US 11,942,779 B2
Shutdown mode for bandgap and bias circuit with voltage comparator to reduce leakage current
Bang Li Liang, Ottawa (CA); and Tom Taoufik Bourdi, Irvine, CA (US)
Assigned to SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Oct. 28, 2020, as Appl. No. 17/082,147.
Claims priority of provisional application 63/064,042, filed on Aug. 11, 2020.
Claims priority of provisional application 62/927,752, filed on Oct. 30, 2019.
Prior Publication US 2021/0132642 A1, May 6, 2021
Int. Cl. H03K 19/20 (2006.01); G01R 19/165 (2006.01); H02H 9/02 (2006.01); H03K 17/22 (2006.01); H03K 19/00 (2006.01)
CPC H02H 9/025 (2013.01) [G01R 19/16538 (2013.01); H03K 17/22 (2013.01); H03K 19/0016 (2013.01); H03K 19/20 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A controller having a mode of operation including one of an on mode and an off mode, the controller comprising:
a voltage supply node;
a mode of operation signal node;
a powered component;
a switching device coupled in series between the voltage supply node and the powered component; and
a power supply detector coupled to the switching device, the voltage supply node, and the mode of operation signal node, the power supply detector being configured to
receive a mode of operation signal indicative of the mode of operation of the controller from the mode of operation signal node,
determine that the controller is in the off mode based on the mode of operation signal, and
control the switching device to prevent a current from passing from the voltage supply node to the powered component responsive to determining that the controller is in the off mode.