LM317LCPWRG4 Equivalent & Substitute Parts

Part Overview

The LM317LCPWRG4 is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. This device delivers 100mA output current with adjustable voltage regulation from 1.2V to 32V, making it suitable for power management circuits requiring flexible voltage levels. The part is classified as Last Time Buy, indicating limited future availability. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for applications currently using this component.

Substiute Parts

LM317LCPWRG4

Texas InstrumentsIn Stock: 896LM317LCPWRG4 Datasheet

Current PartRFQ

LM317LCDR

Texas InstrumentsIn Stock: 2782LM317LCDR Datasheet

MFR RecommendedRFQ

LM317LCPWR

Texas InstrumentsIn Stock: 4464LM317LCPWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM317LCPWRG4 is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Output configuration (Positive)
• Output type (Adjustable)
• Number of regulators (1)
• Voltage input maximum (38V)
• Voltage output range (1.2V to 32V)
• Output current (100mA)
• Quiescent current (2.5 mA)
• PSRR specification (80dB ~ 65dB at 120Hz)
• Protection features (Over Current, Over Temperature, Short Circuit)
• Operating temperature range (0°C ~ 125°C)

Mechanical Compatibility Criteria:

• Mounting type (Surface Mount)
• Base product number (LM317)
• RoHS and REACH compliance status

Substitute parts must match all electrical parameters and maintain compliance certifications. Package variations are acceptable when pin configuration and electrical characteristics remain identical.

Parameter Comparison

Engineering Selection Recommendations

LM317LCDR: This substitute offers identical electrical specifications and full compliance alignment with the LM317LCPWRG4. The primary distinction is the package format: 8-SOIC (0.154", 3.90mm Width) versus 8-TSSOP. Both packages are surface-mount compatible with equivalent pin configurations. The LM317LCDR carries Active product status, ensuring continued availability and supply chain stability. This part is recommended for applications where PCB layout accommodates the 8-SOIC package footprint.

LM317LCPWR: This substitute maintains identical electrical specifications and compliance certifications as the LM317LCPWRG4. Both parts use the same 8-TSSOP package format, eliminating PCB redesign requirements. The LM317LCPWR carries Last Time Buy status, similar to the main part, indicating limited future availability. This part is suitable for direct replacement in existing designs without package-related modifications.

Frequently Asked Questions (FAQ)

Q: Can LM317LCDR be used as a direct replacement for LM317LCPWRG4?

A: LM317LCDR is electrically equivalent and functionally interchangeable. The difference is package format: LM317LCDR uses 8-SOIC while LM317LCPWRG4 uses 8-TSSOP. PCB layout modifications are required to accommodate the different package footprint. Pin configuration and electrical performance are identical.

Q: What is the difference between 8-TSSOP and 8-SOIC packages?

A: Both are surface-mount packages with 8 pins. 8-TSSOP measures 0.173" (4.40mm) in width, while 8-SOIC measures 0.154" (3.90mm) in width. The packages have different footprint geometries and require distinct PCB land patterns. Electrical functionality is identical.

Q: Is LM317LCPWR a suitable substitute?

A: Yes. LM317LCPWR is electrically and mechanically identical to LM317LCPWRG4, using the same 8-TSSOP package. No PCB modifications are necessary. Both parts carry Last Time Buy status.

Q: Are all three parts RoHS and REACH compliant?

A: Yes. LM317LCPWRG4, LM317LCDR, and LM317LCPWR are all ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: Which substitute offers the best long-term availability?

A: LM317LCDR carries Active product status, indicating ongoing manufacturing and supply availability. LM317LCPWRG4 and LM317LCPWR both carry Last Time Buy status, signaling limited future production.