A magnetic flowmeter for measuring a fluid flow, comprising: a flow tube assembly receiving the fluid flow and having a coil with first and second coil wires for receiving a coil current and responsively producing a magnetic field thereby generating an EMF in the fluid representative of a flow rate; an EMF sensor arranged to sense the EMF and generate an output indicating the flow rate; an H-bridge driver configured to apply a current supply signal to the coil and switch the direction of the current applied to the coil; and a load leveling boost supply configured to provide power to the H-bridge driver and condition the input current (I IN) from a DC source, wherein the load leveling boost supply is coupled to an input voltage (V IN) and is configured to apply a voltage to the coil which is greater than an input voltage (V IN), wherein the load leveling boost supply includes: a switch configured to selectively couple an inductor to electrical ground and thereby generate the voltage which is greater than the input voltage (V IN), wherein the H-bridge driver is connected to the voltage, and a controller configured to sense the input current (I IN) using a first current sensor through a first low pass filter and a current output (I Out) of the H-bridge driver using a second sensor through a second low pass filter, wherein the controller is configured to compare signals of the first and second current sensor (132, 134) and control operation of the switch to maintain the input current (I IN) at a relatively constant level. a flow tube assembly receiving the fluid flow and having a coil with first and second coil wires for receiving a coil current and responsively producing a magnetic field thereby generating an EMF in the fluid representative of a flow rate; an EMF sensor arranged to sense the EMF and generate an output indicating the flow rate; an H-bridge driver configured to apply a current supply signal to the coil and switch the direction of the current applied to the coil; and a load leveling boost supply configured to provide power to the H-bridge driver and condition the input current (I IN) from a DC source, wherein the load leveling boost supply is coupled to an input voltage (V IN) and is configured to apply a voltage to the coil which is greater than an input voltage (V IN), wherein the load leveling boost supply includes: a switch configured to selectively couple an inductor to electrical ground and thereby generate the voltage which is greater than the input voltage (V IN), wherein the H-bridge driver is connected to the voltage, and a controller configured to sense the input current (I IN) using a first current sensor through a first low pass filter and a current output (I Out) of the H-bridge driver using a second sensor through a second low pass filter, wherein the controller is configured to compare signals of the first and second current sensor (132, 134) and control operation of the switch to maintain the input current (I IN) at a relatively constant level. a switch configured to selectively couple an inductor to electrical ground and thereby generate the voltage which is greater than the input voltage (V IN), wherein the H-bridge driver is connected to the voltage, and a controller configured to sense the input current (I IN) using a first current sensor through a first low pass filter and a current output (I Out) of the H-bridge driver using a second sensor through a second low pass filter, wherein the controller is configured to compare signals of the first and second current sensor (132, 134) and control operation of the switch to maintain the input current (I IN) at a relatively constant level.