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 twolow 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
   
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