first and second resistors coupled in series between the output of the shunt regulator circuit and the positive power supply terminal;a ground power supply terminal; andthird and fourth resistors coupled in series between the output of the shunt regulator circuit and the ground power supply terminal.