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AP3003S-5.0TRE1 Equivalent & Substitute Parts
Part Overview
The AP3003S-5.0TRE1 is a buck switching regulator IC manufactured by Diodes Incorporated, delivering fixed 5V output at 3A maximum current in a TO-263-6 (D2PAK) surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The device operates across a 7V to 32V input range with 150kHz switching frequency and is ROHS3 compliant with MSL-3 moisture sensitivity rating.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Part Number | AP3003S-5.0TRE1 |
| Product Status | Obsolete |
| Function | Step-Down (Buck) |
| Output Voltage | 5V Fixed |
| Output Current | 3A |
| Input Voltage Range | 7V to 32V |
| Switching Frequency | 150kHz |
| Package | TO-263-6, D2PAK (5 Leads + Tab) |
| Operating Temperature | -40°C to 85°C (TA) |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 3 (168 Hours) |
Substitute Part Grouping Explanation
Substitution eligibility for the AP3003S-5.0TRE1 is determined by the following critical parameters:
Primary Substitution Criteria:
- Fixed 5V output voltage
- Minimum 3A output current capability
- TO-263-6 package compatibility
- Surface mount technology
- ROHS3 compliance
Secondary Compatibility Factors:
- Input voltage range overlap (minimum 7V support required for direct replacement)
- Switching frequency (150kHz nominal, but 52kHz to 200kHz acceptable for buck topology)
- Operating temperature range (-40°C minimum required)
- Moisture sensitivity level MSL-3 or better
Substitute parts are grouped into two categories: Direct Replacements (matching all primary criteria with active product status) and Functional Equivalents (meeting electrical specifications with minor operational differences).
Parameter Comparison
| Part Number | Manufacturer | Status | Output Current | Input Voltage (Min-Max) | Switching Freq | Temp Range | Package |
|---|---|---|---|---|---|---|---|
| AP3003S-5.0TRE1 | Diodes Inc. | Obsolete | 3A | 7V - 32V | 150kHz | -40°C to 85°C | TO-263-6 |
| AP1501-50K5G-13 | Diodes Inc. | Active | 3A | 4.5V - 40V | 150kHz | -20°C to 85°C | TO-263-6 |
| LM2576-5.0WU | Microchip | Active | 3A | 4V - 40V | 52kHz | -40°C to 125°C | TO-263-6 |
| LM2576-5.0WU-TR | Microchip | Active | 3A | 4V - 40V | 52kHz | -40°C to 125°C | TO-263-6 |
| MIC4576-5.0WU | Microchip | Active | 3A | 4V - 36V | 200kHz | -40°C to 85°C | TO-263-6 |
| MIC4576-5.0WU-TR | Microchip | Active | 3A | 4V - 36V | 200kHz | -40°C to 85°C | TO-263-6 |
| SI-8050SD | Sanken Electric | Active | 3A | 7V - 40V | 60kHz | -30°C to 125°C | TO-263-6 |
| LM2575-5.0WU | Microchip | Active | 1A | 4V - 40V | 52kHz | -40°C to 125°C | TO-263-6 |
| LM2575-5.0WU-TR | Microchip | Active | 1A | 4V - 40V | 52kHz | -40°C to 125°C | TO-263-6 |
| MIC4575-5.0WU | Microchip | Active | 1.7A (Switch) | 4V - 24V | 200kHz | -40°C to 85°C | TO-263-6 |
| MIC4575-5.0WU-TR | Microchip | Active | 1.7A (Switch) | 4V - 24V | 200kHz | -40°C to 85°C | TO-263-6 |
Engineering Selection Recommendations
Tier 1 - Direct Replacements (Recommended for New Designs):
AP1501-50K5G-13 is the primary substitute from Diodes Incorporated, maintaining manufacturer continuity with active product status. This part matches the 3A output current and 150kHz switching frequency of the original AP3003S-5.0TRE1, with expanded input voltage range (4.5V to 40V) and identical package. The lower minimum operating temperature (-20°C versus -40°C) may require thermal analysis for applications requiring full -40°C operation.
LM2576-5.0WU and LM2576-5.0WU-TR from Microchip Technology provide full 3A output current with extended operating temperature range (-40°C to 125°C) and superior input voltage tolerance (4V to 40V). These parts are available in both tube and tape & reel packaging. The 52kHz switching frequency differs from the original 150kHz specification but remains within acceptable buck regulator operating parameters.
MIC4576-5.0WU and MIC4576-5.0WU-TR deliver 3A output current with 200kHz switching frequency and active product status. Input voltage range extends to 36V maximum. These parts are available in tube and tape & reel formats with -40°C to 85°C operating temperature matching the original specification.
SI-8050SD from Sanken Electric USA Inc. provides 3A output current with input voltage range of 7V to 40V, matching the original 7V minimum input requirement. This part offers extended operating temperature to 125°C and RoHS compliance with MSL-1 rating (superior moisture handling).
Tier 2 - Functional Equivalents (Current-Limited Applications):
LM2575-5.0WU and LM2575-5.0WU-TR are suitable only for applications requiring maximum 1A output current. These parts share the TO-263-6 package and 5V fixed output but deliver one-third the current capacity of the original part.
MIC4575-5.0WU and MIC4575-5.0WU-TR support buck-boost topology with 1.7A switch current, suitable for applications with variable input voltage requirements. Input voltage range is limited to 4V to 24V, restricting use in systems requiring the original 7V to 32V range.
All substitute parts maintain ROHS3 compliance and MSL-3 moisture sensitivity rating (or better) as specified for the original AP3003S-5.0TRE1.
Frequently Asked Questions (FAQ)
Q: Can LM2575-5.0WU replace AP3003S-5.0TRE1 in my design?
A: LM2575-5.0WU is not a direct replacement. While it shares the same 5V output, TO-263-6 package, and ROHS3 compliance, it delivers only 1A maximum output current compared to the 3A requirement of AP3003S-5.0TRE1. Use this part only if your application current demand is 1A or less.
Q: What is the difference between LM2576-5.0WU and LM2576-5.0WU-TR?
A: Both parts are electrically identical with 3A output current, 5V fixed output, and TO-263-6 package. The difference is packaging format: LM2576-5.0WU is supplied in tube packaging, while LM2576-5.0WU-TR is supplied in tape & reel format. Select based on your procurement and assembly requirements.
Q: Does MIC4575-5.0WU support the full 7V to 32V input range of the original part?
A: No. MIC4575-5.0WU operates with 4V to 24V input range, which does not cover the original 7V to 32V specification. This part is suitable only for applications with input voltage limited to 24V maximum.
Q: Why does SI-8050SD have a different switching frequency (60kHz) than the original (150kHz)?
A: Switching frequency is a design parameter that does not affect the core buck regulator function of converting 7V to 32V input to fixed 5V output at 3A. The 60kHz frequency in SI-8050SD remains within acceptable operating parameters for buck topology. Applications sensitive to switching frequency harmonics should evaluate EMI characteristics independently.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts maintain ROHS3 compliance. SI-8050SD additionally carries RoHS compliance with MSL-1 rating, providing superior moisture handling compared to the MSL-3 rating of other parts.
Q: Can I use MIC4576-5.0WU-TR in place of AP3003S-5.0TRE1 without circuit modifications?
A: MIC4576-5.0WU-TR is pin-compatible in the TO-263-6 package and delivers the required 3A output at 5V fixed voltage. The 200kHz switching frequency and 4V to 36V input range are compatible with the original specification. No circuit modifications are required for direct substitution, though PCB layout optimization for the higher switching frequency may improve performance.
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