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MIC39100-1.8BS TR Equivalent & Substitute Parts
Part Overview
The MIC39100-1.8BS TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.8V output at 1A current capacity in a SOT-223-3 surface mount package. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing design support and production continuity. The regulator provides over current, over temperature, and reverse polarity protection across an operating temperature range of -40°C to 125°C with a maximum input voltage of 16V and dropout voltage of 0.63V at 1A.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Microchip Technology |
| Category | Power Management (PMIC) |
| Output Voltage (Fixed) | 1.8V |
| Output Current | 1A |
| Input Voltage (Max) | 16V |
| Dropout Voltage (Max) | 0.63V @ 1A |
| Package Type | SOT-223-3 |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40°C to 125°C |
| Protection Features | Over Current, Over Temperature, Reverse Polarity |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the MIC39100-1.8BS TR is determined by strict equivalence across the following critical parameters:
- Output voltage specification: 1.8V fixed
- Output current capability: 1A minimum
- Maximum input voltage: 16V or greater
- Package compatibility: SOT-223-3 surface mount
- Protection features: Over current, over temperature, and reverse polarity protection
- Operating temperature range: -40°C to 125°C minimum
The MIC39100-1.8WS-TR meets all these criteria as a parametric equivalent, with the primary distinction being packaging format (Cut Tape & Digi-Reel versus Tape & Reel) and product status (Active versus Obsolete).
Parameter Comparison
| Parameter | MIC39100-1.8BS TR (Main) | MIC39100-1.8WS-TR (Substitute) |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Output Voltage | 1.8V | 1.8V |
| Output Current | 1A | 1A |
| Input Voltage (Max) | 16V | 16V |
| Dropout Voltage (Max) | 0.63V @ 1A | 0.63V @ 1A |
| Package / Case | TO-261-4, TO-261AA | TO-261-4, TO-261AA |
| Supplier Device Package | SOT-223-3 | SOT-223-3 |
| Operating Temperature | -40°C to 125°C | -40°C to 125°C |
| Protection Features | Over Current, Over Temperature, Reverse Polarity | Over Current, Over Temperature, Reverse Polarity |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 3 (168 Hours) | 3 (168 Hours) |
Engineering Selection Recommendations
The MIC39100-1.8WS-TR is the direct parametric equivalent for the obsolete MIC39100-1.8BS TR. Both parts share identical electrical specifications, thermal performance, and protection characteristics. The substitute part carries Active product status, ensuring continued availability and manufacturing support.
A significant compliance advantage exists with the MIC39100-1.8WS-TR: it is ROHS3 compliant, whereas the original part is RoHS non-compliant. This distinction is material for applications subject to RoHS regulatory requirements. Both parts maintain identical moisture sensitivity levels and REACH unaffected status.
The packaging difference between Tape & Reel (TR) and Cut Tape & Digi-Reel (CT) does not affect electrical or mechanical compatibility; this distinction pertains only to supply format and handling procedures.
Frequently Asked Questions (FAQ)
Q: Can the MIC39100-1.8WS-TR be used as a direct replacement for the MIC39100-1.8BS TR?
A: Yes. Both parts are manufactured by Microchip Technology with identical electrical specifications, output voltage, current capacity, dropout voltage, operating temperature range, and protection features. The SOT-223-3 package geometry is identical, permitting direct PCB substitution.
Q: What is the difference between Tape & Reel (TR) and Cut Tape & Digi-Reel (CT) packaging?
A: These designations describe supply and handling formats only. Tape & Reel packaging supplies components on continuous tape wound on reels for automated assembly. Cut Tape & Digi-Reel supplies the same components on cut tape segments or alternative reel formats. The physical component and package dimensions remain unchanged.
Q: Does the RoHS compliance difference affect circuit performance?
A: No. RoHS compliance status reflects manufacturing process and material composition standards, not electrical performance. The MIC39100-1.8WS-TR delivers identical electrical characteristics to the original part while meeting ROHS3 regulatory requirements.
Q: Are there any thermal or electrical performance differences between these parts?
A: No. Both parts specify identical maximum input voltage (16V), fixed output voltage (1.8V), output current (1A), dropout voltage (0.63V @ 1A), and operating temperature range (-40°C to 125°C).
Q: Why is the original part listed as obsolete?
A: Product obsolescence reflects Microchip Technology's manufacturing and support decisions. The MIC39100-1.8WS-TR remains in active production, providing equivalent functionality with improved regulatory compliance.
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