LM2682MM

Voltage Regulators - DC DC Switching Regulators Overview

The LM2682MM is a CMOS charge-pump voltage inverter manufactured by National Semiconductor. It functions as a switched capacitor voltage doubling inverter, capable of converting positive input voltages into corresponding negative outputs. The device operates within an input voltage range of +5.5V maximum and supports ratiometric output configurations. It features a negative output configuration with a fixed output type. The component is designed for surface mount installation in an 8-TSSOP or 8-MSOP package, which has a width of 3.00mm. It is rated for an operating temperature range of -40°C to 85°C (TA).

Voltage Regulators - DC DC Switching Regulators Feature Summary

• CMOS charge-pump technology for efficient voltage inversion
• Ratiometric output capability relative to input voltage
• Surface mount packaging for compact circuit integration

Voltage Regulators - DC DC Switching Regulators Applications

• Negative supply generation for operational amplifiers
• Bias voltage creation for analog signal processing circuits
• Powering components requiring dual polarity supplies from a single positive source

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific manufacturer designation, as the part was originally produced by National Semiconductor and later by Texas Instruments after acquisition. Confirm the exact suffix (e.g., MM vs. MMX) regarding tape-and-reel versus tube packaging if available in current distributor catalogs. Check for obsolete status indicators, as some variants may no longer be actively manufactured. Ensure compatibility with the required 8-TSSOP/MSOP footprint during procurement planning.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a simple, low-component-count solution for generating a negative rail from a positive source is required. Consider the maximum input voltage limit of 5.5V and the current capabilities inherent to charge-pump topologies. Evaluate the thermal performance within the specified -40°C to 85°C ambient temperature range. Compare against alternatives if higher output current or different topology requirements exist.

Voltage Regulators - DC DC Switching Regulators Part Context

The LM2682 belongs to a family of switched-capacitor voltage converters designed for low-power applications. It serves as a complement to other regulators in the series, such as the LM2681, focusing specifically on inversion rather than step-up or buck conversion. These devices are typically used in portable electronics and battery-powered systems where efficiency and space savings are critical.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include the LM2682MM/NOPB variant. Verify pinout and electrical specifications match exactly before substitution.