LP2950CZ-3.0G Equivalent & Substitute Parts

Part Overview

The LP2950CZ-3.0G is a linear voltage regulator IC from onsemi, delivering a fixed 3V positive output at 100mA in a TO-92-3 through-hole package. This micropower voltage regulator is designed for applications requiring low-dropout regulation with integrated over-current and over-temperature protection. The part is currently in active production status with 2593 units in stock. Substitute parts are necessary when the primary part becomes unavailable, when alternative manufacturers are preferred for supply chain diversification, or when packaging variants are required for specific assembly processes.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	3V
Output Current	100mA
Input Voltage (Max)	30V
Dropout Voltage (Max)	0.45V @ 100mA
Quiescent Current	120 µA
Operating Temperature Range	-40°C to 125°C
Package Type	TO-92-3 (TO-226)
Mounting Type	Through Hole
Protection Features	Over Current, Over Temperature

Substitute Part Grouping Explanation

Substitution eligibility for the LP2950CZ-3.0G is determined by the following critical parameters: fixed output voltage of 3V, output current capability of 100mA, maximum input voltage of 30V, through-hole TO-92-3 package configuration, and operating temperature range of -40°C to 125°C. All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional interchangeability in circuit applications. Variations in dropout voltage (0.45V to 0.6V), quiescent current (120 µA), and supply current (12mA to 14mA) remain within acceptable tolerances for this regulator class. Packaging variants include bulk and cut-tape options; both are compatible with through-hole assembly processes.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Package	Product Status	Inventory
LP2950CZ-3.0G	onsemi	3V	100mA	30V	0.45V @ 100mA	120 µA	TO-92-3	Active	2593 Pcs
LP2950ACZ-3.0G	onsemi	3V	100mA	30V	0.45V @ 100mA	120 µA	TO-92-3	Active	28279 Pcs
LP2950CZ-3.0/NOPB	National Semiconductor	3V	100mA	30V	0.6V @ 100mA	120 µA	TO-92-3	Active	1800 Pcs
LP2950-30LP	Texas Instruments	3V	100mA	30V	0.6V @ 100mA	120 µA	TO-92-3	Last Time Buy	2540 Pcs
LP2950-30LPR	Texas Instruments	3V	100mA	30V	0.6V @ 100mA	120 µA	TO-92-3	Last Time Buy	5300 Pcs
LP2950ACZ-3.0/NOPB	Texas Instruments	3V	100mA	30V	0.6V @ 100mA	120 µA	TO-92-3	Active	1900 Pcs

Engineering Selection Recommendations

For new designs and active production, LP2950ACZ-3.0G (onsemi) is the preferred substitute, offering the lowest dropout voltage specification (0.45V @ 100mA) matching the primary part, active product status, and the highest inventory availability (28279 units). This part is functionally identical to LP2950CZ-3.0G with equivalent electrical performance and RoHS3 compliance.

LP2950CZ-3.0/NOPB (National Semiconductor) and LP2950ACZ-3.0/NOPB (Texas Instruments) are direct alternatives with active status and adequate inventory. These parts specify 0.6V dropout voltage, which remains acceptable for most applications but represents a 0.15V increase compared to the primary part.

LP2950-30LP and LP2950-30LPR (Texas Instruments) are functionally equivalent but carry Last Time Buy status, indicating discontinued production. These parts should be selected only when existing inventory commitments require their use or when supply chain redundancy is necessary. LP2950-30LPR offers the advantage of cut-tape packaging and includes short-circuit protection in addition to over-current and over-temperature protection.

All substitute parts maintain RoHS3 compliance, REACH unaffected status, and identical operating temperature ranges (-40°C to 125°C). Selection should prioritize active product status and current manufacturer support for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can LP2950ACZ-3.0G replace LP2950CZ-3.0G directly?

A: Yes. LP2950ACZ-3.0G is a parametric equivalent with identical output voltage (3V), output current (100mA), input voltage rating (30V), quiescent current (120 µA), operating temperature range (-40°C to 125°C), and TO-92-3 package configuration. The dropout voltage specification is identical at 0.45V @ 100mA. No circuit modifications are required.

Q: What is the difference between bulk and cut-tape packaging?

A: Bulk packaging (LP2950CZ-3.0/NOPB, LP2950ACZ-3.0/NOPB) is supplied loose in containers, suitable for manual assembly or tape-and-reel conversion. Cut-tape packaging (LP2950-30LPR) is pre-formed on carrier tape with formed leads, optimized for automated pick-and-place assembly. Both are through-hole components; packaging selection depends on assembly process requirements.

Q: Why do some substitutes specify 0.6V dropout voltage instead of 0.45V?

A: Dropout voltage variation reflects manufacturing process differences between onsemi and Texas Instruments/National Semiconductor. The 0.15V difference remains within acceptable tolerance for 3V regulator applications. Applications with tight input voltage margins should verify dropout voltage specifications against circuit requirements.

Q: Are Last Time Buy parts suitable for new production?

A: Last Time Buy status indicates discontinued production. LP2950-30LP and LP2950-30LPR should not be selected for new designs requiring long-term supply availability. These parts are appropriate only for sustaining production of existing designs or when existing inventory is committed.

Q: Do all substitute parts include the same protection features?

A: Most substitutes include over-current and over-temperature protection. LP2950-30LPR additionally includes short-circuit protection. This enhanced protection does not affect interchangeability; it represents an additional safety feature in the Texas Instruments variant.

Q: What compliance certifications apply to all substitute parts?

A: All parts listed are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 with HTSUS code 8542.39.0001. Moisture sensitivity level is not applicable for all variants.

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