LP2950ACZ-5.0RAG Equivalent & Substitute Parts

Part Overview

The LP2950ACZ-5.0RAG is a linear voltage regulator IC manufactured by onsemi, delivering a fixed 5V positive output at 100mA in a TO-92-3 through-hole package. This device is classified as an active product and is ROHS3 compliant. Alternative equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility across multiple manufacturers is required for production optimization.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	100mA
Input Voltage (Max)	30V
Voltage Dropout (Max)	0.45V @ 100mA
Quiescent Current (Iq)	120 µA
Operating Temperature Range	-40°C ~ 125°C
Package Type	TO-92-3 (TO-226-3)
Mounting Type	Through Hole
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LP2950ACZ-5.0RAG is determined by strict parameter matching across the following criteria:

Critical Parameters for Substitution:

Fixed output voltage of 5V
Output current rating of 100mA minimum
Maximum input voltage of 30V or greater
Operating temperature range of -40°C to 125°C or wider
TO-92-3 or TO-226-3 package compatibility
Through-hole mounting configuration
ROHS3 compliance and active product status

Parametric Equivalents (onsemi LP2950 series variants) maintain identical electrical specifications and base product lineage, differing only in packaging designations or tape configurations.

Similar Substitutes (STMicroelectronics L78L05 and Texas Instruments LP2950 variants) meet all critical electrical and mechanical parameters while originating from different manufacturers. These parts satisfy functional requirements within the specified parameter envelope.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Iq (Quiescent)	Operating Temp	Package	RoHS Status	Inventory
LP2950ACZ-5.0RAG	onsemi	5V	100mA	30V	0.45V @ 100mA	120 µA	-40°C ~ 125°C	TO-92-3	ROHS3	100200 Pcs
LP2950CZ-5.0RAG	onsemi	5V	100mA	30V	0.45V @ 100mA	120 µA	-40°C ~ 125°C	TO-92-3	ROHS3	2191 Pcs
LP2950CZ-5.0RPG	onsemi	5V	100mA	30V	0.45V @ 100mA	120 µA	-40°C ~ 125°C	TO-92-3	ROHS3	2626 Pcs
L78L05ABZ-AP	STMicroelectronics	5V	100mA	30V	Not specified	5.5 mA	-40°C ~ 125°C	TO-92-3	ROHS3	7173 Pcs
L78L05ABZ-TR	STMicroelectronics	5V	100mA	30V	Not specified	5.5 mA	-40°C ~ 125°C	TO-92-3	ROHS3	23389 Pcs
LP2950-50LPRE3	Texas Instruments	5V	100mA	30V	0.6V @ 100mA	120 µA	-40°C ~ 125°C	TO-92-3	ROHS3	37200 Pcs
LP2950ACZ-5.0/LFT7	Texas Instruments	5V	100mA	30V	0.6V @ 100mA	120 µA	-40°C ~ 125°C	TO-92-3	ROHS3	5314 Pcs
LP2950CZ-5.0/LFT1	Texas Instruments	5V	100mA	30V	0.6V @ 100mA	120 µA	-40°C ~ 125°C	TO-92-3	ROHS3	2100 Pcs
LP2950CZ-5.0/LFT3	Texas Instruments	5V	100mA	30V	0.6V @ 100mA	120 µA	-40°C ~ 125°C	TO-92-3	ROHS3	6166 Pcs
LP2950CZ-5.0/LFT7	Texas Instruments	5V	100mA	30V	0.6V @ 100mA	120 µA	-40°C ~ 125°C	TO-92-3	ROHS3	8373 Pcs

Engineering Selection Recommendations

onsemi Parametric Equivalents (LP2950CZ-5.0RAG, LP2950CZ-5.0RPG): These variants maintain identical electrical performance and dropout voltage specifications as the primary part. Selection is appropriate when maintaining the original manufacturer lineage is preferred. Both parts carry active product status and ROHS3 compliance.

Texas Instruments LP2950 Series (LP2950-50LPRE3, LP2950ACZ-5.0/LFT7, LP2950CZ-5.0/LFT1, LP2950CZ-5.0/LFT3, LP2950CZ-5.0/LFT7): These parts share the LP2950 base product designation and meet all critical parameters. Dropout voltage is specified at 0.6V @ 100mA, which is within acceptable tolerance for most applications. All variants are active products with ROHS3 compliance. Inventory availability is substantial across multiple part numbers.

STMicroelectronics L78L05 Series (L78L05ABZ-AP, L78L05ABZ-TR): These regulators meet all functional requirements with identical output voltage, current rating, and operating temperature range. Quiescent current is specified at 5.5 mA, which differs from the primary part's 120 µA specification. Both parts are active products with ROHS3 compliance. L78L05ABZ-TR offers the highest inventory availability at 23,389 pieces.

Frequently Asked Questions (FAQ)

Q: Can I substitute an L78L05ABZ series part for the LP2950ACZ-5.0RAG?

A: Yes. Both part families deliver 5V fixed output at 100mA in TO-92-3 packages with identical operating temperature ranges and input voltage ratings. The primary difference is quiescent current: L78L05ABZ parts draw 5.5 mA compared to the LP2950's 120 µA. This difference is significant in low-power or battery-powered applications where standby current consumption is critical.

Q: What is the difference between LP2950CZ-5.0RAG and LP2950CZ-5.0RPG?

A: Both are onsemi parametric equivalents with identical electrical specifications. The difference lies in packaging designation and tape configuration. Both are suitable direct substitutes for the LP2950ACZ-5.0RAG.

Q: Are all substitute parts in the same physical package?

A: Yes. All listed substitute parts use the TO-92-3 (TO-226-3) through-hole package with formed leads. Physical dimensions and pin configurations are compatible for direct board-level substitution.

Q: Does dropout voltage variation affect substitution suitability?

A: Dropout voltage differences (0.45V for onsemi LP2950 versus 0.6V for Texas Instruments LP2950 variants) are within typical design margins for 5V regulator applications. Selection depends on specific circuit requirements. Applications with marginal input voltage headroom should prioritize lower dropout specifications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting environmental and regulatory requirements equivalent to the primary part.

Q: Which substitute offers the best inventory availability?

A: L78L05ABZ-TR from STMicroelectronics provides the highest inventory at 23,389 pieces, followed by LP2950-50LPRE3 from Texas Instruments at 37,200 pieces.

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