TPS62743 is an Ultra-Low-Power DCDC Converter in WCSP

This post sponsored by Texas Instruments.

The TPS62743 is a high-efficiency, step-down converter with ultra-low quiescent current of typical 360nA. 

The device is optimized to operate with a 2.2µH inductor and 10µF output capacitor. It uses DCS-Control and operates with a typical switching frequency of 1.2MHz. In Power Save Mode, the TPS62743 extends the light load efficiency down to a load current range of 10µA and below.

TI's TPS62743 provides an output current of 300mA. Once started, it operates down to an input voltage range of 2.0V. This allows to operate the device directly from a single Li-MnO2 coin cell.

The TPS62743 provides eight programmable output voltages between 1.2V and 3.3V. The voltages are selectable by three selection pins. It is optimized to provide a low-output voltage ripple and low noise using a small output capacitor. Once the input voltage comes close to the output voltage, the device enters the No Ripple 100% mode to prevent an increase of output ripple voltage. In this operation mode, the device stops switching and turns the high side MOSFET switch on.

Applications for the TPS62743 include wearables, fitness trackers, smart watches, health monitoring, and energy harvesting.

By: Rachel Kalina

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