MIC39100-5.0BS TR Equivalent & Substitute Parts

Part Overview

The MIC39100-5.0BS TR is a linear voltage regulator IC from Microchip Technology designed to deliver a fixed 5V output at 1A maximum current in a surface-mount SOT-223-3 package. This device provides positive fixed output regulation with integrated protection features including over-current, over-temperature, and reverse polarity protection across an operating temperature range of -40°C to 125°C.

The MIC39100-5.0BS TR is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this regulator topology.

Key Parameters

Parameter	Value
Output Voltage (Fixed)	5V
Output Current	1A
Input Voltage (Max)	16V
Voltage Dropout (Max)	0.63V @ 1A
Output Configuration	Positive Fixed
Package Type	SOT-223-3
Operating Temperature Range	-40°C to 125°C
Protection Features	Over Current, Over Temperature, Reverse Polarity
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the MIC39100-5.0BS TR are qualified based on the following electrical and mechanical parameters:

Fixed 5V output voltage
1A maximum output current capability
Maximum input voltage of 16V
SOT-223-3 package compatibility
Surface-mount configuration
Operating temperature range of -40°C to 125°C
Integrated protection against over-current and over-temperature conditions

Parts meeting these criteria are functionally interchangeable at the circuit level. Differences in dropout voltage, additional protection features, compliance status, and packaging format (tape & reel versus cut tape) do not affect core substitution eligibility but may influence selection based on application requirements and supply chain considerations.

Parameter Comparison

Parameter	MIC39100-5.0BS TR	MIC39100-5.0WS-TR	SPX3940AM3-L-5-0/TR	SPX3940M3-L-5-0/TR
Manufacturer	Microchip Technology	Microchip Technology	MaxLinear, Inc.	MaxLinear, Inc.
Output Voltage	5V	5V	5V	5V
Output Current	1A	1A	1A	1A
Input Voltage (Max)	16V	16V	16V	16V
Voltage Dropout (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
Product Status	Obsolete	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	RoHS Compliant	RoHS Compliant
Moisture Sensitivity Level	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)
Packaging Format	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

MIC39100-5.0WS-TR is the direct Microchip Technology equivalent. This part maintains identical electrical specifications and package configuration while offering active product status and ROHS3 compliance. Selection of this part preserves design continuity within the Microchip product family and is appropriate for applications requiring regulatory compliance with modern environmental standards.

SPX3940AM3-L-5-0/TR and SPX3940M3-L-5-0/TR are manufacturer-recommended alternatives from MaxLinear, Inc. Both parts deliver superior performance characteristics including reduced dropout voltage (0.55V versus 0.63V) and enhanced protection features (short-circuit and transient voltage protection). These devices feature improved moisture sensitivity ratings (MSL 1 versus MSL 3) and full RoHS compliance. Selection of MaxLinear alternatives is appropriate for new designs or applications where enhanced performance margins and extended environmental protection are beneficial.

Frequently Asked Questions (FAQ)

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

A: Yes. Both parts are manufactured by Microchip Technology and share identical electrical specifications, output voltage, current rating, input voltage range, and SOT-223-3 package configuration. The primary difference is product status (active versus obsolete) and packaging format (cut tape versus tape & reel). Electrical performance and pinout are equivalent.

Q: What are the advantages of selecting SPX3940 series parts over the MIC39100 series?

A: SPX3940AM3-L-5-0/TR and SPX3940M3-L-5-0/TR offer lower dropout voltage (0.55V versus 0.63V), additional protection features including short-circuit and transient voltage protection, superior moisture sensitivity rating (MSL 1 unlimited versus MSL 3 168 hours), and full RoHS compliance. These characteristics provide enhanced performance margins and environmental durability.

Q: Are all substitute parts available in the same package configuration?

A: All substitute parts utilize the SOT-223-3 package for surface-mount applications. Packaging format differs: MIC39100-5.0BS TR and SPX3940 series are supplied in tape & reel format, while MIC39100-5.0WS-TR is available in cut tape and Digi-Reel® format. PCB footprint and soldering requirements remain identical across all variants.

Q: What compliance considerations apply when selecting a substitute part?

A: The MIC39100-5.0BS TR is RoHS non-compliant. MIC39100-5.0WS-TR provides ROHS3 compliance, and SPX3940 series parts provide full RoHS compliance. Applications subject to environmental regulations or customer requirements for RoHS-compliant components should select MIC39100-5.0WS-TR or SPX3940 alternatives.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. All substitute parts share identical SOT-223-3 pinout and package footprint. No PCB layout modifications are required. Electrical performance is equivalent or superior, ensuring functional compatibility in existing circuit designs without redesign.

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