AN79L18 Equivalent & Substitute Parts

Part Overview

The AN79L18 is a linear voltage regulator IC from Panasonic Electronic Components designed to provide a fixed negative output of -18V at 100mA. This device is classified as a negative fixed output regulator within the Power Management (PMIC) category and is packaged in a 3-SSIP (TO-226-3/TO-92-3) configuration suitable for through-hole mounting applications.

The AN79L18 is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability for production, and support ongoing maintenance of systems utilizing this regulator.

Substiute Parts

AN79L18

Panasonic Electronic ComponentsIn Stock: 3141AN79L18 Datasheet

Current PartRFQ

MC79L18ACPG

onsemiIn Stock: 1256MC79L18ACPG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the AN79L18 are identified based on the following critical parameters that must align for functional equivalence:

• Output Configuration: Negative
• Output Type: Fixed
• Fixed Output Voltage: -18V
• Current - Output: 100mA
• Voltage - Input (Max): -35V
• Operating Temperature Range: 0°C ~ 125°C
• Package / Case: TO-226-3 or TO-92-3 compatible
• Mounting Type: Through Hole

The MC79L18ACPG from onsemi meets all these criteria and is classified as an active product, making it a direct functional substitute for the obsolete AN79L18.

Parameter Comparison

Engineering Selection Recommendations

The MC79L18ACPG is the recommended substitute for the AN79L18 based on the following factors:

• Both devices share identical electrical specifications for output voltage (-18V), output current (100mA), and maximum input voltage (-35V).
• Both operate across the same temperature range (0°C ~ 125°C).
• Both utilize compatible through-hole packaging (TO-226-3/TO-92-3).
• The MC79L18ACPG is an active product with current manufacturing support and availability, whereas the AN79L18 is obsolete.
• The MC79L18ACPG carries RoHS3 compliance and REACH unaffected status, meeting modern regulatory requirements.
• Protection features are comparable, with the onsemi device offering short circuit protection in addition to over temperature protection.

Frequently Asked Questions (FAQ)

Q: Can the MC79L18ACPG be used as a direct replacement for the AN79L18?

A: Yes. Both devices provide identical fixed negative output voltage (-18V) at 100mA with the same maximum input voltage (-35V) and operating temperature range. The through-hole package compatibility and electrical specifications allow direct substitution in circuit designs.

Q: Are there any differences in protection features between these devices?

A: The AN79L18 includes over current and over temperature protection. The MC79L18ACPG provides over temperature and short circuit protection. Both offer thermal protection; the difference lies in the type of additional protection mechanism implemented by each manufacturer.

Q: What is the significance of the "Long Body" designation in the MC79L18ACPG package?

A: The TO-92-3 Long Body variant maintains the same electrical and functional characteristics as the standard TO-92-3 package. The physical length difference does not affect electrical performance and is typically accommodated in standard through-hole PCB layouts. Verify PCB footprint spacing if length is a constraint in your application.

Q: Why is the AN79L18 listed as obsolete?

A: Panasonic has discontinued the AN79L18 product line. The MC79L18ACPG from onsemi provides equivalent functionality and is actively manufactured, making it the appropriate choice for new designs and component replenishment.

Q: Are there regulatory compliance differences?

A: The MC79L18ACPG carries RoHS3 compliance and REACH unaffected status. The AN79L18 specifications do not include these modern regulatory certifications. For applications requiring RoHS3 compliance, the MC79L18ACPG is the appropriate selection.