MIC29301-5.0BU Equivalent & Substitute Parts

Part Overview

The MIC29301-5.0BU is a linear voltage regulator IC from Microchip Technology designed to deliver a fixed 5V output at 3A in a TO-263-5 surface mount package. This part is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and production continuity. The MIC29301-5.0BU provides positive fixed output regulation with integrated protection features including over-current, over-temperature, reverse polarity, and transient voltage protection across an operating temperature range of -40°C to 125°C.

Substiute Parts

MIC29301-5.0BU

Microchip TechnologyIn Stock: 3382MIC29301-5.0BU Datasheet

Current PartRFQ

MIC29301-5.0WU

Microchip TechnologyIn Stock: 12495MIC29301-5.0WU Datasheet

DirectRFQ

LP3853ES-5.0/NOPB

Texas InstrumentsIn Stock: 2308LP3853ES-5.0/NOPB Datasheet

MFR RecommendedRFQ

LP3853ESX-5.0/NOPB

Texas InstrumentsIn Stock: 2012LP3853ESX-5.0/NOPB Datasheet

MFR RecommendedRFQ

SPX29301T5-L-5-0/TR

MaxLinear, Inc.In Stock: 2223SPX29301T5-L-5-0/TR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MIC29301-5.0BU is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Fixed output voltage of 5V
• Output current capability of 3A minimum
• Dropout voltage of 0.6V @ 3A or lower
• Operating temperature range of -40°C to 125°C
• Enable control feature
• Surface mount package in TO-263-5 configuration

Mechanical Compatibility:

• Package type: TO-263-5 (D2PAK with 5 Leads + Tab)
• Pin configuration must match TO-263-5 standard

Compliance Considerations:

• RoHS3 compliance preferred for new designs
• MSL rating of 3 (168 Hours) maintained across substitutes

The substitute parts identified maintain electrical equivalence in output voltage, output current, dropout voltage, and thermal operating range. All substitutes are housed in mechanically compatible TO-263-5 packages and feature equivalent protection and control functionality.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: MIC29301-5.0WU

The MIC29301-5.0WU is the direct Microchip equivalent to the obsolete MIC29301-5.0BU. This part maintains identical electrical specifications including 5V fixed output, 3A output current, 0.6V dropout voltage at 3A, and 26V maximum input voltage. The MIC29301-5.0WU is active in production and ROHS3 compliant, making it the preferred choice for designs requiring minimal qualification effort. Packaging is available in tube format with equivalent TO-263-5 mechanical compatibility.

Secondary Substitutes: LP3853ES-5.0/NOPB and LP3853ESX-5.0/NOPB

The Texas Instruments LP3853 series provides electrical equivalence in output voltage, output current, and dropout voltage specifications. Both LP3853ES-5.0/NOPB (tube packaging) and LP3853ESX-5.0/NOPB (tape & reel packaging) are active products with ROHS3 compliance. These parts feature a reduced maximum input voltage of 7V compared to the original 26V specification. Selection of these parts requires verification that the input voltage in the target application does not exceed 7V. Both parts include quiescent current specification (4 mA) and PSRR data (73dB to 57dB at 120Hz) not provided for the original part.

Tertiary Substitute: SPX29301T5-L-5-0/TR

The MaxLinear SPX29301T5-L-5-0/TR maintains 5V output, 3A output current, and equivalent operating temperature range. This part features a maximum input voltage of 16V and dropout voltage of 0.8V @ 3A. The SPX29301T5-L-5-0/TR is active in production with RoHS compliance and is supplied in tape & reel packaging. This part is suitable for applications where input voltage does not exceed 16V and the slightly higher dropout voltage is acceptable.

Compliance Consideration:

All active substitute parts are RoHS compliant, addressing the non-compliance status of the obsolete MIC29301-5.0BU. For new designs and production continuity, selection of any active substitute ensures compliance with current environmental regulations.

Frequently Asked Questions (FAQ)

Q: Can the MIC29301-5.0WU be used as a direct replacement for the MIC29301-5.0BU?

A: Yes. The MIC29301-5.0WU is electrically and mechanically equivalent to the MIC29301-5.0BU. Both parts deliver 5V at 3A with 0.6V dropout voltage, support 26V maximum input voltage, and use identical TO-263-5 packaging. The primary difference is product status: MIC29301-5.0WU is active while MIC29301-5.0BU is obsolete.

Q: What is the key limitation of the LP3853 series substitutes?

A: The LP3853ES-5.0/NOPB and LP3853ESX-5.0/NOPB have a maximum input voltage rating of 7V, compared to 26V for the original MIC29301-5.0BU. These parts are suitable only for applications where the input voltage does not exceed 7V. Verify input voltage requirements before selecting these substitutes.

Q: Are all substitute parts available in the same packaging as the original?

A: All substitute parts use the TO-263-5 package (D2PAK with 5 Leads + Tab), which is mechanically compatible with the original MIC29301-5.0BU. Packaging format differs: MIC29301-5.0WU is available in tube, LP3853ES-5.0/NOPB in tube, LP3853ESX-5.0/NOPB in tape & reel, and SPX29301T5-L-5-0/TR in tape & reel. Select packaging format based on assembly requirements.

Q: Do all substitutes meet RoHS compliance requirements?

A: Yes. All active substitute parts are RoHS compliant. The original MIC29301-5.0BU is RoHS non-compliant. For new designs, any of the identified substitutes addresses compliance requirements.

Q: What is the difference between LP3853ES-5.0/NOPB and LP3853ESX-5.0/NOPB?

A: Both parts are electrically identical with 5V output, 3A current, and 0.6V dropout voltage. The primary difference is packaging format: LP3853ES-5.0/NOPB is supplied in tube, while LP3853ESX-5.0/NOPB is supplied in tape & reel. Select based on assembly process requirements.

Q: Can the SPX29301T5-L-5-0/TR be used if input voltage exceeds 16V?

A: No. The SPX29301T5-L-5-0/TR has a maximum input voltage rating of 16V. Applications requiring input voltages above 16V must use MIC29301-5.0WU, which supports 26V maximum input voltage.

Q: What is the dropout voltage difference between substitutes?

A: MIC29301-5.0BU, MIC29301-5.0WU, LP3853ES-5.0/NOPB, and LP3853ESX-5.0/NOPB all specify 0.6V dropout voltage at 3A. The SPX29301T5-L-5-0/TR specifies 0.8V dropout voltage at 3A. For applications with tight input-to-output voltage margins, verify that the higher dropout voltage of the SPX29301 does not exceed system requirements.