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MIC5259-3.3BML-TR Equivalent & Substitute Parts
Part Overview
The MIC5259-3.3BML-TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 3.3V output applications with 300mA current capacity. This Surface Mount device operates across -40°C to 125°C and integrates protection features including over-current, over-temperature, and under-voltage lockout (UVLO) functionality. The part is currently discontinued at DiGi Electronics, making identification of equivalent substitute components essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Output Voltage (Fixed) | 3.3V |
| Output Current | 300mA |
| Input Voltage (Max) | 6V |
| Voltage Dropout (Max) | 0.55V @ 300mA |
| Quiescent Current | 150 µA |
| Package Type | 6-DFN (2x2) |
| Operating Temperature Range | -40°C to 125°C |
| Protection Features | Over Current, Over Temperature, UVLO |
Substitute Part Grouping Explanation
Substitution eligibility for the MIC5259-3.3BML-TR is determined by strict equivalence across the following parameters:
- Output voltage configuration: 3.3V fixed positive output
- Output current rating: 300mA minimum
- Input voltage maximum: 6V
- Voltage dropout specification: 0.55V @ 300mA
- Package format: 6-DFN (2x2) Surface Mount
- Protection feature set: Over-current, over-temperature, and UVLO protection
- Operating temperature range: -40°C to 125°C
The MIC5259-3.3YML-TR meets all these criteria and qualifies as a parametric equivalent. The primary distinction between these parts is product status and regulatory compliance, not electrical or mechanical performance.
Parameter Comparison
| Parameter | MIC5259-3.3BML-TR | MIC5259-3.3YML-TR |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Output Voltage | 3.3V | 3.3V |
| Output Current | 300mA | 300mA |
| Input Voltage (Max) | 6V | 6V |
| Voltage Dropout (Max) | 0.55V @ 300mA | 0.55V @ 300mA |
| Quiescent Current | 150 µA | 150 µA |
| Supply Current (Max) | 250 µA | 250 µA |
| PSRR | 65dB ~ 53dB (10Hz ~ 10kHz) | 65dB ~ 53dB (10Hz ~ 10kHz) |
| Control Features | Enable | Enable |
| Protection Features | Over Current, Over Temperature, UVLO | Over Current, Over Temperature, UVLO |
| Operating Temperature | -40°C to 125°C | -40°C to 125°C |
| Package / Case | 6-VDFN Exposed Pad, 6-MLF® | 6-VDFN Exposed Pad, 6-MLF® |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Discontinued | Active |
| RoHS Status | Non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The MIC5259-3.3YML-TR is the direct substitute for the discontinued MIC5259-3.3BML-TR. Both parts share identical electrical specifications, performance characteristics, and mechanical packaging. The MIC5259-3.3YML-TR offers the additional advantage of active product status with ROHS3 compliance, making it the preferred selection for new designs and production continuity. Inventory availability is significantly higher for the substitute part (7653 Pcs vs. 735 Pcs), supporting supply chain reliability.
Frequently Asked Questions (FAQ)
Q: Are the MIC5259-3.3BML-TR and MIC5259-3.3YML-TR electrically interchangeable?
A: Yes. Both parts deliver identical electrical performance across all specified parameters including output voltage, current capacity, dropout voltage, quiescent current, and protection features.
Q: Can the MIC5259-3.3YML-TR be used as a direct replacement in existing PCB designs?
A: Yes. The parts share identical package specifications (6-DFN 2x2 Surface Mount) and pinout configuration, enabling direct substitution without PCB layout modifications.
Q: What is the significance of the RoHS compliance difference?
A: The MIC5259-3.3YML-TR meets ROHS3 compliance standards, while the original part does not. For applications subject to RoHS regulations or customer requirements, the substitute part satisfies these compliance obligations.
Q: Why is the MIC5259-3.3YML-TR recommended over the original part?
A: The original part is discontinued with limited inventory. The substitute part is in active production with substantially higher stock levels, ensuring supply availability and supporting long-term design support.
Q: Are there any performance trade-offs when using the substitute part?
A: No. The substitute part maintains all electrical and thermal specifications of the original design without performance degradation.
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