Patent ID: 8810144
Filing Date: 2014-08-19
Classification: H03K,H05B

Abstract:
1. A voltage regulator, comprising: a charging switch including a first terminal coupled to a high voltage node, a second terminal, and a control terminal; a rectifier coupled to the second terminal of the charging switch; an output capacitor coupled to the rectifier; a control switch coupled to the second terminal; and a control voltage regulation circuit coupled to the control terminal of the charging switch; wherein the control switch and the charging switch are configured so that when the control switch is turned off, a rise in voltage on the control switch causes an increase in voltage on the control terminal of the charging switch sufficient to allow a charging current to flow through the rectifier and into the output capacitor; and wherein the control voltage regulation circuit is configured to dissipate the increased voltage on the control switch so that the charging current only flows for a limited period of time in response to the control switch being turned off.