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7Semi TPS60401 Negative Voltage Generator Module - 1.6-5.5V Input, -VIN Output, 60mA Charge Pump Voltage Inverter for Op-Amp Biasing, LCD Bias, and Analog Embedded Circuits
The 7Semi TPS60401 Negative Voltage Generator Module is a compact, inductor-free charge pump voltage inverter built around the Texas Instruments TPS60401 IC, designed to generate a negative output voltage rail from a positive input supply for analog, sensor, LCD bias, and battery-powered embedded electronics applications where a small negative voltage is required but a full inductor-based switching inverter is impractical due to size, component count, or EMI constraints. The TPS60401 charge pump architecture generates the negative output by switching capacitors between charge and discharge phases without an inductor, producing an unregulated negative output voltage approximately equal to the inverted input voltage - a 3.3V input yields approximately -3.3V output, and a 5V input yields approximately -5V output under light load conditions - across the full 1.6-5.5V input range that covers single-cell Li-ion, 3.3V logic rails, 5V USB and microcontroller supply rails, and 2-cell alkaline or NiMH battery packs.
The 60mA maximum output current capacity covers the negative rail requirements of the majority of op-amp biasing, dual-supply instrumentation amplifier, LCD bias voltage, OLED display bias, MEMS microphone, and analogue sensor supply applications where the negative rail current draw is modest but essential for correct circuit operation. A 3-pin interface covering VIN, GND, and OUT keeps the module connection straightforward for breadboard prototyping, perfboard builds, and PCB integration, with only a small number of external capacitors required beyond the module itself to complete the charge pump filter circuit. The PowerSave mode built into the TPS60401 IC automatically reduces switching activity under light-load conditions, lowering quiescent current consumption and improving battery run-time efficiency in portable and battery-powered instrument builds where the negative rail draws minimal current during standby or low-activity system states. The typical 65uA quiescent current in normal operation is low enough for always-on negative rail generation in energy-conscious IoT sensor nodes, portable instruments, and wearable electronics designs without a meaningful impact on battery life. The inductor-free charge pump design eliminates the magnetic field emissions, physical bulk, and saturation current specification constraints associated with inductor-based negative voltage converters, making the TPS60401 module a space-saving, low-EMI solution for generating negative supply rails in noise-sensitive analogue signal chains and precision measurement circuits.
Key Features
- Charge Pump IC: Texas Instruments TPS60401 charge pump voltage inverter for reliable, inductor-free negative voltage generation from a positive input supply
- Input Voltage Range: 1.6-5.5V covering single-cell Li-ion, 3.3V logic rails, 5V USB and microcontroller supply rails, and 2-cell alkaline and NiMH battery packs
- Output Voltage: Unregulated negative output approximately equal to minus VIN for symmetrical positive-negative supply rail generation from a single positive input
- Maximum Output Current: Up to 60mA for op-amp biasing, dual-supply instrumentation amplifier, LCD and OLED bias, MEMS microphone, and analogue sensor negative supply applications
- Inductor-Free Design: Charge pump switching architecture eliminates inductor component, magnetic field emissions, and saturation current constraints versus inductor-based negative voltage converters
- PowerSave Mode: Automatic light-load switching activity reduction for improved quiescent current efficiency and extended battery run-time in portable and IoT builds
- Typical Quiescent Current: 65uA typical quiescent current for low-impact always-on negative rail generation in energy-conscious battery-powered and IoT sensor designs
- 3-Pin Module Interface: VIN, GND, and OUT connection interface for straightforward breadboard, perfboard, and PCB integration without complex wiring
- Low External Component Count: Only a small number of external capacitors are required beyond the module for complete charge pump filter circuit implementation
- Low EMI: Inductor-free charge pump design reduces magnetic field emissions for use in noise-sensitive analogue signal chains and precision measurement circuits
- Compact Module Format: Space-saving module footprint for integration in size-constrained embedded, portable, and wearable electronics PCB designs
- Broad Application Compatibility: Suitable for op-amp biasing, LCD and OLED bias, MEMS microphone supply, analogue sensor supply, portable instrument, and battery-powered electronics negative rail generation.
Applications
- Op-amp and instrumentation amplifier dual-supply biasing requiring a compact negative voltage rail from a single positive 3.3V or 5V supply without an inductor-based inverter
- LCD and OLED display bias voltage generation requiring a negative supply rail from a 3.3V or 5V microcontroller power bus in space-constrained display driver builds
- MEMS microphone and analogue sensor negative supply generation in battery-powered IoT sensor node builds, where inductor EMI would degrade sensor signal quality
- Portable instrument and handheld test equipment builds requiring a symmetrical plus-minus supply rail from a single-cell Li-ion or 2-cell alkaline battery without a dual-winding transformer
- Wearable electronics and compact embedded builds requiring always-on negative rail generation at 65uA typical quiescent current without a meaningful battery life impact
- Breadboard and prototyping builds requiring a simple 3-pin negative voltage generator module for quick negative supply rail evaluation without a discrete charge pump circuit assembly.
Package Includes:
- 1x7Semi TPS60401 Negative Voltage Generator Module
