SP6660EU-L

Overview

The Sipex SP6660EU-L is a CMOS DC-DC monolithic voltage converter housed in an 8-MSOP surface-mount package. It functions as either a voltage inverter or a positive voltage doubler, enabling board-level power conversion for battery-operated systems. The device supports input voltages from +1.5V to +4.25V. In inverter mode, it generates outputs ranging from -1.5V to -4.25V. As a voltage doubler, it can provide up to +8.0V output at 100mA from a +4.25V input. The component features a selectable oscillator frequency of 10kHz or 80kHz and maintains high efficiency exceeding 90% across most load ranges.

Feature Summary

• Configurable topology supporting both voltage inversion and positive voltage doubling operations
• Selectable internal oscillator frequencies of 10 kHz and 80 kHz for flexible switching control
• High power efficiency greater than 90% with typical operating current of 400µA
• Capable of delivering 200mA output current while maintaining low output resistance

Applications

• Operational amplifier and interface power supplies
• Medical instruments requiring isolated or inverted rails
• Handheld and laptop computers utilizing lithium-ion batteries

Procurement Notes

Verify the specific manufacturer lineage, as the SP6660 series originated with Sipex and was later acquired by Exar before transitioning to MaxLinear. Confirm that the 'EU' suffix corresponds to the MSOP package variant listed in local specifications. Ensure compatibility with existing PCB footprints designed for the 8-TSSOP/8-MSOP form factor during integration.

Selection Notes

Select this component when designing circuits requiring negative voltage rails or doubled positive voltages from a single low-voltage source. The 10kHz/80kHz selectable frequency allows optimization between component size and noise performance. Ensure the application load does not exceed the 200mA continuous current rating to maintain specified efficiency levels and thermal stability within the operating temperature range.

Part Context

The SP6660 series serves as a pin-compatible upgrade to legacy devices like the ICL7660 and standard 660 industry components. It offers a smaller footprint through the 8-pin µSOIC/MSOP package while providing higher current capabilities. The device is part of a broader family including variants such as the SP6660CN and SP6661EN, which share similar core functionalities but differ in packaging and specific electrical characteristics.

Replacement Considerations

Direct replacements include the Exar SP6660CN and other Sipex SP6660 variants. These parts share identical functionality and pinouts. Verify that substitute packages match the 8-MSOP dimensions to ensure mechanical fit without modifying the existing board layout.