Patent ID: 11906997
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Control (Instruments)
Classification: CPC G  H | IPC G  H

Claim 10:
11. A level shifter comprising:
a Low-Dropout voltage regulator (LDO) comprising:
an amplifier configured to produce a source current to or a sinking current from a load;
a Voltage Reference Generator (VREFGEN) circuit, connected to an input of the amplifier, configured to track a fixed voltage reference (VREF) and supply a voltage reference output (VREFM) to the amplifier;
a decoupling capacitor, connected to an output of the amplifier, configured to decouple a high-edge ground (HGND) from a power source; and
a Power Down Control Unit (PDCTRL) configured to maintain the HGND in an active mode or a power-down mode;

wherein the VREFM of the LDO is directly forced by an input voltage or is forced through the VREFGEN, which is configured to transfer directly a difference between a core power and an IO power.