MC79L15ACLP Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MC79L15ACLP is a linear voltage regulator IC manufactured by Texas Instruments, designed for negative fixed output applications. This Through Hole mounted device delivers -15V at 100mA output current with integrated over-temperature and short-circuit protection. The part is classified as Last Time Buy status, indicating limited future availability. Identifying equivalent and substitute parts ensures design continuity and supply chain resilience for applications requiring negative voltage regulation in the -15V range.

Key Parameters

Parameter	MC79L15ACLP
Manufacturer	Texas Instruments
Output Configuration	Negative
Output Type	Fixed
Voltage - Output (Min/Fixed)	-15V
Voltage - Input (Max)	-30V
Current - Output	100mA
Voltage Dropout (Max)	1.7V @ 40mA
PSRR	39dB (120Hz)
Protection Features	Over Temperature, Short Circuit
Operating Temperature	0°C ~ 125°C
Mounting Type	Through Hole
Package / Case	TO-92-3 (TO-226AA)
Product Status	Last Time Buy
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the MC79L15ACLP is determined by the following critical parameters:

Output Voltage: -15V fixed output is the primary functional requirement
Output Current: 100mA minimum capability
Voltage Input Range: Maximum -30V input tolerance
Mounting Type: Through Hole configuration for PCB compatibility
Package Type: TO-92-3 form factor for mechanical fit
Protection Features: Over-temperature and short-circuit protection
Operating Temperature Range: 0°C to 125°C minimum

Substitute parts are grouped into two categories:

Category 1 - Parametric Equivalents (Identical Specifications) Parts with identical electrical specifications, output voltage, current rating, and Through Hole TO-92-3 packaging. These provide direct functional replacement with equivalent performance characteristics.

Category 2 - Functional Alternatives (Enhanced Specifications) Parts with superior electrical performance, higher current capability, or adjustable output voltage that can fulfill the -15V regulation requirement. These offer design flexibility but require circuit evaluation for compatibility.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Package Type	Mounting Type	Product Status	Operating Temp
MC79L15ACLP	Texas Instruments	-15V	100mA	-30V	1.7V @ 40mA	TO-92-3	Through Hole	Last Time Buy	0°C ~ 125°C
MC79L15ACLPE3	Texas Instruments	-15V	100mA	-30V	1.7V @ 40mA	TO-92-3	Through Hole	Last Time Buy	0°C ~ 125°C
MC79L15ABPG	onsemi	-15V	100mA	-35V	1.7V @ 40mA	TO-92-3	Through Hole	Active	-40°C ~ 125°C
MC79L15ABPRPG	onsemi	-15V	100mA	-35V	1.7V @ 40mA	TO-92-3	Through Hole	Active	-40°C ~ 125°C
MC79L15ACPG	onsemi	-15V	100mA	-35V	1.7V @ 40mA	TO-92-3	Through Hole	Active	0°C ~ 125°C
MC79L15ACPRAG	onsemi	-15V	100mA	-35V	1.7V @ 40mA	TO-92-3	Through Hole	Active	0°C ~ 125°C
MC79L15ACPREG	onsemi	-15V	100mA	-35V	1.7V @ 40mA	TO-92-3	Through Hole	Active	0°C ~ 125°C
MC79L15ACPRPG	onsemi	-15V	100mA	-35V	1.7V @ 40mA	TO-92-3	Through Hole	Active	0°C ~ 125°C
TPS7A3001DGNR	Texas Instruments	-1.18V to -33V	200mA	-35V	0.6V @ 200mA	8-HVSSOP	Surface Mount	Active	-40°C ~ 125°C

Engineering Selection Recommendations

For Direct Replacement (Last Time Buy Mitigation)

MC79L15ACLPE3 is the primary parametric equivalent, offering identical electrical specifications and Through Hole TO-92-3 packaging. Both Texas Instruments parts share the same output voltage, current rating, and protection features. Selection between MC79L15ACLP and MC79L15ACLPE3 depends on packaging preference (Bulk vs. alternative packaging designation).

For Active Product Status with Extended Availability

onsemi manufactures multiple MC79L15 variants in Active product status, ensuring long-term supply continuity. MC79L15ACPG, MC79L15ACPRAG, MC79L15ACPREG, and MC79L15ACPRPG all deliver -15V at 100mA with identical electrical performance. These parts feature expanded input voltage tolerance (-35V maximum vs. -30V) and extended lower operating temperature range (-40°C vs. 0°C minimum). Packaging variants include Bulk and Cut Tape (CT) options. MC79L15ABPG and MC79L15ABPRPG from onsemi provide equivalent specifications with identical performance characteristics.

For Enhanced Performance Applications

TPS7A3001DGNR offers superior electrical performance with adjustable output voltage range (-1.18V to -33V), higher output current (200mA), lower dropout voltage (0.6V @ 200mA), and higher PSRR (72dB). This Surface Mount device in 8-HVSSOP package requires PCB redesign and is suitable only for applications where the adjustable output voltage and increased current capability provide functional advantage. Active product status ensures availability.

Compliance and Certification

All listed parts maintain ROHS3 compliance and REACH Unaffected status, meeting environmental and regulatory requirements equivalent to the original MC79L15ACLP.

Frequently Asked Questions (FAQ)

Q: Can MC79L15ACLPE3 replace MC79L15ACLP directly?

A: Yes. MC79L15ACLPE3 is a parametric equivalent with identical output voltage (-15V), output current (100mA), dropout voltage (1.7V @ 40mA), protection features, and Through Hole TO-92-3 packaging. Both are Texas Instruments products with equivalent electrical performance.

Q: What is the difference between Texas Instruments and onsemi MC79L15 variants?

A: Texas Instruments MC79L15ACLP and MC79L15ACLPE3 are Last Time Buy products with -30V maximum input voltage and 0°C to 125°C operating range. onsemi MC79L15 variants (ABPG, ABPRPG, ACPG, ACPRAG, ACPREG, ACPRPG) are Active status with -35V maximum input voltage and extended temperature range (-40°C to 125°C for ABPG/ABPRPG variants). All deliver identical -15V output at 100mA.

Q: Can I use TPS7A3001DGNR as a substitute?

A: TPS7A3001DGNR is a functional alternative with adjustable output voltage, higher current capability (200mA), and superior performance metrics. However, it requires Surface Mount assembly on 8-HVSSOP package versus Through Hole TO-92-3. Circuit redesign is necessary. Use only if application requirements justify the package change and adjustable voltage capability is beneficial.

Q: What packaging options are available?

A: MC79L15ACLP and equivalents use Through Hole TO-92-3 (TO-226AA) package. onsemi variants offer Bulk packaging (MC79L15ACPG, MC79L15ABPG) and Cut Tape (CT) packaging (MC79L15ACPRAG, MC79L15ACPREG, MC79L15ACPRPG, MC79L15ABPRPG). TPS7A3001DGNR uses Surface Mount 8-HVSSOP package with Cut Tape and Digi-Reel packaging options.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH Unaffected status, meeting environmental regulations equivalent to MC79L15ACLP.

Q: Which substitute offers the best long-term availability?

A: onsemi MC79L15 variants (ABPG, ABPRPG, ACPG, ACPRAG, ACPREG, ACPRPG) are classified as Active product status, ensuring continued manufacturing and supply. These are recommended for new designs requiring long-term component availability beyond the Last Time Buy status of the original MC79L15ACLP.

Q: What is the operating temperature difference between substitutes?

A: MC79L15ACLP and MC79L15ACLPE3 operate 0°C to 125°C. onsemi MC79L15ABPG and MC79L15ABPRPG extend the lower limit to -40°C. onsemi MC79L15ACPG, MC79L15ACPRAG, MC79L15ACPREG, and MC79L15ACPRPG maintain 0°C to 125°C range. TPS7A3001DGNR operates -40°C to 125°C. Select based on application temperature requirements.

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