LM317LIPWR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM317LIPWR is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. It delivers 100mA output current with adjustable voltage ranging from 1.2V to 32V, making it suitable for general-purpose power management circuits requiring regulated DC supply. The device is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs or component replenishment.

Substiute Parts

LM317LIPWR

Texas InstrumentsIn Stock: 52204LM317LIPWR Datasheet

Current PartRFQ

LM317LIDR

Texas InstrumentsIn Stock: 10194LM317LIDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM317LIPWR 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: -40°C ~ 125°C
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

The LM317LIDR qualifies as a direct substitute based on identical electrical performance specifications and regulatory compliance. The primary difference is packaging format: LM317LIPWR uses 8-TSSOP while LM317LIDR uses 8-SOIC. Both packages are surface-mount configurations with compatible pin counts and functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The LM317LIDR is the manufacturer-recommended substitute for the LM317LIPWR. Both devices share identical electrical specifications, regulatory compliance certifications (ROHS3, REACH Unaffected), and functional performance characteristics. The LM317LIDR maintains Active product status, ensuring long-term availability and supply chain stability compared to the Last Time Buy status of the LM317LIPWR.

The primary design consideration is package format compatibility. The LM317LIPWR uses 8-TSSOP packaging while the LM317LIDR uses 8-SOIC packaging. PCB layout modifications are required to accommodate the different package footprints. Both packages are industry-standard surface-mount formats with equivalent pin functionality and electrical performance.

Frequently Asked Questions (FAQ)

Q: Can LM317LIDR directly replace LM317LIPWR without circuit modifications?

A: Electrical functionality is identical. PCB layout must be modified to accommodate the different package footprint (8-TSSOP versus 8-SOIC). Pin assignments and electrical connections remain functionally equivalent.

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

A: Both are 8-pin surface-mount packages. 8-TSSOP has a body width of 4.40mm (0.173"), while 8-SOIC has a body width of 3.90mm (0.154"). The 8-SOIC package is slightly narrower. Pin pitch and electrical characteristics are compatible.

Q: Why is LM317LIPWR marked as Last Time Buy?

A: Last Time Buy status indicates the manufacturer has discontinued production. The LM317LIDR, with Active status, is the recommended alternative for new designs and ongoing production requirements.

Q: Are the electrical performance specifications identical between these parts?

A: Yes. Both devices deliver 100mA output current, support adjustable voltage output from 1.2V to 32V, accept input voltage up to 38V, and include identical protection features (Over Current, Over Temperature, Short Circuit). Quiescent current and PSRR specifications are identical.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both LM317LIPWR and LM317LIDR are ROHS3 Compliant and REACH Unaffected, with identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited).

Q: What inventory considerations apply to these parts?

A: LM317LIPWR has 52,100 pieces in stock but is Last Time Buy. LM317LIDR has 10,099 pieces in stock and maintains Active product status, providing better long-term availability assurance.