LP2950-02BZ Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LP2950-02BZ is a linear voltage regulator IC manufactured by Microchip Technology, designed to provide a fixed 5V positive output at 100mA in a TO-92-3 through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The LP2950-02BZ operates across an input voltage range up to 30V with a maximum dropout voltage of 0.6V at 100mA and quiescent current of 150µA, suitable for low-power applications requiring stable 5V regulation.

Key Parameters

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

Substitute Part Grouping Explanation

Substitute parts for the LP2950-02BZ are qualified based on the following critical parameters:

Fixed 5V output voltage
100mA output current capability
Maximum input voltage of 30V
TO-92-3 through-hole package compatibility
Operating temperature range of -40°C to 125°C
Positive output configuration with single regulator

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in quiescent current, dropout voltage, and protection features are noted but do not disqualify substitution when the primary functional parameters align.

Parameter Comparison

Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage @ 100mA	Quiescent Current	Product Status	RoHS Compliance
LP2950-02BZ	Microchip Technology	5V	100mA	30V	0.6V	150µA	Obsolete	Non-compliant
L78L05ABZ	STMicroelectronics	5V	100mA	30V	—	5.5mA	Active	ROHS3 Compliant
LP2950ACZ-5.0/LFT7	Texas Instruments	5V	100mA	30V	0.6V	120µA	Active	ROHS3 Compliant
LP2950ACZ-5.0/NOPB	Texas Instruments	5V	100mA	30V	0.6V	120µA	Active	ROHS3 Compliant
LP2950ACZ-5.0G	onsemi	5V	100mA	30V	0.45V	120µA	Active	ROHS3 Compliant
LP2950CZ-5.0/LFT1	Texas Instruments	5V	100mA	30V	0.6V	120µA	Active	ROHS3 Compliant
LP2950CZ-5.0/LFT3	Texas Instruments	5V	100mA	30V	0.6V	120µA	Active	ROHS3 Compliant
LP2950CZ-5.0/LFT7	Texas Instruments	5V	100mA	30V	0.6V	120µA	Active	ROHS3 Compliant
LP2950CZ-5.0/NOPB	Texas Instruments	5V	100mA	30V	0.6V	120µA	Active	Not specified
LP2950CZ-5.0G	onsemi	5V	100mA	30V	0.45V	120µA	Active	ROHS3 Compliant
MC78L05ABPG	onsemi	5V	100mA	30V	—	6mA	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are electrically and mechanically compatible with the LP2950-02BZ based on matching output voltage, current rating, input voltage range, and TO-92-3 package specification.

Primary Selection Criteria:

Active Product Status: All substitute parts listed carry active product status, ensuring ongoing availability and manufacturing support. The original LP2950-02BZ is obsolete.
RoHS Compliance: Most substitute parts are ROHS3 compliant. For applications requiring RoHS compliance, select from LP2950ACZ-5.0/LFT7, LP2950ACZ-5.0/NOPB, LP2950ACZ-5.0G, LP2950CZ-5.0/LFT1, LP2950CZ-5.0/LFT3, LP2950CZ-5.0/LFT7, LP2950CZ-5.0G, L78L05ABZ, or MC78L05ABPG.
Packaging Format: Cut Tape (CT) variants (LP2950CZ-5.0/LFT series) are suitable for automated assembly. Bulk packaging variants are appropriate for manual assembly or reel-based operations.
Quiescent Current Consideration: LP2950 series variants (120µA quiescent current) offer lower power consumption compared to L78L05ABZ (5.5mA) and MC78L05ABPG (6mA), making them preferable for battery-powered or low-power applications.
Dropout Voltage: onsemi LP2950ACZ-5.0G and LP2950CZ-5.0G variants feature 0.45V dropout voltage, compared to 0.6V for other LP2950 variants, providing improved performance in low-input-voltage applications.

Frequently Asked Questions (FAQ)

Q: Can I directly replace LP2950-02BZ with any of the listed substitute parts?

A: Yes. All listed parts maintain the same 5V fixed output, 100mA current rating, 30V maximum input voltage, and TO-92-3 package. Pin configuration and functional behavior are compatible for direct substitution in existing designs.

Q: What is the difference between LP2950 and L78L05 series regulators?

A: Both provide 5V 100mA regulation in TO-92-3 packages. The LP2950 series features lower quiescent current (120µA) compared to L78L05ABZ (5.5mA), making LP2950 variants more suitable for low-power applications. L78L05ABZ offers higher PSRR (49dB at 120Hz) and may be preferred in noise-sensitive applications.

Q: Does packaging format affect electrical performance?

A: No. Cut Tape (CT), Bulk, and other packaging formats contain identical die and electrical specifications. Packaging format selection depends on assembly process requirements and volume handling.

Q: Are all substitute parts RoHS compliant?

A: Most substitute parts are ROHS3 compliant. LP2950CZ-5.0/NOPB compliance status is not specified in available data. Verify RoHS status with the supplier for applications requiring regulatory compliance documentation.

Q: Which substitute part offers the best performance for battery-powered applications?

A: LP2950ACZ-5.0G and LP2950CZ-5.0G from onsemi are recommended. These variants combine low quiescent current (120µA) with reduced dropout voltage (0.45V), minimizing power loss and extending battery runtime.

Q: Can I use these parts interchangeably in production?

A: Yes, within the same base series. All LP2950 variants are interchangeable. L78L05ABZ and MC78L05ABPG are functionally equivalent but from different manufacturers. Verify with your design validation process before switching between different base part numbers in production.

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