LM317MABDTG Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM317MABDTG is an active linear voltage regulator IC manufactured by onsemi, designed for positive adjustable output applications. This Surface Mount device delivers 500mA output current in a DPAK (TO-252-3) package and operates across an input voltage range of up to 40V with adjustable output from 1.2V to 37V. The part is currently in active production status with 2502 units in stock inventory. Equivalent and substitute parts are identified to support procurement flexibility, supply chain continuity, and design alternatives while maintaining electrical and mechanical compatibility.

Substiute Parts

LM317MABDTG

onsemiIn Stock: 2549LM317MABDTG Datasheet

Current PartRFQ

LM217MDT-TR

STMicroelectronicsIn Stock: 146999LM217MDT-TR Datasheet

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LM317MDT-TR

STMicroelectronicsIn Stock: 150266LM317MDT-TR Datasheet

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LM317MDT/NOPB

Texas InstrumentsIn Stock: 2919LM317MDT/NOPB Datasheet

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LM317MDTX/NOPB

Texas InstrumentsIn Stock: 2256LM317MDTX/NOPB Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM317MABDTG are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Compatibility Criteria:

• Output Configuration: Positive
• Output Type: Adjustable
• Current - Output: 500mA
• PSRR: 80dB ~ 65dB (120Hz)
• Protection Features: Over Current, Over Temperature, Short Circuit
• Voltage - Input (Max): 40V or higher
• Voltage - Output Range: 1.2V to 37V minimum
• Current - Quiescent (Iq): 10 mA

Mechanical Compatibility Criteria:

• Package / Case: TO-252-3, DPAK (2 Leads + Tab), SC-63
• Mounting Type: Surface Mount

Compliance Criteria:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

All identified substitute parts meet these core parameters and are therefore electrically and mechanically interchangeable with the LM317MABDTG in applications requiring positive adjustable linear voltage regulation at 500mA output.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status and ROHS3 compliance, supporting long-term design viability and regulatory adherence.

LM217MDT-TR (STMicroelectronics): Fully compatible with LM317MABDTG across all critical electrical parameters. Identical input voltage maximum (40V), output voltage range (1.2V to 37V), and output current (500mA). MSL rating of 1 matches the main part. Note: Over Current protection is not specified for this variant.

LM317MDT-TR (STMicroelectronics): Direct functional equivalent with matching electrical specifications including 40V maximum input, 1.2V to 37V output range, and complete protection feature set. Operating temperature range begins at 0°C versus -40°C for the main part. MSL rating of 1 provides equivalent moisture handling.

LM317MDT/NOPB (Texas Instruments): Electrically compatible with maximum input voltage of 37V (1V lower than main part) and minimum output voltage of 1.25V (0.05V higher than main part). All other electrical parameters align. MSL rating of 2 indicates 1-year moisture sensitivity versus unlimited for the main part.

LM317MDTX/NOPB (Texas Instruments): Functionally equivalent to LM317MDT/NOPB with identical electrical specifications and Tape & Reel packaging option. MSL rating of 2 applies.

Frequently Asked Questions (FAQ)

Q: Can LM217MDT-TR be used as a direct replacement for LM317MABDTG?

A: LM217MDT-TR is electrically compatible across all critical parameters including 40V maximum input, 1.2V to 37V adjustable output, 500mA output current, and identical DPAK package. However, Over Current protection is not specified for LM217MDT-TR, whereas the main part includes this feature. Verify application requirements for Over Current protection before substitution.

Q: What is the difference between the STMicroelectronics and Texas Instruments substitute options?

A: STMicroelectronics variants (LM217MDT-TR and LM317MDT-TR) support 40V maximum input voltage, while Texas Instruments variants (LM317MDT/NOPB and LM317MDTX/NOPB) are rated to 37V maximum input. STMicroelectronics parts have MSL rating of 1 (unlimited moisture sensitivity), while Texas Instruments parts have MSL rating of 2 (1-year moisture sensitivity). All parts share identical 500mA output current, DPAK package, and ROHS3 compliance.

Q: Are the operating temperature ranges interchangeable?

A: The main part LM317MABDTG operates from -40°C to 125°C. LM217MDT-TR matches this range. LM317MDT-TR, LM317MDT/NOPB, and LM317MDTX/NOPB operate from 0°C to 125°C, with a -40°C to 0°C gap at the lower end. Select based on application minimum operating temperature requirements.

Q: Do all substitute parts use the same DPAK package?

A: All substitute parts use the TO-252-3 DPAK (2 Leads + Tab) package, SC-63 designation. They are mechanically interchangeable in PCB layouts designed for the LM317MABDTG.

Q: What packaging options are available for these parts?

A: LM317MABDTG is supplied in Tube packaging. LM217MDT-TR and LM317MDT-TR are available in Cut Tape (CT) & Digi-Reel® packaging. LM317MDT/NOPB is supplied in Tube packaging. LM317MDTX/NOPB is supplied in Tape & Reel (TR) packaging. Verify packaging compatibility with procurement and assembly processes.

Q: Are all parts ROHS3 compliant?

A: All listed parts, including the main part and all substitutes, are ROHS3 compliant and REACH unaffected, supporting regulatory requirements for electronics manufacturing and distribution.