DESCRIPTION
The LTC®660 is a monolithic CMOS switched-capacitor voltage converter. It performs supply voltage conversion from positive to negative from an input range of 1.5V to 5.5V, resulting in complementary output voltages of –1.5V to – 5.5V. It also performs a doubling at an input voltage range of 2.5V to 5.5V, resulting in a doubled output voltage of 5V to 11V. Only two  external capacitors are needed for the charge pump and charge reservoir functions.

FEATURES
■ Simple Conversion of 5V to –5V Supply
■ Output Drive: 100mA
■ ROUT: 6.5Ω (0.65V Loss at 100mA)
■ BOOST Pin (Pin 1) for Higher Switching Frequency
■ Inverting and Doubling Modes
■ Minimum Open Circuit Voltage Conversion Efficiency: 99%
■ Typical Power Conversion Efficiency with a 100mA Load: 88%
■ Easy to Use

APPLICATIONS
■ Conversion of 5V to ±5V Supplies
■ Inexpensive Negative Supplies
■ Data Acquisition Systems
■ High Current Upgrade to LTC1044 or LTC7660