The TPS62743 is a high efficiency step
down converter with ultra low quiescent current of typical 360 nA. The device is optimized to
operate with a 2.2-µH inductor and 10µF output capacitor. The device uses DCS-Control™ and operates
with a typical switching frequency of 1.2 MHz. In Power Save Mode the device extends the light load
efficiency down to a load current range of 10-µA and below. TPS62743 provides an output current
of 300 mA. Once
started the device operates down to an input voltage range of 2.0 V. This allows to operate the
device directly from a single Li-MnO2 coin cell.
The TPS62743 provides 8 programmable output voltages between 1.2V
and 3.3V selectable by three selection pins. The
TPS62743 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.
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