CAT661EVA-GT3

Overview

The CAT661EVA-GT3 is a high-frequency CMOS charge pump voltage converter manufactured by onsemi. It functions as an inverter and doubler, providing a single positive or negative fixed output with a maximum current capability of 100 mA. The device is housed in an 8-SOIC package with a width of 3.90 mm. Designed for efficient voltage conversion, it supports applications requiring stable power supply rails derived from standard logic levels.

Feature Summary

• Provides both positive and negative voltage outputs from a single input source
• Capable of delivering up to 100 mA of output current
• Operates as a high-frequency CMOS charge pump for efficient inversion and doubling

Applications

• Biasing circuits requiring dual polarity supplies
• LCD bias voltage generation
• RS-232 interface level shifting
• General-purpose voltage inversion in low-power systems

Procurement Notes

Verify the specific suffix 'EVA' against the manufacturer's latest datasheet to confirm pinout and electrical characteristics, as suffixes often denote package type or temperature range variations. Ensure the application requires a fixed output configuration rather than adjustable variants. Cross-reference the 8-SOIC footprint dimensions with PCB design guidelines to ensure mechanical compatibility during integration.

Selection Notes

Select this component when a compact solution for generating inverted or doubled voltages is needed without external inductors. The 100 mA output current suits moderate load requirements. Consider the operating frequency and efficiency trade-offs compared to inductive converters if higher currents are anticipated. Verify that the fixed output voltage aligns with the target circuit requirements, as adjustable versions may be necessary for non-standard voltages.

Part Context

This part belongs to onsemi's family of CMOS charge pump voltage converters. These devices are designed to replace bulky inductive switching regulators in space-constrained applications. The CAT661 series specifically offers integrated switching elements and capacitors control logic, simplifying the design process for voltage inversion and multiplication tasks in consumer and industrial electronics.

Replacement Considerations

Check for direct pin-to-pin replacements within the CAT661 series or similar charge pump ICs from other manufacturers such as Maxim Integrated (now Analog Devices) or Texas Instruments. Ensure equivalent output current capabilities and package dimensions match the existing board layout before substitution.