LT1054L

The LT^®1054 is a monolithic, bipolar, switched-capacitorvoltage converter and regulator. The LT1054 provideshigher output current than previously available converterswith significantly lower voltage losses. An adaptive switchdriver scheme optimizes efficiency over a wide range ofoutput currents. Total voltage loss at 100mA output currentis typically 1.1V. This holds true over the full supply voltagerange of 3.5V to 15V. Quiescent current is typically 2.5mA.

The LT1054 also provides regulation, a feature not previ-ously available in switched-capacitor voltage converters.

By adding an external resistive divider a regulated outputcan be obtained. This output will be regulated againstchanges in both input voltage and output current. TheLT1054 can also be shut down by grounding the feedbackpin. Supply current in shutdown is less than 100µA.

The internal oscillator of the LT1054 runs at a nominalfrequency of 25kHz. The oscillator pin can be used to adjustthe switching frequency or to externally synchronize theLT1054.

The LT1054 is pin compatible with previous converterssuch the LTC1044/LTC7660.