A voltage divider circuit, comprising: a plurality of divider chains (210, 214, 218, 222) each having a different number of diode-connected transistors, the plurality of divider chains each providing a different voltage-dividing factor, each divider chain (210, 214, 218, 222) being coupled to a power supply voltage node, wherein the transistors of the divider chains (210, 214, 218, 222) are connected in series; a plurality of selector switches corresponding on a one-to-one basis to the plurality of divider chains (210, 214, 218, 222), each selector switch configured to selectively couple the corresponding divider chain (210, 214, 218, 222) to ground responsive to a corresponding selection signal for each selector switch; a plurality of resistive chains (308, 314) corresponding on a one-to-one basis to the plurality of divider chains (210, 214, 218, 222), each resistive chain (308, 314) being coupled to the power supply node and including a matching number of diode-connected transistors as in the corresponding divider chain (210, 214, 218, 222) so as to have the same voltage-dividing factor as in the corresponding divider chain (210, 214, 218, 222); a plurality of monitoring chains (310, 316) corresponding on a one-to-one basis to the plurality of resistive chains (308, 314), each monitoring chain (310, 316) being coupled to the power supply node and configured to mirror a current conducted by the corresponding resistive chain (308, 314), each monitoring chain (310, 316) including a node for producing a node voltage, wherein the nodes are pulled low when the corresponding resistive chain (308, 314) is active, the other chains being inactive; a control circuit configured to control the selection signal for each selector switch responsive to the node voltages for the monitoring chains to maintain a divided supply voltage from a selected one of the divider chains (210, 214, 218, 222) within a pre-determined voltage range; and a plurality of enabling switches corresponding on a one-to-one basis to the plurality of resistive chains (308, 314), each enabling switch configured to selectively couple the corresponding resistive chain (308, 314) to ground responsive to a corresponding enable signal for each enabling switch and wherein the control circuit is further configured to control the enable signals responsive to the node voltages; wherein each monitoring chain (310, 316) includes a plurality of current-mirror transistors each configured to mirror the current in the corresponding resistive chain (308, 314) and wherein each monitoring chain (310, 316) includes a pair of current-mirror transistors. a plurality of divider chains (210, 214, 218, 222) each having a different number of diode-connected transistors, the plurality of divider chains each providing a different voltage-dividing factor, each divider chain (210, 214, 218, 222) being coupled to a power supply voltage node, wherein the transistors of the divider chains (210, 214, 218, 222) are connected in series; a plurality of selector switches corresponding on a one-to-one basis to the plurality of divider chains (210, 214, 218, 222), each selector switch configured to selectively couple the corresponding divider chain (210, 214, 218, 222) to ground responsive to a corresponding selection signal for each selector switch; a plurality of resistive chains (308, 314) corresponding on a one-to-one basis to the plurality of divider chains (210, 214, 218, 222), each resistive chain (308, 314) being coupled to the power supply node and including a matching number of diode-connected transistors as in the corresponding divider chain (210, 214, 218, 222) so as to have the same voltage-dividing factor as in the corresponding divider chain (210, 214, 218, 222); a plurality of monitoring chains (310, 316) corresponding on a one-to-one basis to the plurality of resistive chains (308, 314), each monitoring chain (310, 316) being coupled to the power supply node and configured to mirror a current conducted by the corresponding resistive chain (308, 314), each monitoring chain (310, 316) including a node for producing a node voltage, wherein the nodes are pulled low when the corresponding resistive chain (308, 314) is active, the other chains being inactive; a control circuit configured to control the selection signal for each selector switch responsive to the node voltages for the monitoring chains to maintain a divided supply voltage from a selected one of the divider chains (210, 214, 218, 222) within a pre-determined voltage range; and a plurality of enabling switches corresponding on a one-to-one basis to the plurality of resistive chains (308, 314), each enabling switch configured to selectively couple the corresponding resistive chain (308, 314) to ground responsive to a corresponding enable signal for each enabling switch and wherein the control circuit is further configured to control the enable signals responsive to the node voltages; wherein each monitoring chain (310, 316) includes a plurality of current-mirror transistors each configured to mirror the current in the corresponding resistive chain (308, 314) and wherein each monitoring chain (310, 316) includes a pair of current-mirror transistors.