MIC5366-2.8YMT-TZ Equivalent & Substitute Parts

Part Overview

The MIC5366-2.8YMT-TZ is a linear voltage regulator IC from Microchip Technology, classified as a Power Management (PMIC) component. It delivers a fixed positive 2.8V output at 150mA with a maximum dropout voltage of 0.31V at rated current. The device operates across the industrial temperature range of -40°C to 125°C and is packaged in a 4-TMLF® surface mount configuration with an exposed pad.

This part is currently Active in product status with 10,595 units in stock. Equivalent and substitute parts are identified based on matching electrical performance parameters, output voltage specification, current delivery capability, and package compatibility. Alternative sources become necessary for supply chain optimization, cost reduction, or when primary inventory becomes constrained.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	2.8V
Output Current	150mA
Input Voltage (Max)	5.5V
Dropout Voltage (Max)	0.31V @ 150mA
Quiescent Current	39 µA
Package Type	4-TMLF® (1x1)
Operating Temperature	-40°C to 125°C
Control Features	Enable
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the MIC5366-2.8YMT-TZ are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Microchip Technology): MIC5375-2.8YMT-TR, MIC5375-2.8YMT-TZ, and MIC5376-2.8YMT-TR share identical output voltage (2.8V), output current (150mA), input voltage rating (5.5V), operating temperature range (-40°C to 125°C), package type (4-TMLF®), and protection features. These parts are direct functional replacements within the Microchip product family. Differences exist in dropout voltage performance and quiescent current specifications, which may provide improved efficiency in specific applications.

Cross-Manufacturer Alternatives: LD39020ADTPU28R (STMicroelectronics), BU28TD2WNVX-TL (Rohm Semiconductor), NCV8170AMX280TCG, and NCV8170BMX280TCG (onsemi) meet the core electrical requirements of 2.8V output and 150mA current delivery. These parts operate within the same temperature range and provide equivalent protection features. Package form factors differ (4-DFN, SSON004X1010, 4-XDFN), requiring PCB layout verification before substitution.

Substitution eligibility is determined by:

Fixed output voltage of 2.8V
Output current capability of 150mA or greater
Maximum input voltage of 5.5V or higher
Operating temperature range encompassing -40°C to 125°C
Surface mount packaging with exposed pad
Enable control feature and over-current/over-temperature protection

Parameter Comparison

Manufacturer Part Number	Manufacturer	Output Voltage	Output Current	Input Voltage (Max)	Dropout Voltage (Max)	Quiescent Current	Package Type	Operating Temperature	Product Status
MIC5366-2.8YMT-TZ	Microchip Technology	2.8V	150mA	5.5V	0.31V @ 150mA	39 µA	4-TMLF® (1x1)	-40°C to 125°C	Active
MIC5375-2.8YMT-TR	Microchip Technology	2.8V	150mA	5.5V	0.2V @ 150mA	45 µA	4-TMLF® (1x1)	-40°C to 125°C	Discontinued at DiGi Electronics
MIC5375-2.8YMT-TZ	Microchip Technology	2.8V	150mA	5.5V	0.2V @ 150mA	45 µA	4-TMLF® (1x1)	-40°C to 125°C	Obsolete
MIC5376-2.8YMT-TR	Microchip Technology	2.8V	150mA	5.5V	0.2V @ 150mA	45 µA	4-TMLF® (1x1)	-40°C to 125°C	Discontinued at DiGi Electronics
LD39020ADTPU28R	STMicroelectronics	2.8V	200mA	5.5V	0.35V @ 200mA	40 µA	4-DFN (1x1)	-40°C to 125°C	Active
BU28TD2WNVX-TL	Rohm Semiconductor	2.8V	200mA	6V	0.5V @ 200mA	60 µA	SSON004X1010	-40°C to 85°C	Active
NCV8170AMX280TCG	onsemi	2.8V	150mA	5.5V	0.315V @ 150mA	0.9 µA	4-XDFN (1x1)	-40°C to 125°C	Active
NCV8170BMX280TCG	onsemi	2.8V	150mA	5.5V	0.315V @ 150mA	0.9 µA	4-XDFN (1x1)	-40°C to 125°C	Active

Engineering Selection Recommendations

Microchip Technology Equivalents (MIC5375 and MIC5376 Series): These parts maintain identical package geometry and electrical specifications within the Microchip product line. MIC5375-2.8YMT-TR is available as an active alternative with 5,317 units in stock, though marked as discontinued at DiGi Electronics. MIC5375-2.8YMT-TZ and MIC5376-2.8YMT-TR are obsolete or discontinued, limiting their suitability for new designs or long-term supply assurance. All three deliver improved dropout voltage performance (0.2V versus 0.31V), beneficial for applications with tight power supply margins.

STMicroelectronics LD39020ADTPU28R: This part is Active with 10,100 units in stock and delivers 200mA output current, exceeding the MIC5366 specification. The 4-DFN package differs from the 4-TMLF® form factor, requiring PCB layout modification. Dropout voltage is 0.35V at 200mA, slightly higher than the MIC5366 at its rated current. This option provides supply continuity and higher current headroom for applications that can accommodate package changes.

Rohm Semiconductor BU28TD2WNVX-TL: This part is Active with 215,300 units in stock, offering the highest inventory availability. It supports 200mA output current and 6V maximum input voltage. The SSON004X1010 package differs from the MIC5366 footprint. Operating temperature range is limited to -40°C to 85°C, which excludes applications requiring full industrial temperature operation to 125°C. Quiescent current is elevated at 60 µA.

onsemi NCV8170AMX280TCG and NCV8170BMX280TCG: Both parts are Active with strong inventory (33,985 and 783 units respectively). They maintain 150mA output current matching the MIC5366 specification. The 4-XDFN package requires PCB layout verification. Quiescent current is exceptionally low at 0.9 µA, providing significant power efficiency advantage. Both parts carry AEC-Q100 automotive qualification, suitable for automotive and high-reliability applications. Operating temperature range matches the MIC5366 specification.

Recommendation Priority:

MIC5375-2.8YMT-TR for direct replacement within Microchip ecosystem with improved dropout performance
NCV8170AMX280TCG or NCV8170BMX280TCG for applications requiring ultra-low quiescent current and automotive-grade reliability
LD39020ADTPU28R for applications requiring higher output current with active product status
BU28TD2WNVX-TL only for applications with maximum operating temperature of 85°C and where package change is acceptable

Frequently Asked Questions (FAQ)

Q: Can MIC5375-2.8YMT-TR be used as a direct replacement for MIC5366-2.8YMT-TZ?

A: Yes. Both parts share identical output voltage (2.8V), output current (150mA), input voltage rating (5.5V), package type (4-TMLF®), operating temperature range (-40°C to 125°C), and protection features. The MIC5375 offers improved dropout voltage performance (0.2V versus 0.31V). No PCB layout changes are required. However, MIC5375-2.8YMT-TR is discontinued at DiGi Electronics, limiting long-term availability.

Q: What is the key difference between the onsemi NCV8170AMX280TCG and NCV8170BMX280TCG?

A: Both parts are electrically identical with matching output voltage, current, dropout voltage, and operating temperature specifications. The primary difference is inventory availability: NCV8170AMX280TCG has 33,985 units in stock versus 783 units for the NCV8170BMX280TCG. Both carry AEC-Q100 automotive qualification.

Q: Can the STMicroelectronics LD39020ADTPU28R replace the MIC5366 in existing designs?

A: Electrical substitution is feasible due to matching output voltage (2.8V), input voltage rating (5.5V), and operating temperature range (-40°C to 125°C). However, the 4-DFN package differs from the 4-TMLF® footprint, requiring PCB layout modification. The higher output current capability (200mA versus 150mA) is beneficial but not required. Dropout voltage is slightly higher at 0.35V.

Q: Why is the Rohm Semiconductor BU28TD2WNVX-TL not recommended as a primary substitute?

A: While the part is Active with exceptional inventory (215,300 units), the operating temperature range is limited to -40°C to 85°C, which excludes applications requiring operation to 125°C. The SSON004X1010 package differs from the MIC5366 footprint. Quiescent current is elevated at 60 µA compared to 39 µA for the MIC5366. This part is suitable only for applications with maximum operating temperature of 85°C.

Q: What does "Discontinued at DiGi Electronics" mean for the MIC5375-2.8YMT-TR?

A: The part remains in production by Microchip Technology but is no longer actively stocked or sold through DiGi Electronics distribution. Current inventory of 5,317 units is available through alternative distributors. For new designs, this part should not be considered for long-term supply assurance. The MIC5375-2.8YMT-TZ variant is marked as Obsolete, indicating end-of-life status.

Q: Are the onsemi NCV8170 parts suitable for automotive applications?

A: Yes. Both NCV8170AMX280TCG and NCV8170BMX280TCG carry AEC-Q100 automotive qualification and are graded for automotive use. They meet automotive reliability and testing standards. These parts are appropriate for automotive and high-reliability industrial applications requiring enhanced quality assurance.

Q: What is the significance of the 0.9 µA quiescent current in the onsemi NCV8170 parts?

A: The exceptionally low quiescent current (0.9 µA) compared to the MIC5366 (39 µA) provides significant power efficiency advantage in battery-powered or low-power standby applications. This specification indicates minimal current draw when the regulator is enabled but delivering no load current, reducing overall system power consumption.

Q: Do all substitute parts require PCB layout changes?

A: Microchip equivalents (MIC5375 and MIC5376 series) use identical 4-TMLF® packaging and require no PCB changes. Cross-manufacturer alternatives use different packages: LD39020ADTPU28R uses 4-DFN, BU28TD2WNVX-TL uses SSON004X1010, and onsemi parts use 4-XDFN. PCB layout verification is required for these alternatives.

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