Patent ID: 7802113
Filing Date: 2010-09-21
Classification: H02M

Abstract:
1. An integrated system on a chip, comprising: a microcontroller unit for performing predefined digital processing functions on the chip, said processing circuitry operating responsive to a regulated voltage; off-chip reactive components; and an on-chip boost converter controller circuit connected only to the off-chip reactive components for generating the regulated voltage responsive to an off-chip voltage provided by an off-chip voltage source, wherein the regulated voltage is greater than the off-chip voltage, wherein the on-chip boost converter circuit is configured to operate in a first mode of operation providing a first power efficiency response and to operate in a second mode of operation providing a second power efficiency response wherein the on-chip boost converter controller circuit further comprises: a zero volt turn-on rectifier, wherein the zero volt turn-on rectifier further includes a first transistor associated with the first mode of operation and a second transistor associated with the second mode of operation, the first and second transistors selected responsive to control signals provided by the microcontroller unit.