LP2950-30LPR Equivalent & Substitute Parts

Part Overview

The LP2950-30LPR is a linear voltage regulator IC from Texas Instruments designed for positive fixed 3V output at 100mA in a TO-92-3 through-hole package. This device is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts ensures design continuity and supply chain flexibility for applications requiring 3V regulation with 100mA output capacity.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3V
Output Current	100mA
Input Voltage (Max)	30V
Voltage Dropout (Max)	0.6V @ 100mA
Quiescent Current	120 µA
Operating Temperature Range	-40°C ~ 125°C
Package Type	TO-92-3 (Through Hole)
Protection Features	Over Current, Over Temperature, Short Circuit
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the LP2950-30LPR are categorized based on the following criteria:

Parametric Equivalents maintain identical electrical specifications: 3V fixed output, 100mA current capacity, 30V maximum input, 0.6V dropout voltage, 120 µA quiescent current, and -40°C to 125°C operating range. These parts differ only in packaging format (Cut Tape vs. Bulk) or manufacturer source.

Manufacturer Recommended Substitutes from Texas Instruments and onsemi meet the core functional requirements but may vary in secondary parameters such as dropout voltage (0.45V for onsemi variants), quiescent current optimization, or supply current specifications. All maintain 3V output, 100mA capacity, and through-hole TO-92-3 packaging.

Enhanced Performance Alternative (TPS70930DBVR) offers higher output current (150mA) and superior quiescent current (2.05 µA) but requires surface-mount SOT-23-5 packaging and introduces additional control features (Enable pin, UVLO). This part is suitable only for designs that can accommodate SMD assembly.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout Voltage	Quiescent Current	Package Type	Product Status	Inventory
LP2950-30LPR	Texas Instruments	3V	100mA	0.6V @ 100mA	120 µA	TO-92-3 (Through Hole)	Last Time Buy	5300 Pcs
LP2950-30LPRE3	Texas Instruments	3V	100mA	0.6V @ 100mA	120 µA	TO-92-3 (Through Hole)	Last Time Buy	7198 Pcs
LP2950ACZ-3.0/NOPB	Texas Instruments	3V	100mA	0.6V @ 100mA	120 µA	TO-92-3 (Through Hole)	Active	1900 Pcs
LP2950ACZ-3.0G	onsemi	3V	100mA	0.45V @ 100mA	120 µA	TO-92-3 (Through Hole)	Active	28279 Pcs
LP2950ACZ-3.0RAG	onsemi	3V	100mA	0.45V @ 100mA	120 µA	TO-92-3 (Through Hole)	Active	2920 Pcs
LP2950CZ-3.0G	onsemi	3V	100mA	0.45V @ 100mA	120 µA	TO-92-3 (Through Hole)	Active	2593 Pcs
LP2950CZ-3.0RAG	onsemi	3V	100mA	0.45V @ 100mA	120 µA	TO-92-3 (Through Hole)	Active	2759 Pcs
TPS70930DBVR	Texas Instruments	3V	150mA	1.4V @ 150mA	2.05 µA	SOT-23-5 (Surface Mount)	Active	36145 Pcs

Engineering Selection Recommendations

Direct Replacement (Through-Hole TO-92-3): For applications requiring pin-for-pin compatibility and through-hole mounting, select from the LP2950 series variants. The onsemi-manufactured parts (LP2950ACZ-3.0G, LP2950ACZ-3.0RAG, LP2950CZ-3.0G, LP2950CZ-3.0RAG) offer Active product status with superior dropout voltage (0.45V vs. 0.6V) and higher inventory availability. These are preferred for new designs and long-term supply assurance.

Texas Instruments Active Alternative: LP2950ACZ-3.0/NOPB maintains Texas Instruments sourcing with Active status, though inventory is limited (1900 Pcs). This option is suitable if manufacturer continuity is required.

Last Time Buy Consideration: LP2950-30LPRE3 shares Last Time Buy status with the primary part but offers higher inventory (7198 Pcs). Use this only if immediate supply is critical and long-term availability is not a design constraint.

Surface-Mount Alternative: TPS70930DBVR is suitable only for designs that can accommodate SMD assembly. It provides higher current capacity (150mA) and significantly lower quiescent current (2.05 µA), beneficial for battery-powered applications. However, the higher dropout voltage (1.4V @ 150mA) may impact efficiency in low-input-voltage scenarios.

All recommended parts are ROHS3 compliant and operate across the -40°C to 125°C temperature range.

Frequently Asked Questions (FAQ)

Q: Can LP2950ACZ-3.0G directly replace LP2950-30LPR?

A: Yes. Both devices provide 3V fixed output at 100mA with identical quiescent current (120 µA) and operating temperature range (-40°C to 125°C). The onsemi variant features improved dropout voltage (0.45V vs. 0.6V) and maintains TO-92-3 through-hole packaging. No circuit modifications are required.

Q: What is the difference between LP2950ACZ-3.0G and LP2950CZ-3.0G?

A: Both are onsemi-manufactured LP2950 variants with identical electrical specifications and TO-92-3 packaging. The designation difference reflects internal manufacturing or qualification variations. Electrical performance and pinout are equivalent.

Q: Why does TPS70930DBVR have higher dropout voltage despite being a newer device?

A: TPS70930DBVR is optimized for surface-mount assembly (SOT-23-5) and includes additional features (Enable pin, UVLO protection, 80dB PSRR). The higher dropout voltage (1.4V @ 150mA) reflects its design for higher current delivery. It is not a direct replacement for through-hole applications.

Q: Are onsemi LP2950 variants fully compatible with Texas Instruments versions?

A: Yes. All LP2950 variants (Texas Instruments and onsemi) share identical pinout, output voltage (3V), output current (100mA), input voltage rating (30V max), and operating temperature range. Dropout voltage differences (0.45V vs. 0.6V) are within acceptable tolerance for most applications.

Q: What is the advantage of selecting an Active status part over Last Time Buy?

A: Active status parts guarantee continued manufacturing and long-term availability. Last Time Buy parts have limited production windows and no future replenishment. For new designs or long-term production, Active status parts (onsemi LP2950 variants) provide supply chain security.

Q: Can I use LP2950ACZ-3.0/NOPB in a design originally specified for LP2950-30LPR?

A: Yes. Both are Texas Instruments LP2950 variants with identical electrical specifications and TO-92-3 packaging. The /NOPB designation indicates lead-free (Pb-free) compliance. No design changes are required.

Q: What packaging format should I select: Bulk or Cut Tape?

A: Cut Tape (CT) packaging is suitable for automated assembly and reel-based pick-and-place operations. Bulk packaging is appropriate for manual assembly or small-volume prototyping. Electrical specifications are identical; selection depends on assembly process requirements.

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