LM2681M6/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2681M6/NOPB is a charge pump DC-DC switching regulator manufactured by Texas Instruments, originally under the National Semiconductor brand. It operates with an input voltage range of 2.5V to 5.5V and provides a single fixed positive output configured as either 2Vin or Vin/2. The device delivers a maximum output current of 20mA at a switching frequency of 80kHz. It utilizes a SOT-23-6 surface-mount package and supports junction temperatures from -40°C to 85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Charge pump topology for step-up or step-down voltage conversion
• Fixed output configuration selectable between double or half input voltage
• Compact SOT-23-6 surface-mount packaging

Voltage Regulators - DC DC Switching Regulators Applications

• Portable battery-powered devices requiring voltage inversion or doubling
• Low-power embedded systems needing isolated or shifted supply rails
• Space-constrained circuit designs utilizing small footprint regulators

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the manufacturer designation, as Texas Instruments acquired National Semiconductor. Confirm the specific suffix 'M6' indicates the SOT-23-6 package variant. Ensure compatibility with RoHS3 standards if required by your assembly process. Cross-reference datasheets for pinout consistency across legacy and current production batches.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a simple charge pump solution is preferred over inductive converters for low-current applications. The fixed ratio outputs limit flexibility but simplify external component selection. Consider the 20mA current limit and 80kHz frequency when evaluating efficiency and ripple requirements for sensitive analog circuits.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2681 series of charge pump regulators. It serves as a compact alternative to inductor-based boost or buck converters in applications where size and cost are critical constraints. The transition from National Semiconductor to Texas Instruments maintains the core functionality while updating manufacturing processes.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Check for LM2681M6X/NOPB which shares identical electrical specifications but differs in tape-and-reel packaging format. Verify that any substitute maintains the SOT-23-6 footprint and compatible thermal characteristics.