LM2611AMF Equivalent & Substitute Parts

Part Overview

The LM2611AMF is a Cuk switching regulator IC manufactured by Texas Instruments, designed for negative adjustable voltage regulation with 1.2A output current capability. This component operates across a 2.7V to 14V input range and delivers adjustable negative output voltage from -1.23V to -32V. The device is packaged in SC-74A (SOT-753) surface mount configuration with a switching frequency of 1.4MHz.

The LM2611AMF is designated as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications currently utilizing this component.

Substiute Parts

LM2611AMF

Texas InstrumentsIn Stock: 2519LM2611AMF Datasheet

Current PartRFQ

LM2611AMF/NOPB

Texas InstrumentsIn Stock: 18117LM2611AMF/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM2611AMF is determined by strict alignment across the following critical parameters:

• Topology: Cuk switching regulator architecture
• Output Configuration: Negative voltage regulation
• Output Type: Adjustable voltage capability
• Voltage Range: Input 2.7V to 14V; Output -1.23V to -32V
• Current Rating: 1.2A output current
• Switching Frequency: 1.4MHz
• Package: SC-74A (SOT-753) surface mount
• Operating Temperature Range: -40°C to 125°C
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The LM2611AMF/NOPB qualifies as a direct substitute based on identical electrical specifications, package configuration, and compliance certifications. The primary distinction is product status: the base LM2611AMF is Last Time Buy, while the LM2611AMF/NOPB variant maintains Active status with significantly higher inventory availability.

Parameter Comparison

Engineering Selection Recommendations

The LM2611AMF/NOPB is the direct substitute for the LM2611AMF. Both variants maintain identical electrical performance, thermal characteristics, and regulatory compliance status (ROHS3 Compliant, REACH Unaffected). The LM2611AMF/NOPB is recommended for new procurement due to its Active product status and substantially higher inventory availability (18100 units versus 2500 units). Both parts are suitable for applications requiring negative adjustable voltage regulation within the specified input and output ranges.

Frequently Asked Questions (FAQ)

Q: Can the LM2611AMF/NOPB be used as a direct replacement for the LM2611AMF?

A: Yes. Both parts are electrically and mechanically identical, with matching voltage specifications, current ratings, switching frequency, package configuration, and operating temperature range. The primary difference is product lifecycle status and inventory levels.

Q: What does the "/NOPB" designation indicate?

A: The "/NOPB" suffix indicates the part is supplied without plumbum (lead-free), consistent with ROHS3 compliance requirements. Both the LM2611AMF and LM2611AMF/NOPB meet ROHS3 standards.

Q: Are there any thermal or performance differences between these variants?

A: No. Both variants operate at identical switching frequency (1.4MHz), deliver the same output current (1.2A), and maintain the same operating temperature range (-40°C to 125°C).

Q: Is the SC-74A (SOT-753) package compatible with existing PCB layouts designed for the LM2611AMF?

A: Yes. Both parts use the identical SC-74A (SOT-753) surface mount package, ensuring pin-for-pin compatibility and direct PCB layout compatibility.

Q: What is the significance of the Last Time Buy status for the LM2611AMF?

A: Last Time Buy status indicates Texas Instruments has discontinued production of the base LM2611AMF variant. The LM2611AMF/NOPB remains in active production and is the recommended part for ongoing designs and procurement.