LM317LBDR2G Equivalent & Substitute Parts

Part Overview

The LM317LBDR2G is a linear voltage regulator IC from onsemi designed for positive adjustable output applications. This Surface Mount device delivers 100mA output current with adjustable voltage regulation from 1.2V to 37V, operating across the industrial temperature range of -40°C to 125°C. The part is currently Active in production status with extensive inventory availability (885,200 pcs). Substitute parts are necessary when addressing supply constraints, specific thermal requirements, or when alternative manufacturer sourcing is required for procurement flexibility.

Substiute Parts

LM317LBDR2G

onsemiIn Stock: 885259LM317LBDR2G Datasheet

Current PartRFQ

LM217LD13TR

STMicroelectronicsIn Stock: 40567LM217LD13TR Datasheet

DirectRFQ

LM317LD13TR

STMicroelectronicsIn Stock: 886604LM317LD13TR Datasheet

DirectRFQ

LM317LIDR

Texas InstrumentsIn Stock: 10194LM317LIDR Datasheet

DirectRFQ

LM317LMX

onsemiIn Stock: 6224LM317LMX Datasheet

Parametric EquivalentRFQ

LM317LMX/NOPB

Texas InstrumentsIn Stock: 870111LM317LMX/NOPB Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LM317LBDR2G is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Output Configuration: Positive Adjustable
• Number of Regulators: 1
• Current - Output: 100mA
• Voltage - Input (Max): 40V minimum
• Voltage - Output Range: 1.2V to 37V minimum
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount

Acceptable Variations:

• Current - Quiescent (Iq): May vary (2.5mA to 10mA acceptable)
• PSRR: May vary within 65dB to 80dB range
• Operating Temperature: May be narrower than -40°C ~ 125°C
• Protection Features: May include subset of Over Current, Over Temperature, Short Circuit
• Manufacturer: Different manufacturers acceptable if electrical parameters align

Non-Substitutable Parameters:

• Package type must remain 8-SOIC
• Output current must remain 100mA
• Adjustable output configuration must be maintained

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Fully Compatible):

LM317LD13TR (STMicroelectronics) and LM317LMX/NOPB (Texas Instruments) are direct substitutes meeting all electrical parameters of the LM317LBDR2G. Both maintain 40V maximum input voltage, 37V maximum output voltage, and full protection feature set. Both are Active products with ROHS3 compliance and MSL 1 rating. LM317LD13TR operates from 0°C to 125°C, while LM317LMX/NOPB maintains the full -40°C to 125°C range.

Conditional Substitutes (Application-Dependent):

LM317LIDR (Texas Instruments) is substitutable for applications where maximum output voltage of 32V is acceptable and maximum input voltage of 38V is sufficient. This part offers superior quiescent current performance (2.5mA) and maintains full temperature range operation (-40°C to 125°C). Use this part when lower power consumption is a design requirement.

LM217LD13TR (STMicroelectronics) is substitutable for applications not requiring Over Current protection. This part maintains all other electrical parameters and operates across the full -40°C to 125°C temperature range. Verify circuit design does not depend on Over Current protection functionality.

Not Recommended:

LM317LMX (onsemi) is Obsolete status and should not be selected for new designs despite parametric equivalence. Inventory availability is limited (6,200 pcs) compared to Active alternatives.

Frequently Asked Questions (FAQ)

Q: Can I use LM317LIDR as a direct replacement for LM317LBDR2G?

A: LM317LIDR is electrically compatible for most applications. However, verify that your circuit design does not require output voltages exceeding 32V, as LM317LIDR maximum output is 32V versus 37V for LM317LBDR2G. Maximum input voltage is also reduced to 38V. If your application operates within these limits, LM317LIDR is a valid substitute with improved quiescent current characteristics.

Q: What is the difference between LM317LD13TR and LM317LMX/NOPB?

A: Both are fully compatible with LM317LBDR2G electrically. LM317LD13TR (STMicroelectronics) operates from 0°C to 125°C, while LM317LMX/NOPB (Texas Instruments) operates from -40°C to 125°C. Select based on your application's minimum operating temperature requirement. Both are Active products with equivalent inventory availability.

Q: Why is LM217LD13TR listed as a substitute if it lacks Over Current protection?

A: LM217LD13TR maintains all critical electrical parameters: 100mA output, 40V input maximum, 37V output maximum, and 8-SOIC package. It includes Over Temperature and Short Circuit protection. Use this part only if your circuit design does not depend on Over Current protection functionality. Verify application requirements before selection.

Q: Can I use LM317LMX for new production designs?

A: No. LM317LMX is Obsolete status and should not be used for new designs. Although parametric equivalence exists, Active alternatives with better long-term availability are available: LM317LD13TR, LM317LMX/NOPB, and LM317LIDR.

Q: Are all substitute parts in the same 8-SOIC package?

A: Yes. All listed substitutes use the 8-SOIC (0.154", 3.90mm Width) Surface Mount package. Direct PCB layout compatibility is maintained across all parts.

Q: What compliance certifications apply to all substitutes?

A: All Active substitute parts (LM217LD13TR, LM317LD13TR, LM317LIDR, LM317LMX/NOPB) are ROHS3 Compliant with MSL 1 (Unlimited) moisture sensitivity rating. REACH status is Unaffected for all parts. Verify specific compliance requirements for your application before final selection.