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General Description

The TC1240/TC1240A is a doubling CMOS charge pump voltage converter in a small 6-Pin SOT-23A package. The TC1240 doubles an input voltage that can range from +2.5V to +4.0V, while the TC1240A doubles an input voltage that can range from +2.5V to +5.5V. Conversion efficiency is typically >99. Internal oscillator frequency is 160 kHz for both devices. The TC1240 and TC1240A have an active-high shutdown that limits the current consumption of the devices to less than 1 μA.

Features

? Charge Pumps in 6-Pin SOT-23A Package

? >99 Typical Voltage Conversion Efficiency

? Voltage Doubling

? Input Voltage Range,

TC1240: +2.5V to +4.0V,

TC1240A: +2.5V to +5.5V

? Low Output Resistance,

TC1240: 17? (Typical)

TC1240A: 12? (Typical)

? Only Two External Capacitors Required

? Low Supply Current,

TC1240: 180 μA (Typical)

TC1240A: 550 μA (Typical)

? Power-Saving Shutdown Mode (1 μA Maximum)

? Shutdown Input Fully Compatible with 1.8V Logic

Systems

Applications

? Cellular Phones

? Pagers

? PDAs, Portable Data Loggers

? Battery Powered Devices

? Handheld Instruments