LP2951CMM Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP2951CMM is a linear voltage regulator IC from Texas Instruments designed for positive adjustable (fixed) output applications. This Surface Mount device delivers 100mA output current in an 8-VSSOP package and operates across an input voltage range of up to 30V with output adjustability from 1.235V to 29V. The main part carries a Last Time Buy product status, making identification of active equivalent and substitute parts essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
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)	29V
Voltage Dropout (Max)	0.6V @ 100mA
Current - Output	100mA
Current - Quiescent (Iq)	120 µA
Current - Supply (Max)	14 mA
Control Features	Enable
Protection Features	Over Current, Over Temperature, Short Circuit
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package	8-VSSOP
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the LP2951CMM is determined by strict equivalence across all electrical and mechanical parameters. The following criteria establish valid substitution relationships:

Critical Substitution Parameters:

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): 29V
Voltage Dropout (Max): 0.6V @ 100mA
Current - Output: 100mA
Current - Quiescent (Iq): 120 µA
Current - Supply (Max): 14 mA
Control Features: Enable
Protection Features: Over Current, Over Temperature, Short Circuit
Operating Temperature: -40°C ~ 125°C (TJ)
Mounting Type: Surface Mount
Package / Case: 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Supplier Device Package: 8-VSSOP
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

All substitute parts listed maintain identical electrical performance and mechanical compatibility. Differences exist only in packaging format (Tape & Reel versus Cut Tape & Digi-Reel) and product status (Active versus Last Time Buy).

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Inventory (Pcs)	Output (mA)	Iq (µA)	Dropout (V)	Temp Range (°C)	Package
LP2951CMM	Texas Instruments	Last Time Buy	-	6,082	100	120	0.6 @ 100mA	-40 ~ 125	8-VSSOP
LP2951CMM/NOPB	Texas Instruments	Active	Tape & Reel (TR)	12,000	100	120	0.6 @ 100mA	-40 ~ 125	8-VSSOP
LP2951ACMM	Texas Instruments	Last Time Buy	Cut Tape (CT) & Digi-Reel®	29,751	100	120	0.6 @ 100mA	-40 ~ 125	8-VSSOP
LP2951ACMM/NOPB	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	27,090	100	120	0.6 @ 100mA	-40 ~ 125	8-VSSOP
LP2951ACMMX/NOPB	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	6,400	100	120	0.6 @ 100mA	-40 ~ 125	8-VSSOP
LP2951CMMX/NOPB	Texas Instruments	Active	Cut Tape (CT) & Digi-Reel®	1,756	100	120	0.6 @ 100mA	-40 ~ 125	8-VSSOP

Engineering Selection Recommendations

For Active Product Status Requirement: LP2951CMM/NOPB is the direct substitute with Active product status and Tape & Reel packaging. This part maintains full electrical and mechanical equivalence while providing ongoing manufacturer support and availability assurance.

For Extended Inventory Availability: LP2951ACMM and LP2951ACMM/NOPB offer significantly higher inventory levels (29,751 and 27,090 units respectively) compared to the main part (6,082 units). Both are parametrically equivalent and available in Cut Tape & Digi-Reel packaging format.

For ROHS3 Compliance and REACH Unaffected Status: All substitute parts maintain identical ROHS3 Compliant and REACH Unaffected certifications, ensuring regulatory compliance across all substitution options.

For Moisture Sensitivity Considerations: All parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Frequently Asked Questions (FAQ)

Q: Can LP2951CMM/NOPB replace LP2951CMM in existing designs? A: Yes. LP2951CMM/NOPB is electrically and mechanically identical to LP2951CMM. The only differences are packaging format (Tape & Reel versus standard) and product status (Active versus Last Time Buy). Both are 8-VSSOP Surface Mount devices with identical electrical specifications.

Q: What is the difference between LP2951ACMM and LP2951CMM? A: Both parts are parametrically equivalent with identical electrical performance and 8-VSSOP packaging. The primary difference is product status: LP2951CMM is Last Time Buy while LP2951ACMM is Last Time Buy. LP2951ACMM/NOPB (Active status) is the recommended long-term substitute.

Q: Are the /NOPB variants functionally equivalent to non-/NOPB versions? A: Yes. The /NOPB designation indicates lead-free (no lead) compliance. Electrical and mechanical specifications remain identical between /NOPB and standard versions.

Q: Does packaging format (Tape & Reel vs. Cut Tape & Digi-Reel) affect electrical performance? A: No. Packaging format affects only procurement and handling logistics. Electrical specifications, thermal performance, and protection features are identical across all packaging options.

Q: Which substitute part offers the best long-term availability? A: LP2951ACMM/NOPB carries Active product status with 27,090 units in inventory, providing the strongest availability assurance for ongoing production requirements.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 Compliant status and REACH Unaffected certification, meeting current environmental and regulatory requirements.

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