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MIC5239-3.0YS Equivalent & Substitute Parts
Part Overview
The MIC5239-3.0YS is a linear voltage regulator IC from Microchip Technology designed for positive fixed 3V output applications. This Surface Mount device in SOT-223-3 package delivers 500mA output current with integrated protection features including over-current, over-temperature, over-voltage, and reverse polarity protection. The part is Active status and ROHS3 compliant, making it suitable for modern electronic applications requiring regulated 3V power distribution.
Substitute parts are identified when design requirements change, inventory constraints occur, or when alternative sourcing becomes necessary while maintaining functional compatibility within specified electrical and mechanical parameters.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Category | Power Management (PMIC) |
| Output Voltage (Fixed) | 3V |
| Output Current | 500mA |
| Input Voltage (Max) | 30V |
| Voltage Dropout (Max) | 0.35V @ 500mA (Typ) |
| Package Type | SOT-223-3 |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C ~ 125°C |
| Protection Features | Over Current, Over Temperature, Over Voltage, Reverse Polarity |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the MIC5239-3.0YS is determined by the following critical parameters:
- Fixed output voltage of 3V
- SOT-223-3 package compatibility
- Surface Mount technology
- Positive output configuration
- ROHS3 compliance
- Active product status
The MCP1804T-3002I/DB qualifies as a substitute based on matching output voltage (3V), identical package type (SOT-223-3), and equivalent compliance certifications. However, this substitute operates within reduced electrical specifications: maximum output current of 150mA versus 500mA, maximum input voltage of 28V versus 30V, and operating temperature range of -40°C to 85°C versus -40°C to 125°C.
Parameter Comparison
| Parameter | MIC5239-3.0YS | MCP1804T-3002I/DB |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Output Voltage (Fixed) | 3V | 3V |
| Output Current | 500mA | 150mA |
| Input Voltage (Max) | 30V | 28V |
| Voltage Dropout (Max) | 0.35V @ 500mA (Typ) | 1.7V @ 100mA |
| Quiescent Current (Iq) | 45 µA | 105 µA |
| Package Type | SOT-223-3 | SOT-223-3 |
| Mounting Type | Surface Mount | Surface Mount |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 85°C |
| Protection Features | Over Current, Over Temperature, Over Voltage, Reverse Polarity | Over Current, Over Temperature |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Active | Active |
Engineering Selection Recommendations
Both the MIC5239-3.0YS and MCP1804T-3002I/DB are Active products from Microchip Technology with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing standards.
Selection between these parts depends on application current requirements. The MIC5239-3.0YS supports full 500mA output current with superior dropout voltage performance (0.35V typical) and extended operating temperature range to 125°C. The MCP1804T-3002I/DB is suitable only for applications requiring 150mA or less output current, with higher dropout voltage (1.7V @ 100mA) and limited temperature operation to 85°C maximum.
The MIC5239-3.0YS provides additional protection against reverse polarity and over-voltage conditions, while the MCP1804T-3002I/DB offers reduced quiescent current consumption (105 µA versus 45 µA) and lower moisture sensitivity level (MSL 1 versus MSL 3).
Frequently Asked Questions (FAQ)
Q: Can MCP1804T-3002I/DB replace MIC5239-3.0YS in all applications?
A: No. The MCP1804T-3002I/DB is limited to 150mA maximum output current. Substitution is valid only for applications requiring 150mA or less. Applications requiring the full 500mA capability of the MIC5239-3.0YS cannot use this substitute.
Q: What are the package compatibility considerations?
A: Both parts use identical SOT-223-3 package and Surface Mount technology. PCB footprints and soldering processes are directly compatible.
Q: How do dropout voltage differences affect circuit design?
A: The MIC5239-3.0YS exhibits 0.35V typical dropout at 500mA, while the MCP1804T-3002I/DB shows 1.7V at 100mA. Higher dropout voltage in the substitute requires greater input voltage headroom to maintain stable 3V output.
Q: Are there temperature range limitations with the substitute?
A: Yes. The MCP1804T-3002I/DB operates only to 85°C maximum, compared to 125°C for the MIC5239-3.0YS. Applications requiring operation above 85°C must use the primary part.
Q: What protection differences exist between these parts?
A: The MIC5239-3.0YS includes reverse polarity and over-voltage protection in addition to over-current and over-temperature protection. The MCP1804T-3002I/DB provides only over-current and over-temperature protection.
Q: Do compliance certifications differ between these parts?
A: Both parts are ROHS3 compliant and REACH unaffected. Regulatory compliance is equivalent for both options.
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