MIC5249-2.8BMM Equivalent & Substitute Parts

Part Overview

The MIC5249-2.8BMM is a linear voltage regulator IC from Microchip Technology designed for positive fixed 2.8V output applications with 300mA current capacity. This device is classified as a Power Management PMIC and features integrated protection mechanisms including over-current, over-temperature, and under-voltage lockout protection. The MIC5249-2.8BMM is currently discontinued at DiGi Electronics, making identification of suitable substitute parts essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Output Voltage (Fixed)	2.8V
Output Current	300mA
Input Voltage (Max)	6V
Voltage Dropout (Max)	0.6V @ 300mA
Quiescent Current	200 µA
PSRR	65dB (120Hz)
Control Features	Enable, Reset
Protection Features	Over Current, Over Temperature, Under Voltage Lockout (UVLO)
Operating Temperature Range	-40°C ~ 125°C
Package Type	8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the MIC5249-2.8BMM are identified based on strict electrical and mechanical parameter matching within the MIC5249 product family. The substitution criteria are:

Same base product number (MIC5249)
Identical output voltage specification (2.8V fixed)
Identical output current rating (300mA)
Identical package type (8-MSOP)
Identical electrical performance parameters (input voltage, dropout voltage, quiescent current, PSRR, control features, protection features, operating temperature range)

The primary difference between the main part and its substitute is the packaging format (Bulk versus Tube) and product status (Discontinued versus Active).

Parameter Comparison

Parameter	MIC5249-2.8BMM	MIC5249-2.8YMM
Manufacturer	Microchip Technology	Microchip Technology
Output Voltage (Fixed)	2.8V	2.8V
Output Current	300mA	300mA
Input Voltage (Max)	6V	6V
Voltage Dropout (Max)	0.6V @ 300mA	0.6V @ 300mA
Quiescent Current	200 µA	200 µA
PSRR	65dB (120Hz)	65dB (120Hz)
Control Features	Enable, Reset	Enable, Reset
Protection Features	Over Current, Over Temperature, Under Voltage Lockout (UVLO)	Over Current, Over Temperature, Under Voltage Lockout (UVLO)
Operating Temperature Range	-40°C ~ 125°C	-40°C ~ 125°C
Package Type	8-MSOP (0.118", 3.00mm Width)	8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount	Surface Mount
Packaging Format	Bulk	Tube
Product Status	Discontinued at DiGi Electronics	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The MIC5249-2.8YMM is a direct functional equivalent to the MIC5249-2.8BMM with identical electrical specifications and package configuration. Selection between these parts should be based on the following criteria:

For new designs or production requiring regulatory compliance, the MIC5249-2.8YMM is the appropriate choice due to its Active product status and ROHS3 compliance certification. This part maintains full electrical and mechanical compatibility while offering improved supply chain availability.

For legacy system support or applications where RoHS non-compliance is acceptable, the MIC5249-2.8BMM remains functionally viable if inventory is available, though its Discontinued status limits long-term sourcing options.

The difference in packaging format (Bulk versus Tube) does not affect electrical performance or PCB integration and is primarily a logistics consideration for procurement and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the MIC5249-2.8YMM be used as a direct replacement for the MIC5249-2.8BMM?

A: Yes. Both parts are identical in electrical performance, output voltage, current rating, package type, and all functional parameters. The MIC5249-2.8YMM is a direct substitute with the same 8-MSOP package footprint and pinout.

Q: What is the difference between Bulk and Tube packaging?

A: Packaging format refers to the delivery method. Bulk packaging typically involves loose components or tape-and-reel format for high-volume assembly, while Tube packaging contains components in protective tubes for smaller quantities. Both formats contain the same component with identical electrical specifications.

Q: Why is the MIC5249-2.8BMM discontinued?

A: Product discontinuation at DiGi Electronics is a supply chain decision. The MIC5249-2.8YMM remains in active production from Microchip Technology and serves as the current production equivalent.

Q: Does RoHS compliance affect electrical performance?

A: No. RoHS compliance is a material composition standard that does not alter electrical characteristics, performance, or functionality. Both parts deliver identical electrical performance.

Q: Are there any pin or footprint differences between these parts?

A: No. Both parts use the identical 8-MSOP package with 0.118" width and 3.00mm dimensions. PCB layouts and schematics require no modification when substituting between these parts.

Q: What inventory status should I consider for procurement?

A: The MIC5249-2.8YMM has 776 pieces in stock as new original inventory. The MIC5249-2.8BMM has 888 pieces available but is discontinued. For ongoing production, the MIC5249-2.8YMM is the recommended choice due to its Active status.

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