MIC39100-5.0BS Equivalent & Substitute Parts

Part Overview

The MIC39100-5.0BS is a linear voltage regulator IC from Microchip Technology designed for positive fixed 5V output at 1A current capacity in a SOT-223-3 surface mount package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The device provides over current, over temperature, and reverse polarity protection across an operating temperature range of -40°C to 125°C with a maximum input voltage of 16V and dropout voltage of 0.63V at 1A.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Part Number	MIC39100-5.0BS
Category	Power Management (PMIC)
Output Voltage	5V Fixed
Output Current	1A
Input Voltage (Max)	16V
Dropout Voltage (Max)	0.63V @ 1A
Package Type	SOT-223-3
Mounting Type	Surface Mount
Operating Temperature	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity
Product Status	Obsolete
RoHS Status	RoHS Non-Compliant

Substitute Part Grouping Explanation

Substitution for the MIC39100-5.0BS is determined by strict equivalence across the following electrical and mechanical parameters:

Output voltage: 5V fixed
Output current capacity: 1A minimum
Input voltage rating: 16V maximum or higher
Package type: SOT-223-3
Mounting type: Surface mount
Operating temperature range: -40°C to 125°C minimum
Protection features: Over current and over temperature protection required

The MIC39100-5.0WS represents a direct equivalent from the same manufacturer with identical electrical specifications but improved RoHS compliance status and active product status. The SPX3940AM3-L-5-0/TR and SPX3940M3-L-5-0/TR from MaxLinear, Inc. meet all electrical and mechanical substitution criteria with enhanced protection features and superior dropout voltage performance.

Parameter Comparison

Parameter	MIC39100-5.0BS	MIC39100-5.0WS	SPX3940AM3-L-5-0/TR	SPX3940M3-L-5-0/TR
Manufacturer	Microchip Technology	Microchip Technology	MaxLinear, Inc.	MaxLinear, Inc.
Output Voltage	5V Fixed	5V Fixed	5V Fixed	5V Fixed
Output Current	1A	1A	1A	1A
Input Voltage (Max)	16V	16V	16V	16V
Dropout Voltage (Max)	0.63V @ 1A	0.63V @ 1A	0.55V @ 1A	0.55V @ 1A
Package Type	SOT-223-3	SOT-223-3	SOT-223-3	SOT-223-3
Operating Temperature	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity, Short Circuit, Transient Voltage	Over Current, Over Temperature, Reverse Polarity, Short Circuit, Transient Voltage
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS Non-Compliant	RoHS3 Compliant	RoHS Compliant	RoHS Compliant
MSL Rating	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)
Packaging	Bulk	Tube	Tape & Reel	Tape & Reel

Engineering Selection Recommendations

For new designs or ongoing production requiring the MIC39100-5.0BS, the MIC39100-5.0WS is the primary equivalent choice, offering identical electrical performance with active product status and RoHS3 compliance. This part maintains full compatibility with existing PCB layouts and assembly processes.

For applications where enhanced protection features and improved dropout voltage performance provide system benefits, the SPX3940AM3-L-5-0/TR and SPX3940M3-L-5-0/TR from MaxLinear represent qualified alternatives. Both parts meet all electrical and mechanical substitution requirements with additional short circuit and transient voltage protection. The SPX3940 series also provides superior moisture sensitivity rating (MSL 1 vs. MSL 3), beneficial for extended storage and high-humidity environments.

All substitute parts maintain the SOT-223-3 package footprint, surface mount compatibility, and operating temperature range of the original part. Selection between alternatives should be based on product availability, compliance requirements, and specific application protection needs.

Frequently Asked Questions (FAQ)

Q: Can the MIC39100-5.0WS be used as a direct replacement for the MIC39100-5.0BS?

A: Yes. The MIC39100-5.0WS provides identical electrical specifications including 5V fixed output, 1A current capacity, 16V maximum input voltage, and 0.63V dropout voltage at 1A. Both parts use the SOT-223-3 package and operate across -40°C to 125°C. The primary differences are product status (active vs. obsolete) and RoHS compliance (RoHS3 vs. non-compliant).

Q: What are the key differences between Microchip and MaxLinear substitute options?

A: The SPX3940AM3-L-5-0/TR and SPX3940M3-L-5-0/TR from MaxLinear provide improved dropout voltage (0.55V vs. 0.63V at 1A) and additional protection features including short circuit and transient voltage protection. Both maintain identical output voltage, current capacity, input voltage rating, and package type. MaxLinear parts feature MSL 1 rating compared to MSL 3 for Microchip variants.

Q: Are there PCB layout considerations when substituting these parts?

A: No. All substitute parts use the identical SOT-223-3 package footprint and pinout, requiring no PCB modifications. Surface mount assembly processes remain unchanged.

Q: Which substitute part should be selected for new production?

A: The MIC39100-5.0WS is recommended for designs requiring Microchip Technology components. The SPX3940AM3-L-5-0/TR or SPX3940M3-L-5-0/TR are recommended when MaxLinear components are acceptable and enhanced protection features or improved dropout voltage performance are beneficial.

Q: What is the significance of the MSL rating difference?

A: MSL 1 (MaxLinear parts) indicates unlimited shelf life under controlled storage conditions, while MSL 3 (Microchip parts) limits storage to 168 hours after moisture exposure. For applications with extended component storage or high-humidity environments, MSL 1 rated parts provide greater flexibility.

Q: Are all substitute parts RoHS compliant?

A: The MIC39100-5.0WS is RoHS3 compliant. The SPX3940AM3-L-5-0/TR and SPX3940M3-L-5-0/TR are RoHS compliant. The original MIC39100-5.0BS is RoHS non-compliant.

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