MC79L15ACLPR Equivalent & Substitute Parts

Part Overview

The MC79L15ACLPR is a linear voltage regulator IC providing negative fixed -15V output at 100mA in a TO-92-3 through-hole package. Manufactured by Texas Instruments, this part is classified as Last Time Buy, indicating end-of-life status. Finding equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring negative voltage regulation.

Key Parameters

Parameter	Value
Manufacturer Part Number	MC79L15ACLPR
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Configuration	Negative
Output Type	Fixed
Voltage - Output (Fixed)	-15V
Current - Output	100mA
Voltage - Input (Max)	-30V
Voltage Dropout (Max)	1.7V @ 40mA
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

Substitute parts for the MC79L15ACLPR are grouped into two categories based on electrical and mechanical compatibility:

Category 1: Parametric Equivalents (Fixed -15V Output, Through-Hole TO-92-3) These parts maintain identical electrical specifications and package form factor, ensuring direct pin-for-pin replacement capability. Substitution is based on matching the following critical parameters:

Output Configuration: Negative
Output Type: Fixed
Voltage - Output: -15V
Current - Output: 100mA
Mounting Type: Through Hole
Package / Case: TO-92-3

Category 2: Functional Alternative (Adjustable Output, Surface Mount) The TPS7A3001DGNR provides enhanced performance characteristics with adjustable output voltage and higher current capability, but requires different mounting approach and circuit design considerations. This part is suitable when design flexibility and higher performance margins are prioritized.

Parameter Comparison

Parameter	MC79L15ACLPR	MC79L15ACLPRE3	MC79L15ABPG	MC79L15ABPRPG	MC79L15ACPG	MC79L15ACPRPG	TPS7A3001DGNR
Manufacturer	Texas Instruments	Texas Instruments	onsemi	onsemi	onsemi	onsemi	Texas Instruments
Output Configuration	Negative	Negative	Negative	Negative	Negative	Negative	Negative
Output Type	Fixed	Fixed	Fixed	Fixed	Fixed	Fixed	Adjustable
Voltage - Output	-15V	-15V	-15V	-15V	-15V	-15V	-1.18V to -33V
Current - Output	100mA	100mA	100mA	100mA	100mA	100mA	200mA
Voltage - Input (Max)	-30V	-30V	-35V	-35V	-35V	-35V	-35V
Voltage Dropout (Max)	1.7V @ 40mA	1.7V @ 40mA	1.7V @ 40mA	1.7V @ 40mA	1.7V @ 40mA	1.7V @ 40mA	0.6V @ 200mA
PSRR	39dB (120Hz)	39dB (120Hz)	39dB (120Hz)	39dB (120Hz)	39dB (120Hz)	39dB (120Hz)	72dB (120Hz)
Operating Temperature	0°C ~ 125°C	0°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Surface Mount
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	8-HVSSOP
Product Status	Last Time Buy	Last Time Buy	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Same Package): Select from MC79L15ACLPRE3, MC79L15ABPG, MC79L15ABPRPG, MC79L15ACPG, or MC79L15ACPRPG. All onsemi variants (MC79L15ABPG, MC79L15ABPRPG, MC79L15ACPG, MC79L15ACPRPG) offer Active product status, ensuring long-term availability and supply chain stability. These parts are electrically equivalent with identical output voltage, current rating, and protection features. The primary differentiation is operating temperature range and packaging format (bulk vs. cut tape).

For Extended Temperature Range Applications: MC79L15ABPG, MC79L15ABPRPG, MC79L15ACPRPG, and MC79L15ACPREG support -40°C to 125°C operation, compared to 0°C to 125°C for the original part and MC79L15ACLPRE3. These variants are suitable for industrial and automotive environments requiring wider temperature margins.

For Enhanced Performance (Non-Pin-Compatible): The TPS7A3001DGNR is a functional alternative offering superior specifications: 200mA output current (2x the original), 0.6V dropout voltage (lower than 1.7V), 72dB PSRR (higher than 39dB), and adjustable output voltage capability. This part requires surface-mount assembly and circuit redesign but provides performance advantages for new designs or redesigns. Active product status ensures availability.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original part's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can MC79L15ABPG directly replace MC79L15ACLPR in existing designs? A: Yes. Both parts provide -15V fixed negative output at 100mA in TO-92-3 through-hole packages with identical electrical specifications. Pin-for-pin replacement is possible without circuit modification. The primary difference is manufacturer (onsemi vs. Texas Instruments) and product status (Active vs. Last Time Buy).

Q: What is the difference between MC79L15ABPG and MC79L15ACPG? A: Both are onsemi equivalents with identical electrical performance. The difference is packaging format: MC79L15ABPG is supplied in bulk, while MC79L15ACPG is also bulk. MC79L15ABPRPG and MC79L15ACPRPG are cut-tape variants. Operating temperature ranges differ: MC79L15ABPG and MC79L15ABPRPG support -40°C to 125°C, while MC79L15ACPG and MC79L15ACPRPG support 0°C to 125°C.

Q: Why would I choose TPS7A3001DGNR over the MC79L15 variants? A: The TPS7A3001DGNR is suitable for new designs or redesigns requiring higher output current (200mA vs. 100mA), lower dropout voltage (0.6V vs. 1.7V), superior noise rejection (72dB vs. 39dB PSRR), or adjustable output voltage. This part requires surface-mount assembly and circuit redesign, making it unsuitable for direct replacement in existing through-hole designs.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the original MC79L15ACLPR regulatory requirements.

Q: What is the significance of "Last Time Buy" status for MC79L15ACLPR? A: Last Time Buy indicates the part is end-of-life. Texas Instruments will no longer manufacture this part after a specified date. Selecting Active-status alternatives (onsemi MC79L15 variants or TPS7A3001DGNR) ensures long-term supply chain continuity and design sustainability.

Q: Can I use MC79L15ACLPRE3 as a long-term replacement? A: MC79L15ACLPRE3 is also Last Time Buy status, indicating it will eventually reach end-of-life. For long-term designs, select Active-status alternatives such as onsemi MC79L15ABPRPG, MC79L15ACPRPG, or TPS7A3001DGNR.

Q: What are the key parameters that determine substitution compatibility? A: For through-hole direct replacement: negative output configuration, fixed -15V output, 100mA current rating, TO-92-3 package, and through-hole mounting. For functional alternatives: negative output configuration and compatible current/voltage specifications are primary criteria, though package and mounting type may differ.

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