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MIC29201-3.3BT Linear Voltage Regulator Equivalent & Substitute Parts
Part Overview
The MIC29201-3.3BT is a linear voltage regulator IC from Microchip Technology designed for positive fixed 3.3V output applications with 400mA current capacity in a TO-220-5 package. This part is classified as obsolete, making identification of active equivalent alternatives essential for ongoing production and maintenance applications. The MIC29201-3.3BT provides regulated 3.3V output with integrated protection features including load dump, over-current, and reverse polarity protection, suitable for embedded systems and industrial control applications requiring stable low-voltage power distribution.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Output Voltage (Fixed) | 3.3V |
| Output Current | 400mA |
| Input Voltage (Max) | 26V |
| Voltage Dropout (Max) | 0.75V @ 400mA |
| Quiescent Current | 300 µA |
| Package Type | TO-220-5 |
| Operating Temperature Range | -40°C ~ 125°C |
| Protection Features | Load Dump, Over Current, Reverse Polarity |
| Control Features | Enable |
Substitute Part Grouping Explanation
Substitution for the MIC29201-3.3BT is determined by strict equivalence across the following critical parameters:
- Fixed output voltage of 3.3V
- Output current rating of 400mA
- Maximum input voltage of 26V
- Voltage dropout specification of 0.75V @ 400mA
- Quiescent current of 300 µA
- TO-220-5 package configuration
- Operating temperature range of -40°C ~ 125°C
- Identical protection feature set (Load Dump, Over Current, Reverse Polarity)
- Enable control functionality
The MIC29201-3.3WT meets all parametric requirements for direct substitution with the MIC29201-3.3BT. Both parts share identical electrical specifications and mechanical packaging, with the primary distinction being product status and compliance certification.
Parameter Comparison
| Parameter | MIC29201-3.3BT | MIC29201-3.3WT |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Output Voltage (Fixed) | 3.3V | 3.3V |
| Output Current | 400mA | 400mA |
| Input Voltage (Max) | 26V | 26V |
| Voltage Dropout (Max) | 0.75V @ 400mA | 0.75V @ 400mA |
| Quiescent Current | 300 µA | 300 µA |
| Supply Current (Max) | 12 mA | 12 mA |
| Package / Case | TO-220-5 | TO-220-5 |
| Operating Temperature | -40°C ~ 125°C | -40°C ~ 125°C |
| Protection Features | Load Dump, Over Current, Reverse Polarity | Load Dump, Over Current, Reverse Polarity |
| Control Features | Enable | Enable |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Packaging Format | Bulk | Tube |
Engineering Selection Recommendations
The MIC29201-3.3WT is the direct parametric equivalent for the obsolete MIC29201-3.3BT. Selection of the MIC29201-3.3WT is appropriate for applications requiring:
- Continued supply of the MIC29201 3.3V 400mA regulator function
- Active product status with ongoing manufacturer support
- ROHS3 compliance certification for regulated markets and OEM requirements
- Identical electrical performance and thermal characteristics
- Through-hole TO-220-5 mounting compatibility
The MIC29201-3.3WT maintains full functional and mechanical compatibility with the obsolete MIC29201-3.3BT across all specified electrical parameters and operating conditions.
Frequently Asked Questions (FAQ)
Q: Can the MIC29201-3.3WT directly replace the MIC29201-3.3BT in existing designs?
A: Yes. The MIC29201-3.3WT is a parametric equivalent with identical output voltage (3.3V), output current (400mA), input voltage rating (26V), dropout voltage (0.75V @ 400mA), and TO-220-5 package configuration. All electrical specifications and protection features are equivalent.
Q: What is the primary difference between these two parts?
A: The MIC29201-3.3BT is obsolete, while the MIC29201-3.3WT is active. The MIC29201-3.3WT also carries ROHS3 compliance certification, whereas the MIC29201-3.3BT is RoHS non-compliant. Packaging format differs (bulk versus tube), but electrical performance is identical.
Q: Are there any thermal or performance differences between the MIC29201-3.3BT and MIC29201-3.3WT?
A: No. Both parts operate across the same temperature range (-40°C ~ 125°C) and maintain identical quiescent current (300 µA), supply current (12 mA), and protection feature specifications.
Q: Is the TO-220-5 package pinout identical between these parts?
A: Yes. Both parts use the TO-220-5 package configuration with identical pin assignments and mechanical dimensions, enabling direct PCB compatibility.
Q: Should RoHS compliance be a factor in selecting between these parts?
A: RoHS compliance requirements depend on application and regulatory jurisdiction. The MIC29201-3.3WT meets ROHS3 standards, while the MIC29201-3.3BT does not. For applications subject to RoHS regulations or OEM requirements, the MIC29201-3.3WT is the appropriate selection.
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