LM317LBDG Linear Voltage Regulator IC Equivalent & Substitute Parts

Part Overview

The LM317LBDG is a linear voltage regulator IC manufactured by onsemi, designed for positive adjustable output applications with 100mA current capability in an 8-SOIC surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The LM317LBDG provides adjustable output voltage regulation from 1.2V to 37V with integrated protection features including over-current, over-temperature, and short-circuit protection.

Substiute Parts

LM317LBDG

onsemiIn Stock: 8331LM317LBDG Datasheet

Current PartRFQ

LM317LD13TR

STMicroelectronicsIn Stock: 886604LM317LD13TR Datasheet

DirectRFQ

LM217LD13TR

STMicroelectronicsIn Stock: 40567LM217LD13TR Datasheet

SimilarRFQ

LM317LID

Texas InstrumentsIn Stock: 2081LM317LID Datasheet

SimilarRFQ

LM317LM/NOPB

Texas InstrumentsIn Stock: 35198LM317LM/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LM317LBDG are classified based on electrical and mechanical compatibility within the following criteria:

Direct Manufacturer Substitutes maintain identical electrical specifications across all critical parameters: 40V maximum input voltage, 1.2V to 37V adjustable output range, 100mA output current, 8-SOIC package, positive adjustable output configuration, and equivalent protection features. These parts are pin-compatible and functionally interchangeable.

Similar Manufacturer Substitutes share the same base product family (LM217/LM317 series) and core electrical characteristics but may have minor variations in quiescent current, PSRR performance, or specific protection feature sets. These parts require verification of application-specific requirements before substitution.

Parametric Equivalent Substitutes match the primary electrical performance parameters and package specification but originate from different manufacturers. These parts are suitable for applications where the specific electrical characteristics are the primary selection criteria.

The key parameters determining substitution eligibility are: package type (8-SOIC), output voltage range (1.2V to 37V minimum), output current (100mA), input voltage rating (40V or higher), and protection feature set.

Parameter Comparison

Engineering Selection Recommendations

LM317LD13TR (STMicroelectronics) is the primary direct substitute for the LM317LBDG. This part maintains full electrical compatibility with identical input/output voltage specifications and 100mA output current. The part is currently in active production status with substantial inventory availability. The lower quiescent current (5mA versus 10mA) provides improved efficiency in battery-powered applications. This part is ROHS3 compliant and available in Cut Tape and Digi-Reel packaging formats.

LM317LM/NOPB (Texas Instruments) serves as a parametric equivalent with identical electrical specifications and active product status. This part matches the full voltage range (40V input, 1.2V to 37V output) and includes all protection features. ROHS3 compliance and tube packaging are provided. This option is suitable for applications requiring Texas Instruments sourcing or qualification.

LM217LD13TR (STMicroelectronics) is a similar substitute within the LM217/LM317 product family. This part shares the same package, voltage ratings, and output current specifications. The operating temperature range matches the original part (-40°C to 125°C). Note that over-current protection is not specified for this variant; applications requiring this protection feature should select LM317LD13TR or LM317LM/NOPB instead.

LM317LID (Texas Instruments) is classified as Last Time Buy status. While this part provides full protection features and operates across the required temperature range, the maximum output voltage is limited to 32V compared to the 37V specification of the original part. This limitation restricts its use to applications with output voltage requirements not exceeding 32V. The exceptionally low quiescent current (2.5mA) may benefit low-power applications within this voltage constraint.

Frequently Asked Questions (FAQ)

Q: Can LM317LD13TR directly replace LM317LBDG without circuit modifications?

A: Yes. LM317LD13TR is a direct electrical and mechanical substitute. Both parts share identical pin configuration, package dimensions (8-SOIC), voltage specifications (40V input, 1.2V to 37V output), and 100mA output current rating. No circuit modifications are required.

Q: What is the difference between LM317LD13TR and LM217LD13TR?

A: Both parts are functionally equivalent for most applications. The primary difference is that LM217LD13TR does not specify over-current protection, while LM317LD13TR includes this feature. For applications requiring comprehensive protection, LM317LD13TR is the preferred selection.

Q: Why is the LM317LID output voltage limited to 32V?

A: The LM317LID is specified with a maximum output voltage of 32V, compared to 37V for other variants. This is a manufacturer specification difference. Applications requiring output voltages between 32V and 37V must use LM317LD13TR or LM317LM/NOPB.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range should be verified against application requirements. LM317LD13TR operates from 0°C to 125°C, while LM317LBDG, LM217LD13TR, LM317LID, and LM317LM/NOPB all operate from -40°C to 125°C. For applications requiring operation below 0°C, LM317LD13TR is not suitable.

Q: Are all substitute parts ROHS3 compliant?

A: LM317LD13TR, LM217LD13TR, LM317LID, and LM317LM/NOPB are all ROHS3 compliant. The original LM317LBDG does not specify RoHS status.

Q: What packaging options are available for these substitutes?

A: LM317LD13TR and LM217LD13TR are available in Cut Tape (CT) and Digi-Reel packaging. LM317LID and LM317LM/NOPB are supplied in tube packaging. Select based on your procurement and assembly process requirements.

Q: How does quiescent current differ among these parts?

A: Quiescent current varies: LM317LBDG (10mA), LM317LD13TR (5mA), LM317LID (2.5mA), and LM317LM/NOPB (5mA). Lower quiescent current reduces standby power consumption. For battery-powered or low-power applications, LM317LID offers the lowest quiescent current specification.