The AS1331 is a synchronous buck-boost DC/DC converter which can handle input voltages above, below, or equal to the output voltage.
Due to the internal structure of the AS1331 which is working continuously through all operation modes, this device is ideal for single cell Li-Ion and multicell alkaline/NiCad/NiMH applications.
The AS1331 operates on lowest quiescent current of 22µA only resulting in highest efficiency up to 90% over a wide range of load currents. Combined with a shutdown current of typically 100nA, the AS1331 extends the lifetime of battery powered applications to a maximum.
The AS1331 allows a small solution footprint and external component count is also minimized. For power monitoring, the AS1331 offers either low battery detection or a power-ok feature offering flexibility for the design of applications. Additionally the AS1331 offers current limiting, thermal shutdown and output disconnect.