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 onboard 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 the ground (with pin 1 open). The TC7660S is available in 8-pin PDIP and 8-pin Small Outline (SOIC) packages in commercial and extended temperature ranges.
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
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
- Improved ESD Protection (10 kV HBM)
Package Includes:
1 x TC7660SCOA-MICROCHIP-DC/DC Inductorless Adjustable Inverter, 1.5 V to 12 V in, -12 V to -1.5 V/20 mA out, SOIC-8
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