LM317BD2TG Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The LM317BD2TG is an active linear voltage regulator IC manufactured by onsemi, designed for positive adjustable output applications. This component delivers 1.5A output current in a surface-mount D2PAK-3 package and operates across an input voltage range up to 40V with adjustable output from 1.2V to 37V. The device is classified as Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical performance, package compatibility, and regulatory compliance can be maintained across different manufacturers or packaging configurations.

Substiute Parts

LM317BD2TG

onsemiIn Stock: 485272LM317BD2TG Datasheet

Current PartRFQ

LM317D2T-TR

STMicroelectronicsIn Stock: 669078LM317D2T-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM317BD2TG is determined by strict equivalence across the following critical parameters:

• Output configuration (Positive) and type (Adjustable)
• Electrical specifications: 1.5A output current, 40V maximum input voltage, 1.2V to 37V adjustable output range
• Quiescent current (10 mA) and PSRR performance (80dB ~ 65dB at 120Hz)
• Protection features: Over Current, Over Temperature, Short Circuit
• Package compatibility: D2PAK-3 / TO-263-3 surface-mount form factor
• Regulatory compliance: RoHS3 and REACH status
• Base product number: LM317

The LM317D2T-TR from STMicroelectronics meets all substitution criteria with identical electrical performance and package specifications. Packaging configuration differences (Tube versus Cut Tape & Digi-Reel) do not affect functional equivalence. Operating temperature range variation is noted but does not preclude substitution in applications within the overlapping temperature window (0°C ~ 125°C).

Parameter Comparison

Engineering Selection Recommendations

Both the LM317BD2TG and LM317D2T-TR are Active product status components with full RoHS3 compliance and REACH Unaffected designation, ensuring regulatory compliance for current and future applications. The electrical specifications are identical across all critical parameters including output current, voltage range, quiescent current, and protection features.

The primary distinction is the operating temperature range: the LM317BD2TG supports -40°C to 125°C, while the LM317D2T-TR operates from 0°C to 125°C. Selection between these parts should be based on application temperature requirements. For applications requiring extended low-temperature operation below 0°C, the LM317BD2TG is the appropriate choice. For applications within the 0°C to 125°C window, either part is functionally equivalent.

Packaging configuration (Tube for LM317BD2TG versus Cut Tape & Digi-Reel for LM317D2T-TR) reflects supply chain and procurement preferences and does not affect electrical performance or PCB integration.

Frequently Asked Questions (FAQ)

Q: Can LM317D2T-TR directly replace LM317BD2TG in existing designs?

A: Yes, for applications operating within the 0°C to 125°C temperature range. Both parts share identical electrical specifications, D2PAK-3 package compatibility, and regulatory compliance. Pin configuration and PCB footprint are equivalent.

Q: What is the impact of the operating temperature range difference?

A: The LM317BD2TG supports operation down to -40°C, while the LM317D2T-TR minimum is 0°C. If your application requires operation below 0°C, the LM317BD2TG must be used. For applications within 0°C to 125°C, both parts are interchangeable.

Q: Are the D2PAK and D2PAK-3 packages identical?

A: Both designations refer to the same TO-263-3 surface-mount package with 2 leads plus tab. The packages are mechanically and electrically compatible.

Q: Does packaging format (Tube vs. Cut Tape & Digi-Reel) affect component performance?

A: No. Packaging format is a supply chain and handling consideration only. Electrical performance and reliability are unaffected by packaging configuration.

Q: Are both parts suitable for new designs?

A: Yes. Both the LM317BD2TG and LM317D2T-TR carry Active product status, indicating full manufacturer support and availability for new designs.

Q: What protection features are included in both parts?

A: Both regulators include Over Current, Over Temperature, and Short Circuit protection, ensuring safe operation across specified electrical and thermal conditions.