MIC2954-02BT Equivalent & Substitute Parts

Part Overview

The MIC2954-02BT is a linear voltage regulator IC from Microchip Technology designed for positive fixed 5V output at 250mA in a TO-220-3 package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The MIC2954-02BT provides essential power management functionality with integrated protection features including load dump, over current, over temperature, reverse polarity, and UV power-on reset protection.

Substiute Parts

MIC2954-02BT

Microchip TechnologyIn Stock: 2572MIC2954-02BT Datasheet

Current PartRFQ

MIC2954-02WT

Microchip TechnologyIn Stock: 1366MIC2954-02WT Datasheet

DirectRFQ

LM2930T-5.0/NOPB

Texas InstrumentsIn Stock: 5378LM2930T-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2940T-5.0/LF08

Texas InstrumentsIn Stock: 3719LM2940T-5.0/LF08 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MIC2954-02BT is determined by the following critical parameters: output voltage (5V fixed), package type (TO-220-3), mounting configuration (through hole), and protection features. The substitute parts are grouped into two categories:

Direct Equivalent: MIC2954-02WT maintains identical electrical specifications and is the active production variant of the same base product (MIC2954). This part provides a direct replacement path with matching output current (250mA), input voltage rating (30V), and dropout voltage (0.6V @ 250mA).

Functional Alternatives: LM2930T-5.0/NOPB and LM2940T-5.0/LF08 are Texas Instruments regulators that share the same output voltage (5V), package (TO-220-3), and mounting type (through hole). These parts differ in output current capability and specific protection feature sets, requiring design verification based on application current requirements.

Parameter Comparison

Engineering Selection Recommendations

MIC2954-02WT is the preferred substitute for direct replacement applications. This part is in active production status with ROHS3 compliance, maintaining identical electrical specifications and package configuration as the MIC2954-02BT. The MIC2954-02WT provides continuity for existing designs without circuit modification.

LM2930T-5.0/NOPB is suitable for applications where output current requirements do not exceed 150mA. This part is in active production with ROHS3 compliance but operates at a reduced maximum temperature of 85°C and has higher quiescent current (7 mA). The input voltage maximum is also reduced to 26V.

LM2940T-5.0/LF08 is applicable for designs requiring higher output current (1A) with the same 5V output. This part maintains the full operating temperature range (-40°C to 125°C) and is ROHS3 compliant. However, the dropout voltage is higher (1V @ 1A), and the mounting configuration uses surface mount formed leads rather than standard through-hole.

All substitute parts maintain the TO-220-3 package footprint and 5V fixed output voltage. Selection should be based on specific application requirements for output current, input voltage range, operating temperature, and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can MIC2954-02WT directly replace MIC2954-02BT without circuit changes?

A: Yes. The MIC2954-02WT is the active production equivalent with identical electrical specifications, output current (250mA), input voltage rating (30V), dropout voltage (0.6V @ 250mA), and TO-220-3 package configuration. No circuit modifications are required.

Q: What are the key differences between MIC2954-02BT and LM2930T-5.0/NOPB?

A: The LM2930T-5.0/NOPB has reduced output current capability (150mA versus 250mA), lower maximum input voltage (26V versus 30V), lower maximum operating temperature (85°C versus 125°C), and higher quiescent current (7 mA versus 300 µA). This part is suitable only for applications with current requirements below 150mA.

Q: When should LM2940T-5.0/LF08 be selected?

A: The LM2940T-5.0/LF08 is selected when applications require higher output current (1A) than the MIC2954-02BT (250mA). This part maintains the full operating temperature range and is ROHS3 compliant. The higher dropout voltage (1V @ 1A) must be verified against application input voltage margins.

Q: Are all substitute parts ROHS3 compliant?

A: MIC2954-02WT, LM2930T-5.0/NOPB, and LM2940T-5.0/LF08 are all ROHS3 compliant. The original MIC2954-02BT is RoHS non-compliant, making the substitute parts necessary for new designs subject to RoHS requirements.

Q: What is the package difference between MIC2954-02WT and LM2940T-5.0/LF08?

A: Both use TO-220-3 packages. MIC2954-02WT is standard through-hole mounting. LM2940T-5.0/LF08 uses TO-220-3 with formed leads for surface mount applications. PCB layout and mounting method must be verified for compatibility.

Q: Can LM2930T-5.0/NOPB be used in applications designed for 250mA output?

A: No. The LM2930T-5.0/NOPB maximum output current is 150mA. Using this part in applications requiring 250mA will result in regulator shutdown or thermal stress. Output current requirements must be verified before substitution.