MIC5249-3.0BMM Equivalent & Substitute Parts

Part Overview

The MIC5249-3.0BMM is a linear voltage regulator IC from Microchip Technology designed for positive fixed 3V 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 (UVLO) functionality. The part is currently discontinued at DiGi Electronics, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Output Voltage (Fixed)	3V
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

The MIC5249-3.0BMM has one direct equivalent substitute: MIC5249-3.0YMM. Both parts share identical electrical specifications and are derived from the same base product number (MIC5249). Substitution eligibility is determined by the following critical parameters:

Output voltage configuration: 3V fixed positive output
Output current capacity: 300mA
Maximum input voltage: 6V
Voltage dropout specification: 0.6V @ 300mA
Package type: 8-MSOP surface mount
Control and protection feature set: Enable, Reset, Over Current, Over Temperature, UVLO

The primary distinction between these parts is packaging format and product status, not electrical performance.

Parameter Comparison

Parameter	MIC5249-3.0BMM	MIC5249-3.0YMM
Manufacturer	Microchip Technology	Microchip Technology
Output Voltage (Fixed)	3V	3V
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
Product Status	Discontinued at DiGi Electronics	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging Format	Bulk	Tube

Engineering Selection Recommendations

The MIC5249-3.0YMM is the direct functional equivalent for the discontinued MIC5249-3.0BMM. Both parts deliver identical electrical performance across all specified parameters. Selection between these parts should be based on the following factors:

Product Status: The MIC5249-3.0YMM maintains active product status with Microchip Technology, ensuring long-term availability and continued manufacturing support. The MIC5249-3.0BMM is discontinued, limiting future procurement options.

Regulatory Compliance: The MIC5249-3.0YMM is ROHS3 compliant, meeting current environmental and regulatory requirements for electronic components. The MIC5249-3.0BMM is RoHS non-compliant, which may restrict use in applications subject to RoHS directives.

Packaging Considerations: The MIC5249-3.0YMM is supplied in tube packaging, while the MIC5249-3.0BMM uses bulk packaging. Tube packaging is standard for active production parts and facilitates automated assembly processes.

For new designs or production continuity, the MIC5249-3.0YMM is the appropriate selection. For legacy systems currently using the MIC5249-3.0BMM, direct substitution with the MIC5249-3.0YMM is electrically and mechanically compatible.

Frequently Asked Questions (FAQ)

Q: Can the MIC5249-3.0YMM directly replace the MIC5249-3.0BMM in existing designs?

A: Yes. Both parts are electrically and mechanically identical. The 8-MSOP package footprint, pinout, and all electrical specifications are equivalent. No circuit modifications are required.

Q: What is the difference between the two part numbers?

A: The primary differences are product status, RoHS compliance, and packaging format. The MIC5249-3.0YMM is the active production variant with ROHS3 compliance and tube packaging. The MIC5249-3.0BMM is discontinued and RoHS non-compliant.

Q: Are there any performance differences between these parts?

A: No. Output voltage, current capacity, dropout voltage, quiescent current, PSRR, control features, protection mechanisms, and operating temperature range are identical across both parts.

Q: What does the suffix difference (BMM vs YMM) indicate?

A: The suffix denotes packaging format and compliance status. BMM indicates bulk packaging with non-compliant status. YMM indicates tube packaging with ROHS3 compliance.

Q: Is the 8-MSOP package compatible with existing PCB layouts?

A: Yes. Both parts use the identical 8-MSOP package with 0.118" (3.00mm) width. PCB footprints, solder pad layouts, and assembly processes remain unchanged.

Q: What is the inventory status for these parts?

A: The MIC5249-3.0BMM has 720 pieces in stock but is discontinued. The MIC5249-3.0YMM has 5200 pieces in stock and is actively produced.

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