LM317LCDRG4 Equivalent & Substitute Parts

Part Overview

The LM317LCDRG4 is a linear voltage regulator IC from Texas Instruments designed for positive adjustable output applications. It delivers 100mA output current with an adjustable voltage range from 1.2V to 32V, making it suitable for general-purpose power management circuits requiring regulated DC supply. The device is currently in Last Time Buy status, indicating discontinued production. Identifying equivalent substitute parts ensures design continuity and supply chain reliability for existing applications and new designs requiring compatible functionality.

Substiute Parts

LM317LCDRG4

Texas InstrumentsIn Stock: 29896LM317LCDRG4 Datasheet

Current PartRFQ

LM317LCDR

Texas InstrumentsIn Stock: 2782LM317LCDR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The LM317LCDRG4 can be substituted with the LM317LCDR based on strict parametric equivalence. Both parts share identical electrical specifications across all critical performance parameters: positive adjustable output configuration, 100mA output current capability, 1.2V to 32V output voltage range, 38V maximum input voltage, 2.5mA quiescent current, and identical protection features (Over Current, Over Temperature, Short Circuit). Both devices are housed in the 8-SOIC package with matching physical dimensions and are manufactured by Texas Instruments from the same LM317 base product family.

The primary distinction between these parts is packaging format: the LM317LCDRG4 is supplied in Tape & Reel (TR) format, while the LM317LCDR is available in Cut Tape (CT) & Digi-Reel® format. This difference affects procurement and handling but does not impact electrical performance or functional compatibility. Both parts maintain ROHS3 compliance, MSL Level 1 rating, and identical operating temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

The LM317LCDR is a direct parametric equivalent to the LM317LCDRG4 and is suitable for substitution in all applications where the LM317LCDRG4 was originally specified. The LM317LCDR maintains Active product status, ensuring ongoing availability and supply chain stability compared to the Last Time Buy status of the LM317LCDRG4. Both parts carry identical ROHS3 compliance and REACH Unaffected certifications, meeting regulatory requirements for equivalent applications.

Selection between these parts should be based on procurement requirements and packaging format compatibility. The LM317LCDR in Cut Tape & Digi-Reel® format is appropriate for lower-volume applications and manual assembly processes, while the LM317LCDRG4 in Tape & Reel format is optimized for high-volume automated assembly. No electrical performance differences exist between the two variants.

Frequently Asked Questions (FAQ)

Q: Can the LM317LCDR replace the LM317LCDRG4 in existing designs?

A: Yes. The LM317LCDR is a parametric equivalent with identical electrical specifications, output voltage range (1.2V to 32V), output current (100mA), input voltage rating (38V maximum), and protection features. Pin configuration and package dimensions are identical in the 8-SOIC form factor.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel packaging is used for high-volume automated assembly lines, while Cut Tape & Digi-Reel® packaging is suitable for lower-volume production and manual assembly. The electrical performance and physical dimensions of the components are identical; only the delivery format differs.

Q: Are there compliance differences between LM317LCDRG4 and LM317LCDR?

A: No. Both parts are ROHS3 compliant, REACH Unaffected, and carry MSL Level 1 (Unlimited) moisture sensitivity ratings. Regulatory and environmental compliance is equivalent.

Q: Why is the LM317LCDRG4 in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer has discontinued production of this specific packaging variant. The LM317LCDR in alternative packaging remains in Active status, providing a path for continued supply of the LM317 linear regulator family.

Q: Are the quiescent current and PSRR specifications identical?

A: Yes. Both parts specify 2.5mA quiescent current and 80dB ~ 65dB PSRR at 120Hz, ensuring equivalent performance in low-noise and low-power applications.