LP2950-03YZ Equivalent & Substitute Parts

Part Overview

The LP2950-03YZ is a linear voltage regulator IC from Microchip Technology, delivering a fixed 5V output at 100mA in a TO-92-3 package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and production continuity. The LP2950 series operates across the industrial temperature range (-40°C to 125°C) and is suitable for applications requiring low-dropout regulation with minimal quiescent current draw.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	100mA
Input Voltage (Max)	30V
Dropout Voltage	0.6V @ 100mA
Quiescent Current	150 µA
Operating Temperature	-40°C to 125°C
Package Type	TO-92-3 (TO-226-3)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the LP2950-03YZ is determined by strict equivalence across the following electrical and mechanical parameters:

Fixed 5V output voltage
100mA output current capability
Maximum 30V input voltage rating
TO-92-3 through-hole package
Operating temperature range -40°C to 125°C
ROHS3 compliance

Substitute parts must maintain identical output voltage, current rating, and package form factor. Variations in quiescent current, dropout voltage, and protection features are acceptable provided the part remains functionally compatible within the specified electrical envelope.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage	Quiescent Current	Operating Temp	Package	Status
LP2950-03YZ	Microchip Technology	5V	100mA	30V	0.6V @ 100mA	150 µA	-40°C to 125°C	TO-92-3	Obsolete
L78L05ABZ	STMicroelectronics	5V	100mA	30V	—	5.5 mA	-40°C to 125°C	TO-92-3	Active
LP2950ACZ-5.0/LFT7	Texas Instruments	5V	100mA	30V	0.6V @ 100mA	120 µA	-40°C to 125°C	TO-92-3	Active
LP2950ACZ-5.0/NOPB	Texas Instruments	5V	100mA	30V	0.6V @ 100mA	120 µA	-40°C to 125°C	TO-92-3	Active
LP2950ACZ-5.0G	onsemi	5V	100mA	30V	0.45V @ 100mA	120 µA	-40°C to 125°C	TO-92-3	Active
LP2950CZ-5.0/NOPB	Texas Instruments	5V	100mA	30V	0.6V @ 100mA	120 µA	-40°C to 125°C	TO-92-3	Active
LP2950CZ-5.0G	onsemi	5V	100mA	30V	0.45V @ 100mA	120 µA	-40°C to 125°C	TO-92-3	Active
MC78L05ABPG	onsemi	5V	100mA	30V	—	6 mA	-40°C to 125°C	TO-92-3	Active
MC78L05ACPG	onsemi	5V	100mA	30V	—	6 mA	0°C to 125°C	TO-92-3	Active
NCV78L05ABPG	onsemi	5V	100mA	30V	—	6 mA	-40°C to 125°C	TO-92-3	Active
UA78L05ACLPM	Texas Instruments	5V	100mA	20V	1.7V @ 40mA	—	0°C to 125°C	TO-92-3	Last Time Buy

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Temperature Range)

LP2950ACZ-5.0/LFT7 and LP2950ACZ-5.0/NOPB from Texas Instruments are direct functional equivalents with identical dropout voltage specification (0.6V @ 100mA) and lower quiescent current (120 µA). Both are in active production status.

LP2950ACZ-5.0G and LP2950CZ-5.0G from onsemi provide improved dropout performance (0.45V @ 100mA) while maintaining all other electrical specifications. Both are active and ROHS3 compliant.

Secondary Substitutes (Active Status, Alternate Temperature Range)

MC78L05ABPG from onsemi maintains the full -40°C to 125°C temperature range with active status. Quiescent current is higher (6 mA) but remains within acceptable limits for most applications.

NCV78L05ABPG from onsemi is AEC-Q100 qualified for automotive applications, suitable when automotive-grade components are required.

Limited Substitutes (Restricted Input Voltage or End-of-Life Status)

UA78L05ACLPM from Texas Instruments has a reduced maximum input voltage (20V versus 30V) and is classified as Last Time Buy. Use only when input voltage does not exceed 20V.

MC78L05ACPG has a reduced operating temperature minimum (0°C versus -40°C). Use only when minimum operating temperature is 0°C or higher.

Frequently Asked Questions (FAQ)

Q: Can I use LP2950ACZ-5.0G as a direct replacement for LP2950-03YZ?

A: Yes. Both deliver 5V at 100mA in TO-92-3 packages across -40°C to 125°C. The LP2950ACZ-5.0G has superior dropout voltage (0.45V versus 0.6V) and lower quiescent current (120 µA versus 150 µA), making it functionally superior.

Q: What is the difference between LP2950ACZ-5.0/LFT7 and LP2950ACZ-5.0/NOPB?

A: Both are Texas Instruments LP2950 variants with identical electrical specifications. The suffix indicates packaging format: /LFT7 is Cut Tape, /NOPB is Bulk. Electrical performance is equivalent.

Q: Can I use MC78L05ACPG if my application operates from 0°C to 125°C?

A: Yes, provided your minimum operating temperature is 0°C or higher. The MC78L05ACPG is not rated below 0°C, unlike the LP2950-03YZ which operates to -40°C.

Q: Is UA78L05ACLPM suitable for my 30V input application?

A: No. UA78L05ACLPM has a maximum input voltage rating of 20V. Use LP2950 or MC78L05 variants instead, which are rated to 30V.

Q: What is the advantage of NCV78L05ABPG over other substitutes?

A: NCV78L05ABPG is AEC-Q100 qualified for automotive applications. Select this part only if automotive-grade qualification is a design requirement.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitutes are ROHS3 compliant, matching the original LP2950-03YZ specification.

Q: Can I interchange TO-92-3 packages between different manufacturers?

A: Yes. All listed parts use the TO-92-3 (TO-226-3) through-hole package with identical pin configuration and mechanical dimensions, enabling direct board-level substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message