LM2682M/NOPB Equivalent & Substitute Parts

Part Overview

The LM2682M/NOPB is a charge pump switching regulator IC manufactured by Texas Instruments, designed to generate negative fixed output voltages from positive input supplies. This device operates as a negative voltage inverter with a fixed output configuration and delivers 10mA output current. The product is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

LM2682M/NOPB

Texas InstrumentsIn Stock: 1156LM2682M/NOPB Datasheet

Current PartRFQ

TC682EOA

Microchip TechnologyIn Stock: 2129TC682EOA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM2682M/NOPB is determined by strict alignment of the following electrical and mechanical parameters:

• Topology: Charge pump architecture for negative voltage generation
• Output Configuration: Negative fixed output voltage
• Package: 8-SOIC (0.154", 3.90mm Width) surface mount
• Output Current: 10mA minimum capability
• Input Voltage Range: Compatibility within 2V to 5.5V operating window
• Operating Temperature: -40°C to 85°C range
• Compliance: ROHS3 and REACH compliance status

The TC682EOA from Microchip Technology meets these substitution criteria as an active product with identical package geometry, equivalent output current rating, overlapping input voltage specifications, and matching compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The TC682EOA is the manufacturer-recommended substitute for the LM2682M/NOPB. Both devices share identical package geometry, equivalent output current specifications, and matching compliance certifications (ROHS3, REACH Unaffected). The TC682EOA maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete LM2682M/NOPB.

The TC682EOA operates within the same temperature range and maintains compatibility with the 8-SOIC surface mount footprint. The minimum input voltage specification of the TC682EOA (2.4V) is slightly higher than the LM2682M/NOPB (2V), which must be evaluated against specific circuit requirements. The switching frequency difference (12kHz versus 6kHz) reflects design optimization in the Microchip device and does not preclude functional substitution when output current and voltage specifications are met.

Frequently Asked Questions (FAQ)

Q: Can the TC682EOA directly replace the LM2682M/NOPB in existing designs?

A: The TC682EOA is pin-compatible and functionally equivalent for applications where the input voltage remains at or above 2.4V. The identical 8-SOIC package and matching output current rating support direct PCB substitution. Verify that your circuit's minimum input voltage specification does not fall below 2.4V.

Q: What is the significance of the different switching frequencies (6kHz vs. 12kHz)?

A: The switching frequency difference reflects internal design variations between manufacturers. Both frequencies are within typical charge pump operating ranges and do not affect the fundamental substitution relationship. Output voltage and current specifications remain equivalent.

Q: Why is the LM2682M/NOPB classified as obsolete?

A: Obsolete status indicates that Texas Instruments has discontinued production and support for this device. The TC682EOA, maintained as an active product by Microchip Technology, provides equivalent functionality with ongoing availability and manufacturer support.

Q: Are there compliance differences between the two devices?

A: Both devices carry identical ROHS3 compliance and REACH Unaffected status, ensuring equivalent environmental and regulatory compliance for procurement and deployment.

Q: What output voltage configurations are available?

A: The LM2682M/NOPB supports -Vin or -2Vin output configurations. The TC682EOA is fixed at -2Vin output. Confirm that your application requirements align with the -2Vin fixed output specification of the substitute device.