MIC2950-05BZ Equivalent & Substitute Parts

Part Overview

The MIC2950-05BZ is a linear voltage regulator IC from Microchip Technology, classified as a positive adjustable (fixed) output power management component in TO-92-3 packaging. This device delivers 150mA output current with a maximum input voltage of 30V and operates across the industrial temperature range of -40°C to 125°C. The product is discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	MIC2950-05BZ
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Package / Case	TO-92-3 (TO-226-3)
Output Configuration	Positive
Output Type	Adjustable (Fixed)
Voltage - Input (Max)	30V
Voltage - Output (Min/Fixed)	1.24V (5V)
Voltage - Output (Max)	29V
Voltage Dropout (Max)	0.6V @ 150mA
Current - Output	150mA
Current - Quiescent (Iq)	300 µA
Operating Temperature	-40°C ~ 125°C
Mounting Type	Through Hole
Protection Features	Over Current, Over Temperature, Reverse Polarity
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the MIC2950-05BZ is determined by the following critical parameters:

Package Compatibility: TO-92-3 (TO-226-3) through-hole mounting
Output Configuration: Positive polarity
Voltage Specifications: Input maximum 30V, output fixed at 5V
Current Capacity: Minimum 100mA output (original part rated 150mA)
Dropout Voltage: Maximum 0.6V at rated current
Operating Temperature Range: -40°C to 125°C
Protection Features: Over current and over temperature protection

The substitute parts listed below meet these core electrical and mechanical parameters. All substitutes are available in TO-92-3 packaging and maintain compatibility with the original circuit topology. Output current capacity in substitutes ranges from 100mA to 150mA, with the 100mA variants suitable for applications not requiring the full 150mA specification of the original part.

Parameter Comparison

Parameter	MIC2950-05BZ	LP2950ACZ-5.0/LFT7	LP2950ACZ-5.0/NOPB	LP2950ACZ-5.0G	LP2950CZ-5.0/LFT1	LP2950CZ-5.0/LFT3	LP2950CZ-5.0/LFT7	LP2950CZ-5.0/NOPB	LP2950CZ-5.0G	TL750L05CLP
Manufacturer	Microchip	Texas Instruments	Texas Instruments	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	onsemi	Texas Instruments
Package / Case	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3	TO-92-3
Output Configuration	Positive	Positive	Positive	Positive	Positive	Positive	Positive	Positive	Positive	Positive
Output Type	Adjustable (Fixed)	Fixed	Fixed	Fixed	Fixed	Fixed	Fixed	Fixed	Fixed	Fixed
Voltage - Input (Max)	30V	30V	30V	30V	30V	30V	30V	30V	30V	26V
Voltage - Output (Fixed)	5V	5V	5V	5V	5V	5V	5V	5V	5V	5V
Voltage Dropout (Max)	0.6V @ 150mA	0.6V @ 100mA	0.6V @ 100mA	0.45V @ 100mA	0.6V @ 100mA	0.6V @ 100mA	0.6V @ 100mA	0.6V @ 100mA	0.45V @ 100mA	0.6V @ 150mA
Current - Output	150mA	100mA	100mA	100mA	100mA	100mA	100mA	100mA	100mA	150mA
Current - Quiescent (Iq)	300 µA	120 µA	120 µA	120 µA	120 µA	120 µA	120 µA	120 µA	120 µA	2 mA
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	0°C ~ 125°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature	Over Current, Over Temperature	Over Current, Over Temperature, Over Voltage, Reverse Polarity
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Vendor Undefined	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed are in active production status, ensuring long-term availability and supply chain stability. The LP2950 series variants from Texas Instruments and onsemi are ROHS3 compliant, meeting modern environmental and regulatory requirements that the discontinued MIC2950-05BZ does not satisfy.

For applications requiring the full 150mA output current specification of the original part, the TL750L05CLP is the direct functional equivalent, offering 150mA capacity with identical dropout voltage performance at rated current. This device also provides enhanced protection features including over-voltage and reverse polarity protection.

For applications with output current requirements of 100mA or less, the LP2950 series variants provide superior performance characteristics. The onsemi-manufactured LP2950ACZ-5.0G and LP2950CZ-5.0G variants offer reduced dropout voltage of 0.45V at 100mA compared to 0.6V in Texas Instruments variants, resulting in improved efficiency in low-voltage input scenarios. All LP2950 variants feature lower quiescent current (120 µA) compared to the original part (300 µA), reducing standby power consumption.

Packaging variants (Cut Tape, Bulk, Tube) do not affect electrical compatibility and are selected based on procurement and assembly requirements. The choice between LP2950ACZ and LP2950CZ designations reflects internal circuit topology differences that do not impact functional substitution for fixed 5V output applications.

Frequently Asked Questions (FAQ)

Q: Can the LP2950 series (100mA) directly replace the MIC2950-05BZ (150mA) in all applications?

A: The LP2950 series is suitable for applications drawing 100mA or less. If your circuit requires the full 150mA output capacity, use the TL750L05CLP instead. Verify your actual load current before selecting a 100mA substitute.

Q: What is the difference between LP2950ACZ and LP2950CZ variants?

A: Both variants are functionally equivalent for 5V fixed output applications. The designations reflect internal circuit architecture but produce identical electrical performance. Selection is based on availability and packaging preference.

Q: Are the different packaging options (Cut Tape, Bulk, Tube) electrically equivalent?

A: Yes. Packaging options (LP2950CZ-5.0/LFT1, LP2950CZ-5.0/LFT3, LP2950CZ-5.0/LFT7, LP2950CZ-5.0/NOPB) represent the same component in different supply formats. Choose based on your procurement volume and assembly process requirements.

Q: Why does the TL750L05CLP have a lower maximum input voltage (26V vs 30V)?

A: The TL750L05CLP is rated for 26V maximum input, while the original MIC2950-05BZ and LP2950 variants support 30V. If your circuit operates above 26V input, use an LP2950 variant or verify that your actual input voltage remains within the TL750L05CLP specification.

Q: What is the significance of the lower quiescent current in LP2950 variants?

A: The LP2950 series draws 120 µA quiescent current compared to 300 µA in the MIC2950-05BZ. This 60% reduction in standby current consumption is beneficial for battery-powered or low-power standby applications, resulting in extended operating life.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed are ROHS3 compliant except LP2950CZ-5.0/NOPB, which has vendor-undefined RoHS status. The original MIC2950-05BZ is RoHS non-compliant. Verify RoHS compliance requirements for your application before final selection.

Q: Can I use the onsemi LP2950 variants interchangeably with Texas Instruments variants?

A: Yes. Both manufacturers' LP2950 variants meet the same electrical specifications for 5V fixed output in TO-92-3 packaging. The onsemi variants offer slightly lower dropout voltage (0.45V vs 0.6V at 100mA), which may provide marginal efficiency benefits in specific applications.

Q: What protection features should I prioritize when selecting a substitute?

A: All substitutes include over-current and over-temperature protection. The TL750L05CLP adds over-voltage and reverse-polarity protection. The original MIC2950-05BZ includes reverse-polarity protection, which is absent in most LP2950 variants. If reverse-polarity protection is critical, select TL750L05CLP or verify your circuit design includes external protection.

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