LP2951ACDMR2 Linear Voltage Regulator - Equivalent & Substitute Parts

Part Overview

The LP2951ACDMR2 is a linear voltage regulator IC from onsemi, designed for positive adjustable (fixed) output applications with a maximum output current of 100mA. This device operates across an input voltage range of up to 30V and provides output voltage adjustment from 1.235V to 30V, with integrated over-current and over-temperature protection features.

The LP2951ACDMR2 is classified as obsolete. Equivalent and substitute parts are available in active product status, offering identical electrical performance with improved availability and compliance certifications.

Key Parameters

Parameter	Value
Manufacturer	onsemi
Category	Power Management (PMIC)
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
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-MSOP
Base Product Number	LP2951

Substitute Part Grouping Explanation

Substitution of the LP2951ACDMR2 is determined by electrical and mechanical parameter equivalence across the LP2951 product family. All substitute parts maintain identical specifications for:

Output configuration (Positive)
Output type (Adjustable/Fixed)
Voltage ratings (Input Max: 30V, Output Min/Fixed: 1.235V/5V, Output Max: 30V)
Current specifications (Output: 100mA, Quiescent: 120 µA, Supply Max: 12 mA)
Dropout voltage (0.45V @ 100mA)
Protection features (Over Current, Over Temperature)
Operating temperature range (-40°C ~ 125°C)
Package type (8-MSOP)
Mounting type (Surface Mount)

Substitutes differ only in product status, packaging format (Cut Tape & Digi-Reel vs. Tape & Reel), and compliance certifications (RoHS status).

Parameter Comparison

Parameter	LP2951ACDMR2	LP2951ACDMR2G	LP2951CDMR2G
Manufacturer	onsemi	onsemi	onsemi
Product Status	Obsolete	Active	Active
Output Configuration	Positive	Positive	Positive
Output Type	Adjustable (Fixed)	Adjustable (Fixed)	Adjustable (Fixed)
Voltage - Input (Max)	30V	30V	30V
Voltage - Output (Min/Fixed)	1.235V (5V)	1.235V (5V)	1.235V (5V)
Voltage - Output (Max)	30V	30V	30V
Voltage Dropout (Max)	0.45V @ 100mA	0.45V @ 100mA	0.45V @ 100mA
Current - Output	100mA	100mA	100mA
Current - Quiescent (Iq)	120 µA	120 µA	120 µA
Current - Supply (Max)	12 mA	12 mA	12 mA
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-MSOP	8-MSOP	8-MSOP
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	-	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)
Inventory Status	652 Pcs New Original In Stock	3350 Pcs New Original In Stock	48200 Pcs New Original In Stock

Engineering Selection Recommendations

The LP2951ACDMR2 is obsolete and should be replaced with active alternatives from the LP2951 family. Both LP2951ACDMR2G and LP2951CDMR2G are functionally equivalent and maintain identical electrical performance specifications.

LP2951ACDMR2G is recommended for applications requiring Cut Tape or Digi-Reel packaging formats with ROHS3 compliance certification.

LP2951CDMR2G is recommended for high-volume production requiring Tape & Reel packaging with ROHS3 compliance certification and maximum inventory availability.

Both substitute parts carry REACH Unaffected status and EAR99 export classification, matching the original part's regulatory profile.

Frequently Asked Questions (FAQ)

Q: Are LP2951ACDMR2G and LP2951CDMR2G electrically interchangeable with LP2951ACDMR2?

A: Yes. All three parts share identical electrical specifications including voltage ratings, current ratings, dropout voltage, protection features, and operating temperature range. They are pin-compatible and functionally equivalent.

Q: What is the primary difference between LP2951ACDMR2G and LP2951CDMR2G?

A: The primary difference is packaging format. LP2951ACDMR2G is supplied in Cut Tape (CT) and Digi-Reel format, while LP2951CDMR2G is supplied in Tape & Reel (TR) format. LP2951CDMR2G also offers significantly higher inventory availability (48200 pcs vs. 3350 pcs).

Q: Can I use LP2951CDMR2G in place of LP2951ACDMR2G?

A: Yes, provided your assembly process accommodates Tape & Reel packaging. Both parts are electrically and mechanically identical, with the same 8-MSOP package footprint.

Q: Why is RoHS compliance important for this substitution?

A: The original LP2951ACDMR2 is RoHS non-compliant. Both substitute parts (LP2951ACDMR2G and LP2951CDMR2G) are ROHS3 compliant, meeting current environmental and regulatory requirements for component procurement and assembly.

Q: Are there any thermal or performance differences between these parts?

A: No. All three parts maintain identical thermal specifications, including quiescent current (120 µA), maximum supply current (12 mA), and operating temperature range (-40°C ~ 125°C).

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