LM2686MTC/NOPB

Overview

The LM2686MTC/NOPB is a switched capacitor regulator manufactured by Texas Instruments, formerly National Semiconductor. It operates within an input voltage range of 2.85 V to 6.5 V, with a nominal input of 3.6 V. The device features a maximum switching frequency of 180 kHz and functions as a single-channel regulator. It is housed in a 14-pin TSSOP package (PDSO14) with a shrink pitch small outline form factor. The component supports commercial certification and operates across a temperature range of -40 °C to 85 °C.

Feature Summary

• Integrated switched capacitor regulation topology for efficient voltage conversion without external inductors.
• Compact 14-pin Thin Shrink Small Outline (TSSOP) package design suitable for space-constrained applications.
• Operates over a wide industrial temperature range from -40 °C to +85 °C.

Applications

• Portable electronic devices requiring compact power management solutions
• Battery-powered systems utilizing switched capacitor topologies
• General purpose voltage regulation in consumer electronics

Procurement Notes

Verify the manufacturer origin, as Rochester Electronics lists this part while Texas Instruments is the original designer. Confirm the specific suffix NOPB indicates lead-free compliance and RoHS status. Ensure the TSSOP-14 package matches your PCB footprint requirements. Check for any obsolescence notices or lifecycle status changes from the current distributor or manufacturer channels before finalizing procurement plans.

Selection Notes

Select this component when an inductor-less voltage regulation solution is required for low-to-medium power applications. The 180 kHz switching frequency allows for smaller external capacitors compared to lower-frequency alternatives. Consider the 2.85 V minimum input voltage constraint against your system's battery discharge curve. The TSSOP-14 package offers thermal performance benefits over larger packages but requires adequate PCB copper area for heat dissipation.

Part Context

This component belongs to the LM268x family of switched capacitor regulators developed by National Semiconductor, now part of Texas Instruments. These devices are designed to replace bulky inductive converters in portable applications. The LM2686 specifically targets applications needing regulated output from varying input sources without magnetic components. It complements other PMIC offerings like the LM2682 and LM2636 series.

Replacement Considerations

Direct substitutes may include the LM2686MM/NOPB if a different package variant is acceptable. Cross-reference with LM2682 series parts for similar switched capacitor functionality, though pinouts and electrical characteristics differ. Verify compatibility with LM2686 variants from alternative distributors ensuring identical TSSOP-14 packaging and electrical specifications.