LM317LCLPR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM317LCLPR is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This TO-92-3 packaged device delivers 100mA output current with adjustable voltage regulation from 1.2V to 32V. The part is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts ensures design continuity and supply chain resilience for applications currently utilizing this component.

Substiute Parts

LM317LCLPR

Texas InstrumentsIn Stock: 10948LM317LCLPR Datasheet

Current PartRFQ

LM317LCDR

Texas InstrumentsIn Stock: 2782LM317LCDR Datasheet

MFR RecommendedRFQ

LM317LCLPRE3

Texas InstrumentsIn Stock: 2830LM317LCLPRE3 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM317LCLPR is determined by strict equivalence across the following critical parameters:

• Output Configuration: Positive
• Output Type: Adjustable
• Number of Regulators: 1
• Voltage - Input (Max): 38V
• Voltage - Output (Min/Fixed): 1.2V
• Voltage - Output (Max): 32V
• Current - Output: 100mA
• Current - Quiescent (Iq): 2.5 mA
• PSRR: 80dB ~ 65dB (120Hz)
• Protection Features: Over Current, Over Temperature, Short Circuit
• Operating Temperature: 0°C ~ 125°C
• Base Product Number: LM317
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

Substitute parts are categorized as follows:

MFR Recommended Substitute: LM317LCDR differs in mounting type (Surface Mount vs. Through Hole) and package format (8-SOIC vs. TO-92-3), but maintains identical electrical specifications and regulatory compliance.

Parametric Equivalent: LM317LCLPRE3 maintains identical electrical specifications, package format (TO-92-3), and mounting type (Through Hole) as the main part, with equivalent product status classification.

Parameter Comparison

Engineering Selection Recommendations

For Through-Hole PCB Designs: The LM317LCLPRE3 provides direct substitution with identical package format (TO-92-3) and mounting type. Both the LM317LCLPR and LM317LCLPRE3 carry Last Time Buy status; long-term supply planning should prioritize the LM317LCDR for new designs.

For Surface-Mount PCB Designs: The LM317LCDR is the appropriate selection, offering Active product status and identical electrical performance in 8-SOIC packaging. This part ensures continued availability and supply chain stability.

Regulatory Compliance: All three parts maintain ROHS3 compliance and REACH Unaffected status, suitable for applications requiring environmental regulatory adherence.

Frequently Asked Questions (FAQ)

Q: Can LM317LCDR replace LM317LCLPR in existing through-hole designs?

A: Electrical substitution is valid; however, LM317LCDR uses 8-SOIC surface-mount packaging. PCB layout modification is required. For direct through-hole compatibility, use LM317LCLPRE3.

Q: What is the difference between LM317LCLPR and LM317LCLPRE3?

A: Both parts are electrically identical with matching TO-92-3 through-hole packaging. The primary distinction is product status designation. LM317LCLPRE3 is listed as an equivalent variant within the same product line.

Q: Why is LM317LCLPR classified as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued or will discontinue this specific part number variant. Existing inventory remains available, but future procurement should transition to active alternatives such as LM317LCDR.

Q: Are all three parts RoHS and REACH compliant?

A: Yes. LM317LCLPR, LM317LCDR, and LM317LCLPRE3 are all ROHS3 Compliant and REACH Unaffected.

Q: What are the key electrical parameters that must match for substitution?

A: Critical parameters include output configuration (Positive), output type (Adjustable), voltage range (1.2V to 32V), output current (100mA), quiescent current (2.5mA), and protection features (Over Current, Over Temperature, Short Circuit).

Q: Can I use LM317LCDR in a design originally specified for LM317LCLPR?

A: Electrical substitution is valid. Design changes are limited to PCB layout modifications to accommodate 8-SOIC surface-mount packaging instead of TO-92-3 through-hole format.