LM330T-5.0 Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The LM330T-5.0 is a linear voltage regulator IC from Texas Instruments designed for positive fixed 5V output applications with 150mA current capacity in a TO-220-3 package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The LM330T-5.0 provides basic voltage regulation with over temperature, reverse polarity, and short circuit protection suitable for legacy system maintenance and component replacement scenarios.

Key Parameters

Parameter	Value
Manufacturer Part Number	LM330T-5.0
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Output Voltage (Fixed)	5V
Output Current	150mA
Input Voltage (Max)	26V
Package / Case	TO-220-3
Mounting Type	Through Hole
Operating Temperature	0°C ~ 70°C
Protection Features	Over Temperature, Reverse Polarity, Short Circuit
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitute parts for the LM330T-5.0 are selected based on the following critical parameters that determine functional compatibility:

Core Substitution Criteria:

Output voltage: 5V fixed (all substitutes maintain this specification)
Package type: TO-220-3 (mechanical and thermal compatibility)
Input voltage rating: 26V maximum (electrical compatibility)
Output configuration: Positive fixed regulator
Mounting type: Through Hole

Substitution Categories:

Direct Equivalent: LM330T-5.0/NOPB maintains identical electrical specifications and packaging, differing only in product status (Active vs. Obsolete) and supplier packaging format.

Higher Current Capacity Substitutes: MIC2920A-5.0WT (400mA), MIC2937A-5.0WT (750mA), MIC2940A-5.0WT (1.25A), MIC29150-5.0WT (1.5A), MIC29300-5.0WT (3A), and MIC29500-5.0WT (5A) provide increased output current while maintaining 5V output, TO-220-3 package, and 26V input rating. These are suitable for applications requiring higher current delivery than the original 150mA specification.

Lower Current Substitute: LM2931AT-5.0G provides 100mA output current with enhanced operating temperature range (-40°C to 125°C) and improved PSRR specification, though with reduced current capacity compared to the original part.

Specialized Current Variants: MIC2954-02WT and MIC2954-03WT offer 250mA output with extended input voltage rating (30V) and additional protection features including Load Dump and UV POR.

Parameter Comparison

Part Number	Manufacturer	Output Current	Input Voltage (Max)	Package	Operating Temp	Product Status	RoHS Status
LM330T-5.0	Texas Instruments	150mA	26V	TO-220-3	0°C ~ 70°C	Obsolete	Non-compliant
LM330T-5.0/NOPB	National Semiconductor	150mA	26V	TO-220-3	0°C ~ 70°C	Active	Not specified
LM2931AT-5.0G	onsemi	100mA	26V	TO-220-3	-40°C ~ 125°C	Active	ROHS3 Compliant
MIC2920A-5.0WT	Microchip Technology	400mA	26V	TO-220-3	-40°C ~ 125°C	Active	ROHS3 Compliant
MIC2937A-5.0WT	Microchip Technology	750mA	26V	TO-220-3	-40°C ~ 125°C	Active	ROHS3 Compliant
MIC2940A-5.0WT	Microchip Technology	1.25A	26V	TO-220-3	-40°C ~ 125°C	Active	ROHS3 Compliant
MIC29150-5.0WT	Microchip Technology	1.5A	26V	TO-220-3	-40°C ~ 125°C	Active	ROHS3 Compliant
MIC29300-5.0WT	Microchip Technology	3A	26V	TO-220-3	-40°C ~ 125°C	Active	ROHS3 Compliant
MIC29500-5.0WT	Microchip Technology	5A	26V	TO-220-3	-40°C ~ 125°C	Active	ROHS3 Compliant
MIC2954-02WT	Microchip Technology	250mA	30V	TO-220-3	-40°C ~ 125°C	Active	ROHS3 Compliant
MIC2954-03WT	Microchip Technology	250mA	30V	TO-220-3	-40°C ~ 125°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): LM330T-5.0/NOPB is the primary direct equivalent, maintaining 150mA output current and identical electrical parameters. This part carries Active product status and is suitable for applications requiring exact specification matching with the original LM330T-5.0.

For RoHS Compliance Requirements: All Microchip Technology MIC series substitutes (MIC2920A-5.0WT through MIC29500-5.0WT, and MIC2954 variants) are ROHS3 compliant, addressing regulatory requirements for new designs and production environments with RoHS mandates. LM2931AT-5.0G from onsemi also provides ROHS3 compliance.

For Extended Operating Temperature Range: Microchip MIC series parts and LM2931AT-5.0G support -40°C to 125°C operating temperature, compared to the original 0°C to 70°C range. This expanded thermal operating window is beneficial for industrial and automotive applications.

For Current Capacity Matching: Select substitute parts based on actual circuit current requirements. MIC2954-02WT and MIC2954-03WT (250mA) provide the closest current rating above the original 150mA specification. Higher current variants (MIC2920A-5.0WT at 400mA and above) are suitable for applications with increased power delivery needs.

For Enhanced Input Voltage Rating: MIC2954-02WT and MIC2954-03WT support 30V maximum input voltage compared to 26V for other parts, providing additional margin in applications with variable input voltage sources.

Frequently Asked Questions (FAQ)

Q: Can LM330T-5.0/NOPB be used as a direct drop-in replacement for LM330T-5.0?

A: Yes. LM330T-5.0/NOPB maintains identical electrical specifications including 150mA output current, 5V fixed output, 26V maximum input voltage, and TO-220-3 package. The primary difference is product status (Active vs. Obsolete) and supplier packaging format (Bulk vs. standard). Pin configuration and thermal characteristics are equivalent.

Q: What is the minimum current capacity substitute for the LM330T-5.0?

A: LM2931AT-5.0G provides 100mA output current, which is below the original 150mA specification. This part is suitable only for applications with current requirements not exceeding 100mA. For applications requiring the full 150mA capacity, LM330T-5.0/NOPB or MIC2954 variants (250mA) are appropriate selections.

Q: Are all substitute parts compatible with the same PCB layout?

A: All listed substitutes use the TO-220-3 package with identical pin configuration and mechanical dimensions. PCB layouts designed for LM330T-5.0 are compatible with all substitute parts without modification. Thermal performance may vary due to different die designs; verify thermal dissipation requirements for high-current variants in thermally constrained applications.

Q: Which substitute offers the best compliance profile for new designs?

A: Microchip Technology MIC series parts (MIC2920A-5.0WT through MIC29500-5.0WT) and MIC2954 variants all provide ROHS3 compliance with Active product status. These parts are recommended for new designs requiring regulatory compliance and long-term supply availability.

Q: Can I use a higher current rated substitute in place of the LM330T-5.0?

A: Yes. Higher current rated substitutes such as MIC2937A-5.0WT (750mA), MIC2940A-5.0WT (1.25A), or MIC29150-5.0WT (1.5A) are electrically compatible and will function correctly in circuits designed for 150mA operation. The higher current rating provides design margin and does not negatively impact circuit performance. Verify that the substitute part's quiescent current and dropout voltage specifications are acceptable for your application.

Q: What is the difference between MIC2954-02WT and MIC2954-03WT?

A: Both parts provide identical electrical specifications including 250mA output current, 5V fixed output, 30V maximum input voltage, and TO-220-3 package. The designation difference (-02 vs. -03) reflects internal design variants or manufacturing process changes. Both are functionally equivalent for substitution purposes.

Q: Is the operating temperature range difference significant for my application?

A: The original LM330T-5.0 operates from 0°C to 70°C, while most substitutes operate from -40°C to 125°C. If your application operates within the 0°C to 70°C range, both original and substitute specifications are acceptable. For applications requiring operation below 0°C or above 70°C, substitute parts with extended temperature ranges are necessary.

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