The LT1054 device is a bipolar, switched-capacitor voltage converter with regulator. It
provides higher output current and significantly lower voltage losses than previously available
converters. An adaptive-switch drive scheme optimizes efficiency over a wide range of output
Total voltage drop at 100-mA output current typically is 1.1 V. This applies to the full
supply-voltage range of 3.5 V to 15 V. Quiescent current typically is 2.5 mA.
The LT1054 also provides regulation, a feature previously not available in
switched-capacitor voltage converters. By adding an external resistive divider, a regulated output
can be obtained. This output is regulated against changes in both input voltage and output current.
The LT1054 can also shut down by grounding the feedback terminal. Supply current in shutdown
typically is 100 µA.
The internal oscillator of the LT1054 runs at a nominal frequency of 25 kHz. The
oscillator terminal can be used to adjust the switching frequency or to externally synchronize the
The LT1054C is characterized for operation over a free-air temperature range of 0°C to
70°C. The LT1054I is characterized for operation over a free-air temperature range of −40°C to