US 11,921,529 B2
Dual loop digital low drop regulator and current sharing control apparatus for distributable voltage regulators
Yi-Chun Shih, Hillsboro, OR (US); Kaushik Mazumdar, Charlottesville, VA (US); Stephen T. Kim, Hillsboro, OR (US); Rinkle Jain, Portland, OR (US); James W. Tschanz, Portland, OR (US); and Muhammad M. Khellah, Tigard, OR (US)
Assigned to Intel Corporation, Santa Clara, CA (US)
Filed by Intel Corporation, Santa Clara, CA (US)
Filed on Jun. 26, 2020, as Appl. No. 16/914,174.
Application 16/914,174 is a continuation of application No. 13/801,777, filed on Mar. 13, 2013, granted, now 10,698,432.
Prior Publication US 2020/0393861 A1, Dec. 17, 2020
This patent is subject to a terminal disclaimer.
Int. Cl. G05F 1/46 (2006.01); G05F 1/56 (2006.01); G05F 1/563 (2006.01); H02M 3/15 (2006.01); G05F 1/00 (2006.01); H02M 3/156 (2006.01)
CPC G05F 1/563 (2013.01) [G05F 1/46 (2013.01); G05F 1/00 (2013.01); H02M 3/156 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a first plurality of power drivers and a second plurality of power drivers coupled to a load to supply an output voltage to the load; and
a controller coupled to the first and second pluralities of power drivers, wherein the controller is to implement a first loop to provide fine control bits to the first plurality of power drivers according to a difference between a first reference voltage and the output voltage, and to implement a second loop to provide coarse control bits to the second plurality of power drivers according to a difference between a second reference voltage and the output voltage, wherein the fine control bits indicate a number of power drivers to turn on among the first plurality of power drivers, the coarse control bits indicate a number of power drivers to turn on among the second plurality of power drivers, and a current step size of the coarse control bits is greater than a current step size of the fine control bits.