The first, and probably most common method for sensing current is through resistance detection. This is often achieved through a shunt resistor and high-speed amplifier solution where current going through the resistor is converted into voltage. While this solution is simple to populate and easy to handle, there is often heat generated by the power lost though the resistor. The other method for detecting current is by measuring the magnetic field generated by the current flow. This can be split into two categories, with core and with coreless technology. When measuring with a core, the mag field though a trace can be multiplied and thus sensed easier by conventional mag sensor solutions. While this solution generates no heat through power loss, the population area is huge due to the core required. Coreless technology works on a similar principle; but routes the current trace near the sensor element. Typical applications of this use Hall sensor based technology and route the current through the trace in order get a strong enough field sensed to measure the current. However, since the power is being routed though the IC, the overall measurement range is limited to the package’s current capability. This is where ROHM’s magnetic impedance (MI) solution comes in handy; instead of using hall sensor based technology, ROHM’s MI based sensor technology is much more sensitive allowing the trace to be routed underneath the IC, and thus provides a solution that is simple to use, has much more sensing range, and has no heat generated by power loss.