LM317LBZRA Equivalent & Substitute Parts

Part Overview

The LM317LBZRA is a linear voltage regulator IC with positive adjustable output, rated for 100mA maximum output current in a TO-92 (TO-226) through-hole package. Manufactured by onsemi, this component is classified as obsolete, which necessitates identification of equivalent and substitute parts for ongoing design support and procurement.

The LM317LBZRA provides adjustable output voltage regulation from 1.2V to 37V with integrated protection features including over-current, over-temperature, and short-circuit protection. Its 80dB PSRR at 120Hz and 10mA quiescent current make it suitable for low-power adjustable supply applications.

Substiute Parts

LM317LBZRA

onsemiIn Stock: 746LM317LBZRA Datasheet

Current PartRFQ

LM317LBZRAG

onsemiIn Stock: 4850LM317LBZRAG Datasheet

DirectRFQ

LM317LBZRPG

onsemiIn Stock: 3287LM317LBZRPG Datasheet

Parametric EquivalentRFQ

NCV317LBZRAG

onsemiIn Stock: 788NCV317LBZRAG Datasheet

Parametric EquivalentRFQ

LM317LILPR

Texas InstrumentsIn Stock: 3485LM317LILPR Datasheet

DirectRFQ

LM217LZ-TR

STMicroelectronicsIn Stock: 5201LM217LZ-TR Datasheet

SimilarRFQ

LM317LZ-AP

STMicroelectronicsIn Stock: 17987LM317LZ-AP Datasheet

SimilarRFQ

LM317LZ-TR

STMicroelectronicsIn Stock: 1994LM317LZ-TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LM317LBZRA is determined by strict equivalence across the following critical parameters:

• Output configuration (Positive)
• Output type (Adjustable)
• Voltage input maximum (40V)
• Voltage output range (1.2V to 37V minimum)
• Output current rating (100mA)
• Protection features (Over Current, Over Temperature, Short Circuit)
• Package type (TO-92-3 / TO-226-3)
• Mounting type (Through Hole)

Substitute parts are grouped into three categories:

Direct Manufacturer Equivalents – Parts from onsemi with identical electrical specifications and packaging, differing only in product status or packaging format (tape vs. reel).

Parametric Equivalents – Parts meeting all critical electrical parameters with identical or superior performance characteristics, including automotive-grade variants.

Similar Cross-Manufacturer Parts – Parts from alternative manufacturers (Texas Instruments, STMicroelectronics) with equivalent or superior electrical specifications and compatible packaging.

Parameter Comparison

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: LM317LBZRAG and LM317LBZRPG are direct onsemi replacements with identical electrical specifications and ROHS3 compliance. Both are in active production status with adequate inventory availability.

For Automotive Applications: NCV317LBZRAG is the automotive-grade equivalent, qualified to AEC-Q100 standard. This part maintains identical electrical specifications while meeting automotive qualification requirements.

For Cross-Manufacturer Alternatives: STMicroelectronics LM317LZ-AP and LM317LZ-TR provide equivalent performance with active product status. Both support the full -40°C to 125°C operating range and meet ROHS3 compliance. The LM317LZ-AP variant has a reduced operating temperature floor of 0°C.

For Legacy System Continuity: Texas Instruments LM317LILPR maintains functional compatibility with slightly reduced maximum input voltage (38V vs. 40V) and output voltage ceiling (32V vs. 37V). This part is in Last Time Buy status and should be evaluated for long-term availability.

Frequently Asked Questions (FAQ)

Q: Can LM317LBZRAG directly replace LM317LBZRA in existing designs? A: Yes. LM317LBZRAG is electrically identical to LM317LBZRA with matching voltage ratings, current output, and protection features. The primary difference is product status (Active vs. Obsolete) and RoHS compliance. Pin configuration and package dimensions are identical.

Q: What is the difference between LM317LBZRAG and LM317LBZRPG? A: Both parts are electrically identical onsemi LM317 variants with identical specifications. The difference lies in packaging format: LBZRAG is supplied in Cut Tape (CT), while LBZRPG is also in Cut Tape format. Both are ROHS3 compliant and in active production.

Q: Is NCV317LBZRAG suitable for non-automotive applications? A: Yes. NCV317LBZRAG meets all electrical specifications of the LM317LBZRA and exceeds automotive qualification requirements. It can be used in any application requiring the LM317 electrical characteristics. Automotive qualification does not restrict use in general-purpose applications.

Q: How does the Texas Instruments LM317LILPR differ from onsemi equivalents? A: LM317LILPR has slightly reduced maximum input voltage (38V vs. 40V) and output voltage ceiling (32V vs. 37V). It features lower quiescent current (2.5mA vs. 10mA), which may be advantageous in low-power applications. This part is in Last Time Buy status and should be evaluated for long-term procurement viability.

Q: Are STMicroelectronics LM317LZ-AP and LM317LZ-TR interchangeable? A: Both parts are electrically equivalent with identical voltage ratings and current output. The primary difference is operating temperature range: LM317LZ-AP operates from 0°C to 125°C, while LM317LZ-TR operates from -40°C to 125°C. Selection depends on application temperature requirements.

Q: What are the key parameters that determine substitutability? A: Critical substitution parameters are: positive output configuration, adjustable output type, 100mA output current rating, 1.2V minimum and 37V maximum output voltage capability, TO-92-3 package, through-hole mounting, and integrated over-current, over-temperature, and short-circuit protection. Deviations in these parameters indicate incompatibility.

Q: Can I use LM217LZ-TR as a substitute? A: LM217LZ-TR is functionally compatible with identical voltage ratings and current output. However, it lacks documented over-current protection compared to the LM317LBZRA specification. Verify protection feature requirements before substitution in critical applications.