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: 17Ω (Typical)

TC1240A: 12Ω (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