MIC4575-5.0BU TR Equivalent & Substitute Parts

Part Overview

The MIC4575-5.0BU TR is a buck and buck-boost switching regulator IC from Microchip Technology, delivering fixed 5V output at 1.7A in a TO-263-6 D2PAK package. This part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The device operates across a 4V to 24V input range with 200kHz switching frequency and is rated for -40°C to 85°C operating temperature. RoHS non-compliance and non-REACH affected status reflect its legacy product classification.

Substiute Parts

MIC4575-5.0BU TR

Microchip TechnologyIn Stock: 1174MIC4575-5.0BU TR Datasheet

Current PartRFQ

MIC4575-5.0WU-TR

Microchip TechnologyIn Stock: 2711MIC4575-5.0WU-TR Datasheet

DirectRFQ

AP1501-50K5G-13

Diodes IncorporatedIn Stock: 24059AP1501-50K5G-13 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

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

Substitution eligibility is determined by the following criteria:

Primary Compatibility Requirements:

• Fixed 5V output voltage
• TO-263-6 D2PAK package (5 Leads + Tab)
• Surface mount technology
• Positive output configuration
• Single output

Secondary Compatibility Factors:

• Input voltage range must encompass or exceed 4V minimum
• Output current capability of 1.7A or greater
• Operating temperature range of -40°C minimum
• Switching frequency (200kHz reference, but not a strict requirement for functional equivalence)

Substitution Categories:

1. Direct Equivalent (Same Manufacturer): MIC4575-5.0WU-TR maintains identical electrical specifications and package, with active product status and RoHS3 compliance.

2. Functional Equivalents (Higher Current Capability): AP1501-50K5G-13 provides 3A output current, exceeding the 1.7A requirement, with wider input range (4.5V to 40V) and active status.

3. Functional Equivalents (Texas Instruments Buck Regulators): LM2591HVS-5.0/NOPB, LM2591HVSX-5.0/NOPB, TL2575-05IKTTR, TL2575-05IKTTRG3, TL2575HV-05IKTTR, and TL2575HV-05QKTTRQ1 all deliver 5V fixed output in TO-263-6 packaging with 1A or greater output current and extended input voltage ranges.

Parameter Comparison

Engineering Selection Recommendations

Preferred Direct Replacement: MIC4575-5.0WU-TR is the optimal substitute, offering identical electrical and mechanical specifications to the obsolete MIC4575-5.0BU TR while maintaining active product status and RoHS3 compliance. This part requires no design modifications and provides the same 1.7A output current, 200kHz switching frequency, and 4V to 24V input range.

Alternative Selections Based on Application Requirements:

For designs requiring higher output current capacity, AP1501-50K5G-13 from Diodes Incorporated delivers 3A output current with extended input voltage range (4.5V to 40V). This part is suitable for applications where the 1.7A specification represents a design margin rather than a hard requirement.

Texas Instruments buck regulators (LM2591 and TL2575 series) provide active product status and extended operating temperature ranges (-40°C to 125°C). These parts are suitable for applications requiring higher input voltage tolerance (up to 60V for HV variants) or extended temperature performance. Output current is limited to 1A, making these suitable only for designs where 1.7A output is not required.

All substitute parts maintain RoHS3 compliance and REACH unaffected status, supporting modern supply chain and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can MIC4575-5.0WU-TR directly replace MIC4575-5.0BU TR without PCB modifications?

A: Yes. MIC4575-5.0WU-TR is electrically and mechanically identical, with the same pin configuration, output specifications, and TO-263-6 package. No PCB layout changes are required.

Q: What is the difference between the Microchip MIC4575-5.0WU-TR and Texas Instruments TL2575HV-05QKTTRQ1?

A: Both deliver 5V fixed output in TO-263-6 packaging. Key differences include output current (1.7A vs. 1A), input voltage range (4V-24V vs. 4.75V-60V), switching frequency (200kHz vs. 52kHz), and operating temperature (85°C max vs. 125°C max). The TL2575HV variant includes automotive qualification (AEC-Q100).

Q: Is AP1501-50K5G-13 suitable for applications designed for 1.7A output?

A: Yes. AP1501-50K5G-13 provides 3A output current, exceeding the 1.7A requirement. The higher current capability does not create compatibility issues in applications designed for lower current. Input voltage range extends to 40V, providing broader application support.

Q: Why do some substitutes have lower output current (1A) than the original part (1.7A)?

A: Texas Instruments buck regulators in the LM2591 and TL2575 series are designed for different application segments. These parts are suitable only for applications where 1A output current is sufficient. For designs requiring the full 1.7A specification, MIC4575-5.0WU-TR or AP1501-50K5G-13 are appropriate selections.

Q: What is the significance of the "HV" designation in TL2575HV part numbers?

A: The HV designation indicates high-voltage input capability, extending the maximum input voltage to 60V compared to 40V for standard TL2575 variants. This provides flexibility for applications with higher input voltage sources.

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

A: All listed substitutes use TO-263-6 D2PAK (5 Leads + Tab) surface mount packaging. Packaging variants (Cut Tape, Tape & Reel, Tube) differ by supplier and distribution channel but do not affect electrical or mechanical compatibility.