LTC3335EUDC#PBF

LINEAR TECHNOLOGY  LTC3335EUDC#PBF  直流-直流开关降压-升压稳压器, 可调, 1.8V-5.5V输入, 1.8V-5V输出, 50mA输出, QFN-20

The is a nanopower high-efficiency buck-boost DC-to-DC Converter with an integrated precision coulomb counter which monitors accumulated battery discharge in long life battery-powered applications. The buck-boost can operate down to 1.8V on its input and provides eight pin-selectable output voltages with up to 50mA of output current. The coulomb counter stores the accumulated battery discharge in an internal register accessible via an I²C interface. The LTC3335 features a programmable discharge alarm threshold. When the threshold is reached, an interrupt is generated at the /IRQ pin. To accommodate a wide range of battery types and sizes, the peak input current can be selected from as low as 5mA to as high as 250mA and the full-scale coulomb counter has a programmable range of 32,768:1.

.

Integrated coulomb counter measures accumulated battery discharge

.

Programmable coulomb counter prescaler for wide range of battery sizes

.

Programmable discharge alarm threshold

.

Up to 90% efficiency

.

±5% Battery discharge measurement accuracy

.

680nA Low input quiescent current output in regulation at no load