Qwiic Boost increases the Qwiic bus from 3.3V to 5V while still providing the target device with 3.3V I2C signals. This is a handy board for connecting technologies that still require 5V for running higher voltage mechanisms（like a DC fan）but have an internal processor running at 3.3V. We've seen this a lot with air quality sensors that use a fan to push air into a test chamber.
The 5V boost circuit is rated up to 100mA with 90％ efficiency. For applications where the 5V device needs 5V I2C signals, a conversion circuit is provided with the board. A jumper is available to select between 3.3V（default）and 5V I2C signals.
The SparkFun Qwiic Connect System is an ecosystem of I2C sensors, actuators, shields and cables that make prototyping faster and less prone to error. All Qwiic-enabled boards use a common 1mm pitch, 4-pin JST connector. This reduces the amount of required PCB space, and polarized connections mean you can't hook it up wrong.
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