LM2664 Switched Capacitor Voltage Converter

1 Features

• Inverts Input Supply Voltage
• 6-Pin SOT-23 Package
• 12-Ω Typical Output Impedance
• 91% Typical Conversion Efficiency at 40 mA
• 1-µA Typical Shutdown Current

2 Applications

• Cellular Phones
• Pagers
• PDAs
• Operational Amplifier Power Suppliers
• Interface Power Suppliers
• Handheld Instruments

3 Description

The LM2664 CMOS charge-pump voltage converter inverts a positive voltage in the range of 1.8 V to 5.5 V to the corresponding negative voltage of −1.8 V to −5.5 V. The device uses two low-cost capacitors to provide up to 40 mA of output current.

The LM2664 operates at 160-kHz oscillator frequency to reduce output resistance and voltage ripple. With an operating current of only 220 µA (operating efficiency greater than 91% with most loads) and 1-µA typical shutdown current, the LM2664 provides ideal performance for battery-powered systems.

1. For all available packages, see the orderable addendum at the end of the datasheet.

Voltage Inverter

5 V to −10 V Converter

4 Revision History

Changes from D Revision (May 2013) to E Revision

• Added Pin Configuration and Functions section, Handling Rating table, Feature Description section, Device Functional Modes, Application and Implementation section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and Mechanical, Packaging, and Orderable Information section Go

Changes from C Revision (May 2013) to D Revision

• Changed layout of National Data Sheet to TI formatGo

5 Pin Configuration and Functions

SOT-23 (DBV)

6 Pins

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