Micropower DC- DC Converter Adjustable and Fixed 3.3 V, 5 V, 12 V
Rochester Electronics is the only authorized source of Analog Devices' products that have previously been discontinued or have become obsolete. Product availability should be checked directly with Rochester Electronics.
The ADP1108 is a highly versatile micropower switch- mode dc- dc converter that operates from an input voltage supply as low as 2.0 V and typically starts up from 1.8 V.
The ADP1108 can be programmed into a step- up or step- down dc- to- dc converter with only three external components. The fixed outputs are 3.3 V, 5 V and 12 V. An adjustable version is also available. In step- up mode, supply voltage range is 2.0 V to 12 V, and 30 V in step- down mode. The ADP1108 can deliver 150 mA at 5 V from a 2 AA cell input and 300 mA at 5 V from a 9 V input in step- down mode. Switch current limit can be programmed with a single resistor.
For battery operated and power conscious applications, the ADP1108 offers a very low power consumption of less than 110 µA.
The auxiliary gain block available in ADP1108 can be used as a low battery detector, linear post regulator, under voltage lockout circuit or error amplifier.