LM320T-5.0 Equivalent & Substitute Parts

Part Overview

The LM320T-5.0 is a linear voltage regulator IC from Texas Instruments designed to provide a fixed negative output of -5V at 1.5A in a TO-220-3 package. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The LM320T-5.0 serves applications requiring negative voltage regulation with thermal and overcurrent protection in through-hole mounting configurations.

Substiute Parts

LM320T-5.0

Texas InstrumentsIn Stock: 6024LM320T-5.0 Datasheet

Current PartRFQ

L7905ACV

STMicroelectronicsIn Stock: 11263L7905ACV Datasheet

MFR RecommendedRFQ

MC7905BTG

onsemiIn Stock: 2072MC7905BTG Datasheet

MFR RecommendedRFQ

UA7905CKCS

Texas InstrumentsIn Stock: 3018UA7905CKCS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM320T-5.0 are qualified based on the following critical parameters:

• Output voltage: -5V fixed (all substitutes match)
• Output current capability: minimum 1.5A (primary requirement)
• Package type: TO-220-3 through-hole mounting
• Negative output configuration
• Operating temperature range compatibility
• Protection features: Over temperature and overcurrent protection

The three qualified substitutes (L7905ACV, MC7905BTG, and UA7905CKCS) meet these core electrical and mechanical requirements. Variations in maximum input voltage, dropout voltage, quiescent current, and PSRR do not prevent substitution when the application requirements fall within the specified ranges of the substitute part.

Parameter Comparison

Engineering Selection Recommendations

L7905ACV (STMicroelectronics) is the primary recommended substitute. It maintains full electrical compatibility with 1.5A output current capability, matches the TO-220-3 package, and is currently in active production status. This part offers improved maximum input voltage rating (-35V vs -25V) and is ROHS3 compliant, making it suitable for new designs and long-term availability.

UA7905CKCS (Texas Instruments) provides an alternative from the original manufacturer. It maintains identical output current (1.5A) and package specifications. However, this part carries a Last Time Buy status, indicating limited future availability. It includes enhanced short circuit protection compared to the original LM320T-5.0.

MC7905BTG (onsemi) is a qualified substitute with active production status and ROHS3 compliance. The primary limitation is reduced output current capability (1A vs 1.5A). This part is suitable only for applications requiring maximum output current of 1A or less. It offers the widest operating temperature range (-40°C ~ 125°C) and superior PSRR performance (70dB).

For new designs requiring full 1.5A capability, L7905ACV is the preferred choice due to active status and long-term availability. For applications limited to 1A output, MC7905BTG provides an alternative with enhanced performance characteristics.

Frequently Asked Questions (FAQ)

Q: Can MC7905BTG replace LM320T-5.0 in all applications?

A: MC7905BTG is a qualified substitute only for applications requiring maximum output current of 1A or less. The LM320T-5.0 and its primary substitutes (L7905ACV and UA7905CKCS) are rated for 1.5A output. If your application requires the full 1.5A capability, MC7905BTG is not suitable.

Q: What is the difference between the TO-220-3 package variants listed?

A: All three substitute parts use the TO-220-3 through-hole package with identical pin configuration and mechanical dimensions. The package designation variations (TO-220AB vs TO-220-3) refer to supplier packaging formats but do not affect electrical or mechanical compatibility.

Q: Are all substitute parts RoHS compliant?

A: L7905ACV, MC7905BTG, and UA7905CKCS are all ROHS3 compliant. The original LM320T-5.0 is RoHS non-compliant. If RoHS compliance is required for your application, any of the three substitutes meet this requirement.

Q: What is the significance of the product status differences?

A: L7905ACV carries Active status, indicating ongoing production and long-term availability. MC7905BTG is also Active. UA7905CKCS is Last Time Buy, meaning production will cease and future availability is limited. For new designs, L7905ACV is the recommended choice for supply chain continuity.

Q: Can I use these substitutes interchangeably on existing PCBs designed for LM320T-5.0?

A: Yes. All three substitute parts use identical TO-220-3 through-hole package dimensions and pin configurations. Direct mechanical and electrical substitution is possible without PCB modifications.

Q: How do the protection features differ between substitutes?

A: LM320T-5.0 includes over current and over temperature protection. L7905ACV adds short circuit protection but removes over current protection. MC7905BTG maintains both over current and over temperature protection. UA7905CKCS provides all three protection features (over current, over temperature, and short circuit).