Miniature load switch integrated circuits (ICs) from Toshiba Electronic Devices & Storage Corporation deliver a marked decrease in quiescent current and an output current rating of 1A. The ICs, housed in a small WCSP4G package, are ideal for designing wearables and internet of things (IoT) devices that consume less power and offer a longer charge life.

The new driver circuit incorporated into this series realizes a typical ON-state quiescent current of 0.08 nA, representing a 99.9% reduction from current product values. In addition to providing efficiency Source: Toshiba Electronic Devices & Storage CorporationSource: Toshiba Electronic Devices & Storage Corporationimprovements that will allow wearables and IoT devices powered by small batteries to operate for significantly longer, the series can replace load switch circuits formed by discrete semiconductors such as metal oxide semiconductor field-effect transistors and transistors.

The WCSP4G package measures only 0.645 mm × 0.645 mm, which allows mounting on small boards. Its back coating can reduce the damage that can occur on such a minute chip in the mounting process.

Three new ICs have been engineered: TCK127BG with automatic discharge that turns on at active high; TCK126BG without automatic discharge that turns on at active high; and TCK128BG with automatic discharge that turns on at active low. This offers product developers and designers the freedom to select the load switch IC that best suits their design requirement.

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