MC79L05ACLP Equivalent & Substitute Parts

Part Overview

The MC79L05ACLP is a linear voltage regulator IC from Texas Instruments designed to provide a fixed negative output of -5V at 100mA. This through-hole TO-92-3 packaged component is classified as Last Time Buy, indicating limited future availability. Finding equivalent and substitute parts is necessary to ensure design continuity and long-term supply chain reliability for applications requiring negative voltage regulation.

Key Parameters

Parameter	MC79L05ACLP
Manufacturer	Texas Instruments
Output Configuration	Negative
Output Type	Fixed
Voltage - Output (Min/Fixed)	-5V
Current - Output	100mA
Voltage - Input (Max)	-20V
Voltage Dropout (Max)	1.7V @ 40mA
PSRR	49dB (120Hz)
Protection Features	Over Temperature, Short Circuit
Operating Temperature	0°C ~ 125°C
Mounting Type	Through Hole
Package / Case	TO-226-3, TO-92-3 (TO-226AA)
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution for the MC79L05ACLP is determined by the following critical parameters:

Output Configuration & Type: Negative fixed output at -5V
Current Rating: 100mA output capability
Voltage Input Range: Maximum input voltage tolerance
Package Type: Through-hole TO-92-3 form factor for direct PCB compatibility
Protection Features: Over temperature and short circuit protection
Compliance: ROHS3 compliance and REACH unaffected status

Substitute parts are grouped into two categories:

Direct Equivalents (Same Package, Same Output Specifications): Parts maintaining identical TO-92-3 through-hole packaging with fixed -5V output at 100mA. These include LM79L05ACZ/NOPB, L79L05ACZ, MC79L05ABPRAG, and MC79L05ACPG.

Functional Alternative (Different Package, Enhanced Specifications): TPS7A3001DGNR provides negative voltage regulation with adjustable output and higher current capability (200mA) but uses surface-mount 8-HVSSOP packaging, requiring PCB redesign.

Parameter Comparison

Parameter	MC79L05ACLP	LM79L05ACZ/NOPB	L79L05ACZ	MC79L05ABPRAG	MC79L05ACPG	TPS7A3001DGNR
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	onsemi	onsemi	Texas Instruments
Output Configuration	Negative	Negative	Negative	Negative	Negative	Negative
Output Type	Fixed	Fixed	Fixed	Fixed	Fixed	Adjustable
Voltage - Output (Min/Fixed)	-5V	-5V	-5V	-5V	-5V	-1.18V to -33V
Current - Output	100mA	100mA	100mA	100mA	100mA	200mA
Voltage - Input (Max)	-20V	-35V	-30V	-30V	-30V	-35V
Voltage Dropout (Max)	1.7V @ 40mA	Not specified	Not specified	1.7V @ 40mA (Typ)	1.7V @ 40mA (Typ)	0.6V @ 200mA
PSRR	49dB (120Hz)	50dB (120Hz)	49dB (120Hz)	49dB (120Hz)	49dB (120Hz)	72dB (120Hz)
Protection Features	Over Temperature, Short Circuit	Over Temperature, Short Circuit	Over Temperature, Short Circuit	Over Temperature, Short Circuit	Over Temperature, Short Circuit	Over Current, Over Temperature
Operating Temperature	0°C ~ 125°C	0°C ~ 70°C	0°C ~ 125°C	-40°C ~ 125°C	0°C ~ 125°C	-40°C ~ 125°C
Mounting Type	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 (TO-226)	TO-92 (TO-226)	8-HVSSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Last Time Buy	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (Recommended for Most Applications)

Select LM79L05ACZ/NOPB, L79L05ACZ, MC79L05ABPRAG, or MC79L05ACPG. All maintain identical TO-92-3 through-hole packaging and fixed -5V, 100mA output specifications. These parts are in Active product status, ensuring long-term availability. All are ROHS3 compliant and REACH unaffected.

LM79L05ACZ/NOPB (Texas Instruments): Maintains manufacturer continuity with MC79L05ACLP. Operating temperature range 0°C ~ 70°C. 2200 units in stock.
L79L05ACZ (STMicroelectronics): Extends operating temperature to 0°C ~ 125°C, matching the main part. 52474 units in stock, providing superior supply availability.
MC79L05ABPRAG (onsemi): Extends operating temperature to -40°C ~ 125°C for wider environmental applications. 2300 units in stock.
MC79L05ACPG (onsemi): Maintains 0°C ~ 125°C operating range. 3621 units in stock.

For Enhanced Performance with PCB Redesign

TPS7A3001DGNR (Texas Instruments) offers adjustable output voltage (-1.18V to -33V), doubled current capacity (200mA), improved dropout voltage (0.6V @ 200mA), and superior PSRR (72dB). Requires surface-mount PCB layout modification. 48662 units in stock. Suitable for new designs or redesign opportunities.

Frequently Asked Questions (FAQ)

Q: Can I directly replace MC79L05ACLP with LM79L05ACZ/NOPB on my existing PCB?

A: Yes. Both parts use identical TO-92-3 through-hole packaging with the same pin configuration. Output specifications (-5V, 100mA) are identical. No PCB modifications are required. Verify your operating temperature requirement does not exceed 70°C, as LM79L05ACZ/NOPB is rated to 70°C versus MC79L05ACLP at 125°C.

Q: What is the difference between MC79L05ABPRAG and MC79L05ACPG?

A: Both are onsemi MC79L05 variants in TO-92-3 packaging with identical electrical specifications. The primary difference is operating temperature range: MC79L05ABPRAG operates -40°C ~ 125°C, while MC79L05ACPG operates 0°C ~ 125°C. Select based on your application's minimum operating temperature requirement.

Q: Why would I choose TPS7A3001DGNR over the direct equivalents?

A: TPS7A3001DGNR provides adjustable output voltage, doubled current capacity (200mA), and superior noise performance (72dB PSRR). However, it requires surface-mount 8-HVSSOP packaging, necessitating PCB redesign. Use this part only for new designs or when redesign is feasible and performance benefits are required.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the compliance status of MC79L05ACLP.

Q: Which substitute has the best supply availability?

A: L79L05ACZ (STMicroelectronics) has the highest inventory at 52474 units in stock, providing superior supply security for long-term production requirements.

Q: Can I use these substitutes interchangeably in my design?

A: Direct equivalents (LM79L05ACZ/NOPB, L79L05ACZ, MC79L05ABPRAG, MC79L05ACPG) are pin-compatible and functionally interchangeable for applications within their specified operating temperature ranges. Verify your circuit's maximum input voltage does not exceed the substitute's maximum input rating. TPS7A3001DGNR requires circuit redesign due to different packaging and adjustable output configuration.

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