It follows the Kionix KXTJ2 accelerometer, but offers a size and price point that is embedded in toys, wearables, remote controls to the SmartHome and internet of things (IoT).
The STSPIN250 driver integrates a full power-MOSFET bridge and fixed off-time PWM current controller in a tiny 3.0 x 3.0mm package that saves space in portable equipment. The low on-resistance of the power stage (200mOhm total, high-side + low-side) and what STMicroelectronics claims is the best-in-the market current-sipping standby mode — below 80nA – to help maximise battery runtime and keep equipment-case temperatures down. Its supply-voltage range of 10 to 1.8V allows designers to specify a power source as small as a single Li-Ion cell.
The MAX17222 nanoPower boost regulator from Maxim Integrated Products, has quiescent current (IQ) of only 300nA. The 0.4 to 5.5V input, 1.8 to 5.0V output boost regulator has 500mA input current limit, and reduces solution size by up to 50 per cent compared to similar products, claims the company, and offers 95 per cent peak efficiency to minimise heat dissipation. The resulting benefits make the nanoPower boost regulator suitable for wearable devices.
The low quiescent current of just 0.25microA and one per cent accuracy enables designs to achieve extended battery life, says Diodes, while a chip‑scale package (CSP) that measures just 0.64mm² reduces board space requirements.
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