TC7660S charge pump voltage converter in an 8 pin DIP package. The TC7660S device is a pin-compatible replacement for the industry standard 7660 charge pump voltage converter. It converts a +1.5V to +12V input to a corresponding -1.5V to -12V output using only two low-cost capacitors, eliminating inductors and their associated cost, size and electromagnetic interference (EMI). Added features include an extended supply range to 12V, and a frequency boost pin for higher operating frequency, allowing the use of smaller external capacitors.

The on-board oscillator operates at a nominal frequency of 10 kHz. Frequency is increased to 45 kHz when pin 1 is connected to V+. Operation below 10 kHz (for lower supply current applications) is possible by connecting an external capacitor from OSC to ground (with pin 1 open).

Features

• Oscillator boost from 10 kHz to 45 kHz
• Converts +5V Logic Supply to ±5V System
• Wide Input Voltage Range: +1.5V to +12V
• Efficient Voltage Conversion (99.9%, typical)
• Excellent Power Efficiency (98%, typical)
• Low Power Consumption: 80 µA (typical) @ VIN = 5V
• Low Cost and Easy to Use
• Only Two External Capacitors Required
• 8-Pin PDIP Package
• Improved ESD Protection (10 kV HBM)
• No External Diode Required for High-Voltage Operation

Applications

• RS-232 Negative Power Supply
• Simple Conversion of +5V to ±5V Supplies
• Voltage Multiplication VOUT = ± n V+
• Negative Supplies for Data Acquisition Systems and Instrumentation