LM79L05ACMX Equivalent & Substitute Parts

Part Overview

The LM79L05ACMX is a linear voltage regulator IC from Texas Instruments designed to provide a fixed negative output of -5V at 100mA. This device is classified as a negative fixed output regulator within the Power Management (PMIC) category and is packaged in an 8-SOIC surface mount configuration. The LM79L05ACMX is marked as "Not For New Designs," indicating it is a legacy component. Equivalent and substitute parts are necessary for applications requiring continued supply, design flexibility, or when the primary part becomes unavailable.

Substiute Parts

LM79L05ACMX

Texas InstrumentsIn Stock: 60207LM79L05ACMX Datasheet

Current PartRFQ

LM79L05ACMX/NOPB

Texas InstrumentsIn Stock: 16294LM79L05ACMX/NOPB Datasheet

Parametric EquivalentRFQ

L79L05ABD13TR

STMicroelectronicsIn Stock: 16597L79L05ABD13TR Datasheet

MFR RecommendedRFQ

L79L05ACD13TR

STMicroelectronicsIn Stock: 78520L79L05ACD13TR Datasheet

MFR RecommendedRFQ

MC79L05ABDR2G

onsemiIn Stock: 3772MC79L05ABDR2G Datasheet

MFR RecommendedRFQ

MC79L05ACDR2G

onsemiIn Stock: 3780MC79L05ACDR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LM79L05ACMX is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Output Configuration: Negative
• Output Type: Fixed
• Voltage - Output (Min/Fixed): -5V
• Current - Output: 100mA
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

All substitute parts listed maintain these core parameters, ensuring functional compatibility in applications designed for the LM79L05ACMX. Variations in secondary parameters such as input voltage rating, quiescent current, operating temperature range, and RoHS compliance status are noted but do not prevent substitution when the critical parameters align.

Parameter Comparison

Engineering Selection Recommendations

LM79L05ACMX/NOPB (Texas Instruments) This part is the direct parametric equivalent from Texas Instruments with identical electrical specifications to the LM79L05ACMX. The primary distinction is RoHS3 compliance and active product status. This is the preferred substitute when maintaining Texas Instruments sourcing is required and RoHS compliance is necessary.

L79L05ACD13TR (STMicroelectronics) This STMicroelectronics part maintains all critical substitution parameters with extended operating temperature range (0°C ~ 125°C) and RoHS3 compliance. Input voltage rating is reduced to -30V compared to the original -35V specification. This part is suitable for applications where the lower input voltage rating is acceptable and extended temperature operation is beneficial.

L79L05ABD13TR (STMicroelectronics) Similar to the L79L05ACD13TR with identical electrical performance and RoHS3 compliance. Operating temperature range extends to -40°C ~ 125°C, providing the widest temperature coverage among all substitutes. Input voltage rating is -30V. This part is appropriate for applications requiring extended low-temperature operation.

MC79L05ACDR2G (onsemi) This onsemi part provides all critical substitution parameters with RoHS3 compliance and active product status. Operating temperature range is 0°C ~ 125°C with -30V input voltage rating. Packaging is Cut Tape (CT) & Digi-Reel®. This part is suitable for high-volume applications requiring standard temperature operation.

MC79L05ABDR2G (onsemi) This onsemi part offers identical electrical performance to MC79L05ACDR2G with extended low-temperature operation (-40°C ~ 125°C). Packaging is Tape & Reel (TR). This part is appropriate for applications requiring the widest temperature range with onsemi sourcing.

Frequently Asked Questions (FAQ)

Q: Can I substitute the LM79L05ACMX with any of these parts directly? A: Yes. All listed substitute parts maintain the critical electrical and mechanical parameters: -5V fixed negative output, 100mA output current, and 8-SOIC surface mount package. Direct pin-for-pin substitution is possible in applications designed for the LM79L05ACMX.

Q: What is the difference between the LM79L05ACMX and LM79L05ACMX/NOPB? A: The LM79L05ACMX/NOPB is the same part with RoHS3 compliance and active product status. Electrical specifications are identical. The "/NOPB" designation indicates "No Lead (Pb)" and represents the RoHS-compliant version.

Q: Why do some substitutes have a lower maximum input voltage (-30V vs -35V)? A: The STMicroelectronics and onsemi parts specify -30V maximum input voltage compared to the original -35V. This difference does not prevent substitution if your application operates within the -30V limit. Verify your circuit's input voltage range before selection.

Q: Which substitute offers the widest operating temperature range? A: Both L79L05ABD13TR and MC79L05ABDR2G provide -40°C ~ 125°C operating temperature range, the widest among all substitutes. The original LM79L05ACMX operates only to 70°C maximum.

Q: Are all substitutes RoHS compliant? A: All listed substitutes are RoHS3 compliant. The original LM79L05ACMX is RoHS non-compliant. If RoHS compliance is required for your application, any of the listed substitutes is acceptable.

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging? A: Both are surface mount tape packaging formats suitable for automated assembly. Cut Tape (CT) & Digi-Reel® is typically used for smaller quantities, while Tape & Reel (TR) is standard for high-volume production. Functionality is identical; selection depends on procurement volume and assembly equipment compatibility.

Q: Can I use these substitutes in new designs? A: Yes. All substitute parts have "Active" product status, making them suitable for new designs. The original LM79L05ACMX is marked "Not For New Designs" and should not be used in new applications.

Q: What is the significance of the quiescent current difference (6 mA vs 5.5 mA)? A: The STMicroelectronics and onsemi parts specify 5.5 mA quiescent current compared to 6 mA for the original part. This represents a minor reduction in standby power consumption and does not affect functional compatibility.