Available in a 1.2 x 0.8 x 0.4mm, six-pin WLCSP, the converter provides outputs of between 2.7 and 5.0V from a 2.7 to 5.5V input voltage range. It is available with an adjustable output voltage, or a factory-programmed fixed output voltage. Depending on the input voltage, it can provide a maximum output current of up to 200mA.
Its size means that an AS1383-based circuit is suitable for use in consumer products such as wristbands, media players, digital cameras and mobile phones.
The AS1383 features internal NMOS and PMOS power switches with low on-resistance and gate charge. This helps the converter to achieve efficiency, peaking at 92%, across the range from moderate to full loads.
In addition, it offers a ‘Powersave’ mode in which all circuitry except that required to monitor the output voltage is turned off when the output current falls below the point at which the energy supplied in the switch's minimum on-time is greater than the energy consumed by the load. This Powersave mode keeps power consumption down to a typical 25µA when supplying light loads.
