LM317AHVT Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM317AHVT is a linear voltage regulator IC manufactured by onsemi, designed for positive adjustable output applications with 1.5A current capability in a TO-220-3 package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The LM317 series represents a widely adopted standard for adjustable linear regulation across multiple manufacturers, enabling direct functional substitution where electrical and mechanical parameters align.

Substiute Parts

LM317AHVT

onsemiIn Stock: 3014LM317AHVT Datasheet

Current PartRFQ

LM317TG

onsemiIn Stock: 2439LM317TG Datasheet

SimilarRFQ

LM317BT

STMicroelectronicsIn Stock: 3203LM317BT Datasheet

SimilarRFQ

LM317HVT/NOPB

Texas InstrumentsIn Stock: 3367LM317HVT/NOPB Datasheet

SimilarRFQ

LT317AT#PBF

Analog Devices Inc.In Stock: 2043LT317AT#PBF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM317AHVT is determined by the following critical parameters:

Primary Compatibility Criteria:

• Output configuration (Positive Adjustable)
• Package type (TO-220-3)
• Output current rating (1.5A minimum)
• Input voltage rating (minimum 60V for full compatibility)
• Operating temperature range (must support -40°C minimum for extended industrial applications)
• Protection features (Over Current, Over Temperature, Short Circuit)

Substitution Logic: Parts are grouped into two categories based on input voltage specification. Full substitutes maintain the 60V input maximum rating, ensuring compatibility in high-voltage applications. Partial substitutes with 40V input maximum are suitable for applications where input voltage does not exceed 40V. All substitute parts maintain identical output current (1.5A), adjustable output configuration, and TO-220-3 packaging.

Parameter Comparison

Engineering Selection Recommendations

Full Substitutes (60V Input Rating): LM317HVT/NOPB (Texas Instruments) and LM317AHVT (onsemi) are direct equivalents for applications requiring 60V input maximum specification. LM317HVT/NOPB is the preferred active substitute, offering identical electrical performance with active product status and full temperature range support (-40°C to 125°C is not specified; actual range is 0°C ~ 125°C per datasheet). Both parts maintain 1.5A output current and complete protection feature sets.

Partial Substitutes (40V Input Rating): LM317TG (onsemi), LM317BT (STMicroelectronics), and LT317AT#PBF (Analog Devices) are suitable substitutes for applications where input voltage does not exceed 40V. LM317BT offers the widest operating temperature range (-40°C ~ 125°C) among 40V-rated options. LM317TG provides onsemi continuity with active status. LT317AT#PBF from Analog Devices includes only Over Temperature protection, lacking Over Current and Short Circuit protection features present in the original part.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity. Inventory availability ranges from 2014 to 3350 pieces across active substitutes, supporting production requirements.

Frequently Asked Questions (FAQ)

Q: Can LM317TG replace LM317AHVT in all applications? A: LM317TG is suitable only for applications where input voltage remains below 40V. The original LM317AHVT supports 60V input maximum. If your circuit requires 40V to 60V input operation, use LM317HVT/NOPB or verify that your design operates within the 40V limit.

Q: What is the difference between LM317HVT/NOPB and LM317AHVT? A: Both parts support 60V input maximum and 1.5A output current in TO-220-3 packaging. LM317HVT/NOPB is manufactured by Texas Instruments with active product status, while LM317AHVT (onsemi) is obsolete. Electrical performance is equivalent for applications within the specified operating ranges.

Q: Why does LT317AT#PBF have fewer protection features? A: LT317AT#PBF includes only Over Temperature protection, whereas LM317AHVT includes Over Current, Over Temperature, and Short Circuit protection. Applications requiring short circuit protection should not use LT317AT#PBF as a substitute.

Q: Are all substitute parts available in the same packaging? A: All substitute parts use TO-220-3 package with Through Hole mounting type, ensuring mechanical compatibility. Supplier device packaging may vary (Tube, Bulk, or TO-220), but the component package remains identical.

Q: Which substitute offers the best temperature range coverage? A: LM317AHVT and LM317BT both support -40°C ~ 125°C operating temperature. LM317TG, LM317HVT/NOPB, and LT317AT#PBF support 0°C ~ 125°C. For extended low-temperature applications below 0°C, use LM317BT or verify the original LM317AHVT availability.

Q: Can I use these substitutes interchangeably on the same PCB? A: Yes, all substitute parts use identical TO-220-3 pinout and footprint. However, verify that your circuit design accommodates the input voltage and protection feature differences noted in the parameter comparison table before substitution.