General Description

HT7660 is a monolithic CMOS switched-capacitor voltage converter. HT7660 is designed to complete a voltage conversion from positive to negative. The only required external components are two low cost electrolytic capacitors.

Features

• Simple conversion of VDD to -VDD

• Cascade connection (two devices are connected,

VOUT= -2 VDD)

• Boost pin for higher switching frequency

• Easy to use

- Requires only two external capacitors

• No external diode required

• Typically with no load voltage conversion, 99.9 efficiency

• Typical power efficiency is 98

• Wide operating voltage range: 3V to 12V

• 8-pin DIP/SOP package

Applications

• RS-232 power supply

• On board negative supply for dynamic RAMS

• Supply voltage splitter, VO= ± VDD/2

• Operation amplifier supply

• Data acquisition systems

• Positive voltage doubler