Load switches extend the operating life of battery-powered devices

Toshiba Electronics Europe GmbH has released three load switch products that deliver a remarkable decrease in quiescent current. The new devices are principally intended for usage in wearable and IoT applications where they will control the power supply for peripherals including sensors. They are also useful when upgrading current designs created around discrete semiconductors.

Devices in the new TCK12xBG series offer a new driver circuit that the company has developed, thereby facilitating a typical ON-state quiescent current (IQ) of only 0.08nA. It means a reduction in the region of 99.9% from its current product, TCK107AG. This contributes immensely to expanding the working life of wearables and IoT devices powered by small batteries.

The series has three devices: the TCK127BG provides automatic discharge that turns on at active high; the TCK126BG turns on without automatic discharge; and the TCK128BG at an active low. The devices function from a supply (VIN) and control (VCT) voltage in the range -0.3V to 6.0V. The output current (IOUT) is rated at 1.0A continuously and 2.0A for pulsed operation.

All of the new devices are accommodated in a recently developed WCSP4G package that occupies merely 0.645mm x 0.645mm of board area with a height of 0.465mm, greatly saving space in compact wearable and IoT designs. An innovative backside coating decreases the possibility of damage to the devices through the mounting process.