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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators > MIC5281-3.3YMM-TR
Microchip Technology
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MIC5281-3.3YMM-TR

In Stock 7297 pcs Reference Price(In US Dollars)
1+
$1.6895
10+
$1.4467
30+
$1.2939
100+
$1.1382
500+
$1.0682
1000+
$1.0369
Manufacturer Part Number:
MIC5281-3.3YMM-TR
Manufacturer / Brand
Microchip Technology
Part of Description:
IC REG LINEAR 3.3V 25MA 8MSOP
Datasheets:
MIC5281-3.3YMM-TR(1).pdfMIC5281-3.3YMM-TR(2).pdfMIC5281-3.3YMM-TR(3).pdfMIC5281-3.3YMM-TR(4).pdf
Lead Free Status / RoHS Status:
ROHS3 Compliant
Stock Condition:
New original, 7297 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number MIC5281-3.3YMM-TR
Manufacturer / Brand Microchip Technology
Stock Quantity 7297 pcs Stock
Category Integrated Circuits (ICs) > Power Management (PMIC) - Voltage Regulators - Linear, Low Drop Out (LDO) Regulators
Description IC REG LINEAR 3.3V 25MA 8MSOP
Lead Free Status / RoHS Status: ROHS3 Compliant
Voltage Dropout (Max) 3V @ 25mA
Voltage - Output (Min/Fixed) 3.3V
Voltage - Output (Max) -
Voltage - Input (Max) 120V
Supplier Device Package 8-MSOP
Series -
Protection Features Over Current, Over Temperature
Package / Case 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Package Tape & Reel (TR)
PSRR 90dB (20kHz ~ 2MHz)
Output Type Fixed
Output Configuration Positive
Operating Temperature -40°C ~ 125°C
Number of Regulators 1
Mounting Type Surface Mount
Current - Quiescent (Iq) 11 µA
Current - Output 25mA
Control Features -
Base Product Number MIC5281

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



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Frequently Asked Questions

What are the key design constraints when using the MIC5281-3.3YMM-TR in high-voltage input applications up to 120V?
The MIC5281-3.3YMM-TR supports an input voltage up to 120V, but designers must account for significant power dissipation due to the 3V maximum dropout at 25mA. For example, at 120V input and full load, power dissipation reaches approximately 2.9W, requiring careful thermal management even in the 8-MSOP package. Additionally, input transient protection and filtering are essential to avoid voltage spikes that could exceed absolute maximum ratings, especially in industrial or automotive environments.
Can the MIC5281-3.3YMM-TR be used as a drop-in replacement for the LM7805 in 3.3V applications?
No, the MIC5281-3.3YMM-TR is not a direct replacement for the LM7805 due to fundamental differences in input voltage range, package, and dropout characteristics. While both are linear regulators, the LM7805 is a 5V fixed-output device with a typical input limit of 35V, whereas the MIC5281-3.3YMM-TR provides a fixed 3.3V output and supports up to 120V input. However, it can replace higher-voltage 3.3V linear regulators like the MIC2940A-3.3WS in certain high-input scenarios, provided the output current and thermal design are compatible.
What are the risks of operating the MIC5281-3.3YMM-TR near its maximum input voltage in long-term industrial applications?
Prolonged operation near 120V input increases thermal stress on the internal pass element and can accelerate degradation of the die and bond wires, especially if PCB copper area for heat dissipation is insufficient. Although the device includes over-temperature protection, repeated thermal cycling may reduce long-term reliability. Engineers should derate input voltage or implement external pre-regulation in mission-critical systems to extend operational life.
How does the 11 µA quiescent current of the MIC5281-3.3YMM-TR impact battery-powered designs?
The ultra-low 11 µA quiescent current makes the MIC5281-3.3YMM-TR suitable for always-on or sleep-mode applications such as remote sensors or metering systems. However, total system efficiency must consider the high dropout voltage at full load; for low-current loads (<1mA), the regulator remains efficient, but at 25mA with a high input voltage, efficiency drops significantly due to I²R losses. Designers should evaluate whether a switching regulator would offer better overall efficiency despite higher quiescent current.
Is the MIC5281-3.3YMM-TR suitable for noise-sensitive analog circuits given its 90dB PSRR?
Yes, the 90dB power supply rejection ratio (PSRR) from 20kHz to 2MHz makes the MIC5281-3.3YMM-TR well-suited for powering sensitive analog components like ADCs, op-amps, or RF modules. However, PSRR degrades at higher frequencies (>2MHz), so additional LC or ferrite bead filtering may be required in environments with high-frequency switching noise from nearby DC-DC converters or digital logic.
What layout considerations are critical when designing with the MIC5281-3.3YMM-TR in an 8-MSOP package?
The 8-MSOP package has limited thermal dissipation capability, so a solid ground plane connected to the exposed pad (if present) and adequate copper pour on the output and input pins are essential. Input and output capacitors must be placed within 5mm of the respective pins to minimize loop inductance and ensure stability. Additionally, high-voltage traces should maintain sufficient creepage distance to prevent arcing, especially in humid or contaminated environments.
Can the MIC5281-3.3YMM-TR be paralleled to increase output current beyond 25mA?
No, the MIC5281-3.3YMM-TR is not designed for current sharing or paralleling due to lack of current-balancing features and tight output voltage tolerances. Attempting to parallel units may result in uneven current distribution, thermal runaway, or premature failure. For higher current requirements, consider using a dedicated switching regulator or a higher-current LDO such as the MCP1700 series with external pass elements.
What alternatives exist if the MIC5281-3.3YMM-TR is unavailable, and what trade-offs should be considered?
Potential alternatives include the MIC2940A-3.3WS (up to 26V input, higher current) or the TPS7A4700 (low-noise, 36V input), but neither supports 120V input. For high-voltage 3.3V regulation, the LT3012B or similar high-voltage LDOs from Analog Devices may be used, though they typically come in larger packages and have higher quiescent current. Designers must reevaluate thermal performance, footprint, and BOM cost when substituting.
How does the operating temperature range of -40°C to 125°C affect reliability in outdoor or automotive applications?
The MIC5281-3.3YMM-TR’s full operating range covers most automotive and industrial environments, but performance at temperature extremes must be verified. At -40°C, capacitor ESR increases, potentially affecting stability; low-ESR ceramic capacitors are recommended. At 125°C junction temperature, output accuracy and dropout voltage may drift, and thermal shutdown could activate under sustained high-load conditions. Proper derating and thermal modeling are essential for reliable operation.
Does the MIC5281-3.3YMM-TR require specific input or output capacitors for stability, and what happens if they are omitted?
The MIC5281-3.3YMM-TR requires a minimum 1µF ceramic capacitor on both input and output for stability. Omitting these capacitors can lead to oscillations, increased output noise, or startup failure, particularly with long input leads that introduce parasitic inductance. The output capacitor must have low ESR (typically <1Ω) to maintain phase margin; tantalum or aluminum electrolytic capacitors are not recommended unless specifically validated in the application.

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