Lowest current consumption in step-down switching regulators for wearables and IoT

Lowest current consumption in step-down switching regulators for wearables and IoT

New Products |
By Nick Flaherty

The low current in the S-85S1P Series and the S-85S1A Series can extend battery life by a factor of 2.5 says the company.

The S-85S1A Series features the industry’s lowest quiescent current of 260 nA and a resulting high efficiency of 90.5% at a 100 μA load. This allows design engineers to extend battery operation time by up to 2.5 times compared to conventional LDO regulators. The S-85S1A Series enables extended operation of wearable and IoT devices powered by small-sized batteries. The devices use SII’s proprietary constant on-time (COT) allows the circuit to achieve fast transient response to load fluctuation.

The S-85S1P Series features a power monitoring output function which divides battery voltage input into fractions of half or one third. The connection of this output to a low voltage microcontroller A/D converter enables monitoring of the battery voltage, or input voltage to the regulator. Conventional designs use external resistors to divide the voltage for monitoring. The S-85S1P Series allows for reduced external component count and less board space, while improving current consumption and accuracy when compared to the current conventional design.

Both the S-85S1A Series and the S-85S1P Series feature a small package to help reduce circuit design size and thickness. The packages are respectively SNT-6A (1.80×1.57×0.5mm) and SNT-8A (2.46×1.97×0.5mm).

The S-85S1A is available now and the S-85S1P will be available by the end of April 2017. 

For more information see

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