Designing fuel gauges in portable devices typically requires an extensive characterisation of each battery type, used in specific applications, which means that the developers have to perform complicated battery characterisation, adding weeks of time and resources to the design cycle.

Maxim Integrated Products is addressing this issue with its MAX17055 ModelGauge m5, which offers what the company claims is the industry's most accurate fuel gauge—within 1% state of charge (SOC) error for most cases—allowing the designer to plan for a shutdown that maximises the device run-time.

The MAX17055 also draws a low quiescent current of 7µA in the low-power operating mode. It is available in a 1.4mm x 1.5mm WLP for space constrained applications. Unlike other gas gauges, the MAX17055 does not have a minimum battery size limit, making it ideal for wearables, smartwatches, smartphones, health and fitness monitors, body cameras, portable medical devices, hearables, drones, virtual reality gear and USB Type-C portable devices.

Maxim_MAX17055_block (cr) Figure 1: The MAX17055 block diagram (Source: Maxim)

The MAX17055 is available from stock and priced at ₹73.43 ($1.08) for 10,000 pieces, while the MAX17055XEVKIT# is available from stock and priced at ₹4,487.66 ($66).