MIC37100-1.5WS-TR Equivalent & Substitute Parts

Part Overview

The MIC37100-1.5WS-TR is a linear voltage regulator IC from Microchip Technology, delivering a fixed 1.5V output at 1A in a SOT-223-3 surface mount package. This device is classified as Active product status and is ROHS3 compliant. Substitute parts are necessary when the primary part reaches end-of-life, inventory constraints occur, or design requirements necessitate alternative electrical characteristics such as higher output current, improved dropout voltage performance, or extended input voltage range.

Key Parameters

Parameter	Value
Manufacturer Part Number	MIC37100-1.5WS-TR
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Packaging	Tape & Reel (TR)
Output Voltage (Fixed)	1.5V
Output Current	1A
Input Voltage (Max)	6V
Dropout Voltage (Max)	0.5V @ 1A
Package / Case	TO-261-4, TO-261AA
Supplier Device Package	SOT-223-3
Operating Temperature	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the MIC37100-1.5WS-TR are classified into two categories based on substitution criteria:

MFR Recommended Substitutes meet all critical electrical and mechanical parameters:

Fixed output voltage of 1.5V
Output current of 1A or greater
Maximum input voltage of 6V or greater
SOT-223-3 or SOT-223-4 package compatibility
Surface mount mounting type
ROHS3 compliance

Parametric Equivalents satisfy core functional requirements but may differ in secondary characteristics such as dropout voltage, quiescent current, or product status. These parts maintain electrical compatibility within the specified parameter ranges.

The following key parameters determine substitution eligibility:

Output voltage (fixed at 1.5V)
Output current (minimum 1A)
Input voltage range (minimum 6V maximum)
Package type (SOT-223 variants)
Operating temperature range (-40°C to 125°C minimum)
Protection features (Over Current and Over Temperature required)

Parameter Comparison

Parameter	MIC37100-1.5WS-TR	AP7361-15E-13	AP7361-15ER-13	LT1963AEST-1.5#PBF	LT1963AEST-1.5#TRPBF	TLV1117LV15DCYR	TLV1117LV15DCYT
Manufacturer	Microchip Technology	Diodes Incorporated	Diodes Incorporated	Analog Devices Inc.	Analog Devices Inc.	Texas Instruments	Texas Instruments
Output Voltage (Fixed)	1.5V	1.5V	1.5V	1.5V	1.5V	1.5V	1.5V
Output Current	1A	1A	1A	1.5A	1.5A	1A	1A
Input Voltage (Max)	6V	6V	6V	20V	20V	5.5V	5.5V
Dropout Voltage (Max)	0.5V @ 1A	0.7V @ 1A	0.7V @ 1A	0.55V @ 1.5A	0.55V @ 1.5A	1.3V @ 800mA	1.3V @ 800mA
Quiescent Current (Iq)	Not specified	90 µA	90 µA	1.5 mA	1.5 mA	100 µA	100 µA
Package / Case	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA	TO-261-4, TO-261AA
Supplier Device Package	SOT-223-3	SOT-223-3	SOT-223-R	SOT-223-3	SOT-223-3	SOT-223-4	SOT-223-4
Operating Temperature	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Protection Features	Over Current, Over Temperature	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Short Circuit	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature	Over Current, Over Temperature
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active	Active	Last Time Buy	Last Time Buy
Packaging Type	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

MFR Recommended Substitutes (Primary Selection):

AP7361-15E-13 and AP7361-15ER-13 from Diodes Incorporated are direct functional equivalents with identical output voltage and current specifications. Both maintain ROHS3 compliance and Active product status. The AP7361-15ER-13 variant uses SOT-223-R packaging and has significantly higher inventory availability (82,700 pcs). These parts are suitable for designs requiring immediate substitution with minimal electrical parameter deviation.

LT1963AEST-1.5#TRPBF from Analog Devices Inc. offers enhanced performance characteristics including higher output current (1.5A), extended input voltage range (20V maximum), and improved dropout voltage (0.55V @ 1.5A). This part maintains Active product status and ROHS3 compliance. The Tape & Reel packaging aligns with production requirements. Selection of this part is appropriate when designs require higher current capacity or extended input voltage tolerance.

Parametric Equivalents (Secondary Selection):

TLV1117LV15DCYR and TLV1117LV15DCYT from Texas Instruments satisfy core functional requirements but carry Last Time Buy product status. Both parts maintain ROHS3 compliance and operating temperature range compatibility. The higher dropout voltage (1.3V @ 800mA) and lower maximum input voltage (5.5V) represent electrical deviations from the primary part. These parts are suitable only when inventory of MFR Recommended substitutes is unavailable and design margins accommodate the specified parameter differences.

Frequently Asked Questions (FAQ)

Q: Can AP7361-15E-13 directly replace MIC37100-1.5WS-TR in production?

A: Yes. Both parts deliver 1.5V fixed output at 1A in SOT-223-3 packaging with identical mechanical compatibility. Electrical parameters are equivalent within specified tolerances. The primary difference is dropout voltage (0.7V vs. 0.5V), which is acceptable in most applications with adequate input voltage margin.

Q: What is the difference between AP7361-15E-13 and AP7361-15ER-13?

A: Both parts are functionally identical with 1.5V output and 1A current rating. The primary distinction is packaging: AP7361-15E-13 uses standard SOT-223-3, while AP7361-15ER-13 uses SOT-223-R variant. AP7361-15ER-13 has substantially higher inventory availability (82,700 pcs vs. 2,700 pcs).

Q: Why is LT1963AEST-1.5#TRPBF listed as a substitute if it has 1.5A output instead of 1A?

A: Higher output current rating is a compatible parameter deviation. The LT1963AEST-1.5#TRPBF can supply 1A without exceeding its specifications. The 1.5A rating provides additional design margin and is not a limiting factor for substitution. This part is suitable when enhanced performance is beneficial.

Q: Are TLV1117LV15DCYR and TLV1117LV15DCYT suitable for new designs?

A: Both parts carry Last Time Buy product status, indicating discontinued or end-of-life classification. These parts are not recommended for new designs. Use MFR Recommended substitutes (AP7361 or LT1963 series) for new product development.

Q: What is the impact of different operating temperature ranges?

A: MIC37100-1.5WS-TR operates from -40°C to 125°C. AP7361 variants operate from -40°C to 85°C, representing a 40°C reduction in maximum temperature. Designs operating above 85°C require LT1963AEST or TLV1117 variants, which maintain the full -40°C to 125°C range. Verify application temperature requirements before substitution.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of MIC37100-1.5WS-TR. No regulatory or environmental qualification changes are required for substitution.

Q: What packaging options are available for tape and reel applications?

A: MIC37100-1.5WS-TR, AP7361-15E-13, AP7361-15ER-13, LT1963AEST-1.5#TRPBF, TLV1117LV15DCYR, and TLV1117LV15DCYT are all available in Tape & Reel packaging. LT1963AEST-1.5#PBF is supplied in Tube packaging and is not suitable for automated assembly processes requiring tape and reel format.

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