Austriamicrosystems has expanded its DC-DC product portfolio with the introduction of the AS1337 200mA boost converter with buck functionality. With a continuous transition between boost and regulated buck mode the AS1337 is suitable for single or dual cell applications.
The AS1337 offers an adjustable output voltage range from 2.5 to 5.0V from an input voltage range of 0.65V to 4.5V. From a two cell battery with a voltage range between 1.8V and 3.6V the AS1337 offers 200mA of output current at 3V. From a single cell 100mA can still be generated. Combined with two small capacitors and one chip-scale inductor the AS1337 provides a small and low profile footprint solution, typically required in battery powered applications. Furthermore this low voltage DC-DC IC offers power-ok signaling.
Austriamicrosystems’ AS1337 implements boost architecture with efficiencies up to 97%. Furthermore the converter is capable of entering into buck mode when the input voltage is higher than the output voltage and therefore adopts a buck-boost behavior at the cost of a single boost converter.
In shutdown mode the AS1337B version offers a battery disconnect function, where the input is disconnected from the output. The AS1337A connects the input to the output enabling the supply of real time clocks or memories during shutdown for example. Austriamicrosystems’ AS1337 draws only 10nA shutdown current, which further extends battery life.
The AS1337 is available in a TDFN (3x3)-8 package and is suitable for operating temperatures ranging from -40 to +85°C.