LP2950CZ-3.0RAG Equivalent & Substitute Parts

Part Overview

The LP2950CZ-3.0RAG 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 regulator is designed for applications requiring low-dropout regulation with integrated over-current and over-temperature protection across the -40°C to 125°C operating range. The part is currently in active production status with 2759 units in stock. Substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required, or when sourcing from multiple manufacturers is needed for supply chain resilience.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility for the LP2950CZ-3.0RAG is determined by the following critical parameters: fixed 3V output voltage, 100mA output current capability, 30V maximum input voltage, TO-92-3 through-hole package configuration, and -40°C to 125°C operating temperature range. All substitute parts listed maintain these core electrical and mechanical specifications. Variations in dropout voltage (0.45V to 0.6V), quiescent current (120 µA constant), and supply current (12mA to 14mA) remain within acceptable tolerances for this regulator class. Protection features across all parts include over-current and over-temperature protection, with one variant adding short-circuit protection. Packaging format remains consistent as TO-92-3 through-hole across all alternatives.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Dropout (Max)	Iq	Package	Status	Inventory
LP2950CZ-3.0RAG	onsemi	3V	100mA	0.45V @ 100mA	120 µA	TO-92-3	Active	2759 Pcs
LP2950ACZ-3.0RAG	onsemi	3V	100mA	0.45V @ 100mA	120 µA	TO-92-3	Active	2920 Pcs
LP2950-30LP	Texas Instruments	3V	100mA	0.6V @ 100mA	120 µA	TO-92-3	Last Time Buy	2540 Pcs
LP2950-30LPR	Texas Instruments	3V	100mA	0.6V @ 100mA	120 µA	TO-92-3	Last Time Buy	5300 Pcs
LP2950CZ-3.0/NOPB	National Semiconductor	3V	100mA	0.6V @ 100mA	120 µA	TO-92-3	Active	1800 Pcs

Engineering Selection Recommendations

LP2950ACZ-3.0RAG from onsemi is the primary parametric equivalent, offering identical electrical specifications and the same 0.45V dropout voltage as the main part. Both onsemi variants maintain active product status with ROHS3 compliance and REACH unaffected certification.

LP2950-30LPR from Texas Instruments provides the highest inventory availability at 5300 units and includes short-circuit protection in addition to over-current and over-temperature protection. However, this part carries Last Time Buy status and exhibits 0.6V dropout voltage compared to 0.45V on the primary part. The increased dropout voltage may impact applications with tight input-to-output voltage margins.

LP2950-30LP from Texas Instruments is available in bulk packaging with 2540 units in stock but also carries Last Time Buy status with 0.6V dropout voltage.

LP2950CZ-3.0/NOPB from National Semiconductor maintains active status with 1800 units available and 0.6V dropout voltage. This variant is supplied in bulk packaging format.

All substitute parts maintain identical output current (100mA), quiescent current (120 µA), input voltage rating (30V max), operating temperature range (-40°C to 125°C), and TO-92-3 through-hole package configuration. Selection should prioritize active status parts and consider dropout voltage requirements for the specific application circuit.

Frequently Asked Questions (FAQ)

Q: Can LP2950-30LP or LP2950-30LPR be used as direct replacements for LP2950CZ-3.0RAG?

A: Yes, both Texas Instruments variants are electrically compatible. All three parts deliver 3V at 100mA with identical quiescent current and operating temperature range. The primary difference is dropout voltage: LP2950CZ-3.0RAG specifies 0.45V while the TI variants specify 0.6V. Applications with input voltages close to the 3V output requirement should account for this 0.15V difference. Both TI parts carry Last Time Buy status, indicating limited future availability.

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

A: Both are onsemi products with identical electrical specifications and 0.45V dropout voltage. The primary difference is inventory availability: LP2950ACZ-3.0RAG has 2920 units in stock versus 2759 for LP2950CZ-3.0RAG. Both maintain active product status and ROHS3 compliance.

Q: Does packaging format differ between these substitute parts?

A: All substitute parts use TO-92-3 through-hole packaging. The primary distinction is in supply format: LP2950-30LP and LP2950CZ-3.0/NOPB are supplied in bulk packaging, while LP2950CZ-3.0RAG, LP2950ACZ-3.0RAG, and LP2950-30LPR are supplied in cut tape format. This affects handling and automated assembly compatibility but not electrical performance.

Q: Which substitute part offers the best long-term availability?

A: LP2950ACZ-3.0RAG and LP2950CZ-3.0/NOPB both maintain active product status. LP2950ACZ-3.0RAG from onsemi is recommended as the primary alternative due to identical dropout voltage specification and higher inventory levels compared to the National Semiconductor variant.

Q: Are there protection feature differences between substitute parts?

A: All parts include over-current and over-temperature protection. LP2950-30LPR additionally includes short-circuit protection. This enhanced protection does not affect pin compatibility or electrical interface but provides additional circuit safeguarding in fault conditions.

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