TPS62743 is a high efficiency step-down converter with ultra-low quiescent current (360nA typical) from Texas Instruments.
The device is optimized to work with a 2.2µH inductor and a 10µF output capacitor. It uses DCS-Control and operates at a typical switching frequency of 1.2MHz. In power-saving mode, the device reduces light load efficiency to a load current range of 10µA and below. The TPS62743 provides 300mA output current. Once started, the device will operate over an input voltage range as low as 2.0V. This allows the device to be operated directly from a single Li-MnO2 button battery.
The TPS62743 can select eight programmable output voltages through three select pins, ranging from 1.2V to 3.3V. The TPS62743 is optimized to use a small output capacitor to provide low output voltage ripple and low noise. Once the input voltage approaches the output voltage, the device enters 100% ripple-free mode to prevent the output ripple voltage from increasing. The company states that in this mode of operation, the device stops switching and turns on the high-side MOSFET switch.
