MIC4576-5.0WU-TR Equivalent & Substitute Parts

Part Overview

The MIC4576-5.0WU-TR is a buck switching regulator IC manufactured by Microchip Technology, delivering a fixed 5V output at 3A. This surface-mount component operates across a 4V to 36V input range with a 200kHz switching frequency and is housed in a TO-263-6 D2PAK package. The part is active and ROHS3 compliant, making it suitable for industrial and commercial power management applications. Substitute parts are identified to address inventory availability, extended operating temperature ranges, or alternative packaging options while maintaining electrical and mechanical compatibility.

Substiute Parts

MIC4576-5.0WU-TR

Microchip TechnologyIn Stock: 1254MIC4576-5.0WU-TR Datasheet

Current PartRFQ

AP1501-50K5G-13

Diodes IncorporatedIn Stock: 24059AP1501-50K5G-13 Datasheet

MFR RecommendedRFQ

LM2575S-5.0/NOPB

Texas InstrumentsIn Stock: 2230LM2575S-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2575SX-5.0/NOPB

Texas InstrumentsIn Stock: 15882LM2575SX-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2591HVS-5.0/NOPB

Texas InstrumentsIn Stock: 5000161LM2591HVS-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2591HVSX-5.0/NOPB

Texas InstrumentsIn Stock: 2836LM2591HVSX-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2595S-5.0/NOPB

Texas InstrumentsIn Stock: 2564LM2595S-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2595SX-5.0/NOPB

Texas InstrumentsIn Stock: 96209LM2595SX-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2596S-5.0/NOPB

Texas InstrumentsIn Stock: 9015LM2596S-5.0/NOPB Datasheet

MFR RecommendedRFQ

LM2596SX-5.0/NOPB

Texas InstrumentsIn Stock: 43147LM2596SX-5.0/NOPB Datasheet

MFR RecommendedRFQ

TL2575-05IKTTR

Texas InstrumentsIn Stock: 21640TL2575-05IKTTR Datasheet

MFR RecommendedRFQ

TL2575-05IKTTRG3

Texas InstrumentsIn Stock: 5442TL2575-05IKTTRG3 Datasheet

MFR RecommendedRFQ

TL2575HV-05IKTTR

Texas InstrumentsIn Stock: 1320TL2575HV-05IKTTR Datasheet

MFR RecommendedRFQ

TL2575HV-05QKTTRQ1

Texas InstrumentsIn Stock: 2688TL2575HV-05QKTTRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are grouped based on the following critical parameters that determine functional equivalence:

Primary Compatibility Criteria:

• Output voltage: 5V fixed
• Output topology: Buck (step-down)
• Package type: TO-263-6 D2PAK (5 Leads + Tab)
• Output configuration: Positive
• Number of outputs: 1
• Synchronous rectifier: No
• RoHS compliance: ROHS3

Secondary Selection Factors:

• Output current rating (1A or 3A variants)
• Input voltage range (minimum 4V, maximum 36V to 60V)
• Operating temperature range (-40°C to 85°C or -40°C to 125°C)
• Switching frequency (52kHz, 150kHz, or 200kHz)

Substitutes are divided into two categories: full-current equivalents (3A output) and reduced-current alternatives (1A output). Full-current substitutes maintain the 3A rating and are direct replacements. Reduced-current substitutes operate at 1A and are suitable only for applications requiring lower output current.

Parameter Comparison

Engineering Selection Recommendations

Full-Current Equivalents (3A Output):

The AP1501-50K5G-13 from Diodes Incorporated and LM2596S-5.0/NOPB or LM2596SX-5.0/NOPB from Texas Instruments are direct 3A substitutes. The AP1501 operates at a reduced minimum temperature (-20°C vs. -40°C) and is suitable for commercial-grade applications. The LM2596 variants extend the operating temperature to 125°C and support input voltages up to 40V, providing enhanced thermal performance for industrial environments. Both maintain ROHS3 compliance and the required TO-263-6 package.

Reduced-Current Alternatives (1A Output):

The LM2575, LM2591HV, and LM2595 series from Texas Instruments are 1A-rated substitutes. These are applicable only when the application load does not exceed 1A. The LM2591HV series supports extended input voltage ranges up to 60V, making it suitable for high-voltage input applications. All 1A variants are ROHS3 compliant and available in both tube and cut-tape packaging options.

Compliance and Certification:

All substitute parts maintain ROHS3 compliance and MSL-3 moisture sensitivity ratings. The LM2596SX-5.0/NOPB carries REACH Affected status, while all other substitutes are REACH Unaffected. Selection should account for supply chain requirements and regulatory obligations specific to the end application.

Frequently Asked Questions (FAQ)

Q: Can I use a 1A-rated substitute in place of the MIC4576-5.0WU-TR?

A: Only if your application requires a maximum output current of 1A or less. The MIC4576 is rated for 3A continuous output. Using a 1A-rated part in a 3A application will result in thermal stress and potential device failure.

Q: What is the difference between tube and cut-tape packaging?

A: Tube packaging is supplied in plastic tubes for manual handling and lower-volume applications. Cut-tape and Digi-Reel packaging are supplied on tape for automated pick-and-place assembly. Both contain identical components; the difference is in handling and assembly method.

Q: Are the LM2596 variants pin-compatible with the MIC4576?

A: Yes. All substitute parts listed use the TO-263-6 D2PAK package with identical pinout and lead configuration, ensuring direct PCB compatibility without layout modifications.

Q: Why do some substitutes have different input voltage ranges?

A: Input voltage range variations reflect design differences between manufacturers. The MIC4576 supports 4V to 36V, while some substitutes extend to 40V or 60V maximum. Verify that your application's input voltage falls within the substitute's specified range.

Q: Does switching frequency affect circuit performance?

A: Switching frequency influences output ripple, EMI characteristics, and component selection for filtering. The MIC4576 operates at 200kHz, while most substitutes operate at 52kHz or 150kHz. Lower switching frequencies may require larger filter components. Verify filter design compatibility before substitution.

Q: Can I substitute parts with different operating temperature ranges?

A: Yes, provided the substitute's temperature range encompasses your application's operating environment. The MIC4576 operates to 85°C; substitutes rated to 125°C provide additional thermal margin and are suitable for high-temperature environments.