NJM79M06FA Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The NJM79M06FA is a linear voltage regulator IC manufactured by Nisshinbo Micro Devices Inc., designed to provide a fixed negative output of -6V at 500mA in a TO-220-3 package. This device is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The NJM79M06FA serves applications requiring negative voltage regulation with thermal and short-circuit protection in through-hole mounting configurations.

Substiute Parts

NJM79M06FA

Nisshinbo Micro Devices Inc.In Stock: 2234NJM79M06FA Datasheet

Current PartRFQ

MC7906CT-BP

Micro Commercial CoIn Stock: 5266MC7906CT-BP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the NJM79M06FA is determined by the following critical parameters:

Output Voltage: Fixed -6V output is the primary functional requirement. Substitute parts must provide identical -6V negative output.

Input Voltage Range: Maximum input voltage of -35V establishes the input rating boundary. Substitute parts must support this specification.

Package Type: TO-220-3 through-hole mounting is mandatory for mechanical and thermal compatibility. Substitute parts must use identical or compatible TO-220 package variants.

Output Current Capability: The NJM79M06FA provides 500mA. Substitute parts with equal or greater current capacity (1A or higher) are acceptable for applications requiring the original 500mA specification.

Protection Features: Over-temperature and short-circuit protection are required functional characteristics. Substitute parts must include both protection mechanisms.

Negative Output Configuration: The negative voltage regulation topology is essential. Only negative-output regulators qualify as substitutes.

The MC7906CT-BP meets all substitution criteria through matching output voltage, input rating, package configuration, protection features, and negative output topology, while providing enhanced current capability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MC7906CT-BP

The MC7906CT-BP is the qualified substitute for the NJM79M06FA based on the following engineering criteria:

Functional Equivalence: Both devices provide -6V fixed negative output with identical input voltage rating (-35V maximum). The TO-220-3 package ensures mechanical and thermal compatibility without PCB redesign.

Enhanced Specifications: The MC7906CT-BP provides 1A output current, exceeding the original 500mA specification. This increased capacity provides design margin for applications operating at the original current level. Quiescent current is reduced to 2mA, improving power efficiency. PSRR performance is enhanced to 60dB.

Product Status and Compliance: The MC7906CT-BP is active production status, ensuring long-term availability and supply chain continuity. Both devices maintain RoHS compliance (RoHS3 for MC7906CT-BP), and both are REACH Unaffected with identical ECCN and HTSUS classifications.

Operating Temperature Consideration: The MC7906CT-BP operates across 0°C to 125°C, compared to the NJM79M06FA range of -40°C to 85°C. Applications requiring operation below 0°C must retain the original part or identify alternative solutions.

Moisture Sensitivity: The MC7906CT-BP carries MSL 1 (Unlimited), providing superior moisture handling compared to the NJM79M06FA MSL 2 (1 Year).

Frequently Asked Questions (FAQ)

Q: Can the MC7906CT-BP directly replace the NJM79M06FA without PCB modifications?

A: Yes. Both devices use the TO-220-3 package with identical pin configuration and through-hole mounting. No PCB layout changes are required for mechanical substitution.

Q: What is the significance of the increased 1A current rating on the MC7906CT-BP?

A: The MC7906CT-BP provides 1A output current versus the NJM79M06FA 500mA rating. Applications drawing 500mA or less operate within the MC7906CT-BP specification with additional current margin. Applications requiring exactly 500mA benefit from improved thermal performance and reduced voltage dropout.

Q: Are there thermal management differences between these devices?

A: Both devices are housed in TO-220-3 packages with identical thermal characteristics. The MC7906CT-BP lower quiescent current (2mA vs 5mA) reduces standby power dissipation. Thermal performance depends on PCB layout, heatsinking, and ambient conditions rather than package differences.

Q: What is the impact of the different operating temperature ranges?

A: The NJM79M06FA operates from -40°C to 85°C, while the MC7906CT-BP operates from 0°C to 125°C. Applications requiring operation below 0°C cannot use the MC7906CT-BP. Applications within 0°C to 85°C can use either device. Applications requiring operation above 85°C require the MC7906CT-BP.

Q: How do the PSRR specifications compare?

A: The MC7906CT-BP provides 60dB PSRR at 120Hz compared to 57dB for the NJM79M06FA. This 3dB improvement indicates better power supply rejection and reduced output noise ripple in the MC7906CT-BP.

Q: Is the MC7906CT-BP suitable for new designs?

A: Yes. The MC7906CT-BP is active production status with ROHS3 compliance, making it appropriate for new product development. The NJM79M06FA obsolete status makes the MC7906CT-BP the recommended choice for new designs requiring -6V negative regulation.

Q: What is the difference between TO-220F and TO-220AB package designations?

A: Both designations refer to TO-220-3 package variants. TO-220F and TO-220AB are supplier-specific package codes for the same three-pin TO-220 configuration. Mechanical and electrical compatibility is maintained.

Q: Are there any compliance or certification differences?

A: Both devices are RoHS compliant, REACH Unaffected, and carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications. The MC7906CT-BP carries ROHS3 certification, representing current RoHS standard compliance.