MIC37100-3.0BS TR Equivalent & Substitute Parts

Part Overview

The MIC37100-3.0BS TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 3V output at 1A current capacity in a SOT-223-3 surface mount package. This device is classified as obsolete, making identification of equivalent substitute parts essential for ongoing production and maintenance applications. The regulator provides over-current and over-temperature protection suitable for low-power embedded systems and portable electronics requiring stable 3V rails.

Substiute Parts

MIC37100-3.0BS TR

Microchip TechnologyIn Stock: 945MIC37100-3.0BS TR Datasheet

Current PartRFQ

TLV1117LV30DCYR

Texas InstrumentsIn Stock: 45241TLV1117LV30DCYR Datasheet

Parametric EquivalentRFQ

TLV1117LV30DCYT

Texas InstrumentsIn Stock: 3563TLV1117LV30DCYT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC37100-3.0BS TR are identified based on the following critical parameters that determine functional equivalence:

Core Substitution Criteria:

• Output voltage (fixed): 3V
• Output current capability: 1A minimum
• Input voltage maximum: 5.5V or higher
• Output configuration: Positive fixed
• Protection features: Over-current and over-temperature protection
• Operating temperature range: -40°C to 125°C minimum
• Mounting type: Surface mount
• Package compatibility: SOT-223 family

The identified substitutes (TLV1117LV30DCYR and TLV1117LV30DCYT from Texas Instruments) meet all core electrical parameters and protection requirements. Both parts are available in SOT-223-4 packaging, which is mechanistically compatible with SOT-223-3 applications through proper PCB layout adaptation.

Parameter Comparison

Engineering Selection Recommendations

Both TLV1117LV30DCYR and TLV1117LV30DCYT from Texas Instruments serve as functional equivalents to the obsolete MIC37100-3.0BS TR. Selection between these two substitutes depends on inventory availability and supply chain considerations, as they are electrically identical.

Compliance Advantages of Substitutes:

• Both substitute parts are ROHS3 compliant, whereas the original MIC37100-3.0BS TR is non-compliant
• Both substitutes feature MSL rating of 1 (Unlimited), providing superior moisture handling compared to the original MSL rating of 3
• Both substitutes maintain Last Time Buy status, indicating extended availability windows for procurement planning

Electrical Considerations:

• The substitute parts operate at a maximum input voltage of 5.5V compared to the original 6V specification. Applications requiring input voltages above 5.5V require circuit redesign
• Dropout voltage is higher in substitutes (1.3V @ 800mA) compared to the original (0.5V @ 1A), affecting efficiency in low-headroom applications
• The SOT-223-4 package of substitutes requires PCB layout modification from the original SOT-223-3 configuration

Frequently Asked Questions (FAQ)

Q: Can TLV1117LV30DCYR and TLV1117LV30DCYT be used interchangeably?

A: Yes. Both parts are electrically identical and differ only in tape reel configuration. Selection is based on inventory availability and supply chain logistics.

Q: What is the primary difference between the original MIC37100-3.0BS TR and the substitute parts?

A: The substitute parts feature improved compliance (ROHS3), superior moisture sensitivity rating (MSL 1 vs MSL 3), and extended product lifecycle status (Last Time Buy vs Obsolete). The trade-off is a lower maximum input voltage (5.5V vs 6V) and higher dropout voltage specification.

Q: Are the SOT-223-3 and SOT-223-4 packages mechanically compatible?

A: SOT-223-4 and SOT-223-3 packages share the same footprint dimensions but differ in pin count. PCB layout modification is required to accommodate the fourth pin of the SOT-223-4 package. Consult device datasheets for precise pinout and land pattern specifications.

Q: What applications are affected by the lower maximum input voltage of the substitutes?

A: Applications with input voltage sources exceeding 5.5V require circuit redesign or alternative regulator selection. Typical 5V rail applications remain fully compatible.

Q: How does the higher dropout voltage of the substitutes impact system design?

A: The increased dropout voltage (1.3V @ 800mA vs 0.5V @ 1A) reduces efficiency in low-headroom applications. For designs with input voltages close to the 3V output requirement, the original MIC37100-3.0BS TR provides superior performance. Alternative low-dropout regulators may be required for such applications.