MIC5281-5.0YMMETR Microchip Integrated Circuit (Small Outline Packages) In Stock
MIC5281-5.0YMMETR is a fixed 5 V high-voltage linear regulator from Microchip, accepting inputs up to 125 V, with 2 V dropout and 0.025% line regulation, rated -40°C to +125°C. From $1.80 in stock worldwide shipping.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 9
- Lifecycle
- ACTIVE
- Datasheet
- MIC5281-5.0YMMETR Datasheet PDF
- Category
- Integrated Circuit
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 5 V output with wide 125 V absolute maximum input for high-voltage rail-sense applications
- 2 V dropout voltage at rated load minimizes power dissipation
- Excellent 0.025% line regulation across the full input range
- Single-output design in SOIC-8 for straightforward layout
- Industrial/automotive temperature range -40°C to +125°C junction temperature
- REACH-compliant construction meets environmental regulations
Applications
MIC5281-5.0YMMETR is suited for generating a stable 5 V logic supply directly from high-voltage DC rails such as 24 V, 48 V, or 110 V industrial bus lines without a switching pre-regulator. It serves as an always-on bias supply in motor drives, PLC I/O cards, and building-automation controllers where a small standby load must be powered from the high-voltage main rail. The wide input capability also benefits automotive or off-line designs that experience load-dump transients exceeding 60 V.
Specifications
| Reach Compliance Code | Compliant |
| Adjustability | FIXED |
| Dropout Voltage1-Nom | 2V |
| Input Voltage Absolute-Max | 125V |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e3 |
| Line Regulation-Max | 0.025% |
| Number of Outputs | 1 |
| Operating Temperature TJ-Max | 125°C |
| Operating Temperature TJ-Min | -40 °C |
| Output Current1-Max | 0.025A |
| Output Voltage1-Nom | 5V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP8,.19 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Packing Method | TAPE AND REEL |
| Qualification Status | Not Qualified |
| Subcategory | Other Regulators |
| Surface Mount | YES |
| Technology | BICMOS |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.635mm |
| Terminal Position | DUAL |
| Voltage Tolerance-Max | 5% |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum input voltage the MIC5281-5.0YMMETR can handle, and how does that affect its suitability for 48 V industrial supply rails?
The MIC5281-5.0YMMETR tolerates up to 125 V absolute maximum at its input, giving substantial margin above a 48 V industrial rail or even a 110 V DC control bus. This wide input range allows the regulator to survive load-dump spikes and power-line transients without external clamping, simplifying the surrounding circuit and reducing BOM cost in industrial automation applications.
How precise is the output regulation of MIC5281-5.0YMMETR, and is 0.025% line regulation sufficient for powering logic circuits?
With 0.025% line regulation, the output voltage shifts by less than 1.25 mV for every 5 V change in input voltage across its rated input range. For a 5 V output this means logic supply variation well within the ±5% tolerance window required by standard CMOS and TTL logic families, making the MIC5281-5.0YMMETR suitable for powering microcontroller VCC, optocoupler bias, and communication-interface supply rails.
Over what temperature range does MIC5281-5.0YMMETR operate, and how does its junction temperature rating affect thermal design in an SOIC-8 package?
The device operates from -40°C to +125°C junction temperature, matching the full industrial and automotive temperature ranges. In an SOIC-8 package with a typical junction-to-ambient thermal resistance of approximately 125°C/W, the designer must budget the power dissipation as (Vin - 5 V) × Iout to keep TJ below 125°C. At 48 V input with 20 mA output load, the 860 mW dissipation demands a PCB copper pour or heatsink clip to stay within the thermal budget.
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