Boardoza TC7660S Negative Doubler Breakout Board

The Boardoza TC7660S Negative Doubler Breakout Board is a compact voltage conversion solution based on the TC7660S charge pump IC. It is designed to generate a stable negative voltage (-VOUT) and a doubled negative voltage (-2VOUT) from a positive input supply without requiring inductors.

Using a switched-capacitor voltage converter architecture, this board efficiently inverts and doubles the input voltage, making it ideal for low-current precision analog applications. It is especially well-suited for powering operational amplifiers, sensor signal conditioning circuits, and instrumentation systems where a clean and stable negative supply is required. With a typical output capability of up to 10 mA, it is optimized for reference and low-power analog designs rather than high-current loads.

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Front Side	Back Side

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Key Features

• Negative Voltage Generation: Converts a single positive supply into stable negative voltage outputs.
• Dual Output Capability: Provides both -VOUT and -2VOUT options for flexible circuit design.
• High Efficiency Charge Pump: Achieves very high efficiency under light load conditions.
• Low Power Consumption: Optimized for precision, low-current applications.
• Precision Focused Design: Ideal for clean and stable reference voltage generation.

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Technical Specifications

Model: TC7660S-NegativeDoubler
Manufacturer: Boardoza
Manufacturer IC: Microchip Technology Inc.
Functions: Negative voltage regulator
Input Voltage: 1.5 V – 12 V
Voltage Input Type: 2.50 mm pin header
Output Current: 10 mA
Conversion Type: Switched-capacitor charge pump
Oscillator Frequency: Between 10 kHz to 45 kHz
Efficiency: Up to 98–99% (typical, light load)
Operating Temperature: -40 °C to +80 °C
Board Dimensions: 40 mm × 20 mm

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Board Pinout

( J1 ) Power Input Connector

Pin Number	Pin Name	Description
1	VIN	Positive input voltage (1.5V – 12V)
2	GND	Ground

( J2 ) Output Connector

Pin Number	Pin Name	Description
1	-2VOUT	Negative output, twice the input voltage
2	GND	Ground
3	-VOUT	Negative output, equal to input voltage

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Board Dimensions

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Step Files

Boardoza TC7660S-NegativeDoubler.step

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Datasheet

TC7660S Datasheet.pdf

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Version History

• V1.0.0 – Initial Release

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Support

• If you have any questions or need support, please contact [email protected]

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License

Hardware Design

All hardware design files are licensed under Creative Commons Attribution-ShareAlike 4.0 International License.