LP2951CDMR2 Equivalent & Substitute Parts

Part Overview

The LP2951CDMR2 is a linear voltage regulator IC from onsemi designed for positive adjustable (fixed) output applications with 100mA output current capability in an 8-MSOP surface mount package. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The LP2951 series provides regulated output voltage from 1.235V to 30V with integrated over-current and over-temperature protection, suitable for low-power supply applications requiring compact form factors.

Substiute Parts

LP2951CDMR2

onsemiIn Stock: 3641LP2951CDMR2 Datasheet

Current PartRFQ

LP2951CDMR2G

onsemiIn Stock: 48250LP2951CDMR2G Datasheet

DirectRFQ

LP2951ACDMR2G

onsemiIn Stock: 3447LP2951ACDMR2G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the LP2951CDMR2 are qualified based on strict electrical and mechanical parameter matching within the LP2951 product family. The substitution criteria are:

Electrical Parameters (Must Match):

• Output configuration: Positive
• Output type: Adjustable (Fixed)
• Number of regulators: 1
• Voltage - Input (Max): 30V
• Voltage - Output (Min/Fixed): 1.235V (5V)
• Voltage - Output (Max): 30V
• Voltage Dropout (Max): 0.45V @ 100mA
• Current - Output: 100mA
• Current - Quiescent (Iq): 120 µA
• Current - Supply (Max): 12 mA
• Protection Features: Over Current, Over Temperature
• Operating Temperature: -40°C ~ 125°C

Mechanical Parameters (Must Match):

• Mounting Type: Surface Mount
• Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
• Supplier Device Package: 8-MSOP

All identified substitutes meet these criteria and are manufactured by onsemi within the LP2951 base product family.

Parameter Comparison

Engineering Selection Recommendations

LP2951CDMR2G is the primary direct substitute for the obsolete LP2951CDMR2. Both parts are electrically and mechanically identical with matching electrical specifications. The LP2951CDMR2G is actively produced and available in higher inventory quantities (48200 Pcs). The key difference is packaging format: LP2951CDMR2G is supplied in Tape & Reel (TR) format, which is standard for automated assembly processes. Additionally, LP2951CDMR2G meets ROHS3 compliance requirements, whereas the original LP2951CDMR2 is RoHS non-compliant.

LP2951ACDMR2G is a parametric equivalent offering identical electrical performance and the same 8-MSOP package footprint. This part is also actively produced and ROHS3 compliant. The LP2951ACDMR2G is supplied in Cut Tape (CT) & Digi-Reel® format, suitable for lower-volume or manual assembly applications. Selection between LP2951CDMR2G and LP2951ACDMR2G depends on production volume and assembly methodology rather than electrical performance.

For new designs and production transitions from the obsolete LP2951CDMR2, either active substitute is suitable based on packaging and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can LP2951CDMR2G and LP2951ACDMR2G be used interchangeably with LP2951CDMR2?

A: Yes. All three parts share identical electrical specifications including output voltage range (1.235V to 30V), output current (100mA), dropout voltage (0.45V @ 100mA), and protection features. The 8-MSOP package footprint is identical across all variants, enabling direct PCB-level substitution.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging is used for high-volume automated assembly with pick-and-place equipment. Cut Tape (CT) & Digi-Reel® packaging is suitable for lower volumes or manual assembly processes. Both formats contain the same component in the same 8-MSOP package; the difference is in the carrier format and quantity per reel.

Q: Why is the original LP2951CDMR2 marked as obsolete?

A: The LP2951CDMR2 has been superseded by actively produced variants (LP2951CDMR2G and LP2951ACDMR2G) that offer improved compliance status (ROHS3) and better supply chain availability. The electrical performance remains unchanged across the product family.

Q: Are there any compliance differences between the three parts?

A: Yes. The original LP2951CDMR2 is RoHS non-compliant. Both substitute parts (LP2951CDMR2G and LP2951ACDMR2G) are ROHS3 compliant. All three parts are REACH Unaffected and classified under ECCN EAR99. For applications requiring RoHS compliance, only LP2951CDMR2G or LP2951ACDMR2G are suitable.

Q: Which substitute should I select for new production?

A: LP2951CDMR2G is recommended for high-volume automated assembly due to Tape & Reel packaging and superior inventory availability (48200 Pcs). LP2951ACDMR2G is suitable for lower-volume or manual assembly processes. Both are electrically identical and ROHS3 compliant.