Boost regulator extends battery life in wearable and consumer apps

March 14, 2017 // By Graham Prophet
Maxim's 'nanoPower' MAX17222 features 300 nA IQ and 95% peak efficiency, and reduces solution size by up to 50%; the devcie enables the longest battery life in the smallest form factor for wearable and consumer IoT designs; it is a 0.4V to 5.5V input, 1.8V to 5V output boost regulator with 500 mA input current limit.

MAX17222 claims lowest quiescent current, and minimizes heat dissipation and shutdown current. In True Shutdown mode, the current draw of 0.5 nA virtually stops battery drain to provide the longest battery life and eliminate the need for external disconnect switches. Reducing solution size compared to other similar products, the MAX17222 is internally compensated and requires only a single configuration resistor and small output filter for a full power solution. The boost regulator comes in 0.88 x 1.4 mm 6-bump WLP and 2 x 2 mm 6-pin standard µDFN packages. It operates over the -40 to +85C temperature range. Battery drain is reduced during standby and shutdown modes to maximize operating time; 0.4V input (with 0.88V startup input) is compatible with low voltage batteries and supercapacitors. It is priced at $1.23 (1000). The MAX17222EVKIT# evaluation kit is available for $34.99, and an EE-Sim® model is available.

Maxim Integrated; www.maximintegrated.com/nanopower and www.maximintegrated.com/products/MAX17222