MIC5237-3.3YU-TR Equivalent & Substitute Parts Reference

Part Overview

MIC5237-3.3YU-TR is a linear voltage regulator IC from Microchip Technology, classified under the Power Management (PMIC) product category. It features a fixed 3.3V positive output configuration with a maximum output current of 500mA, designed for surface-mount applications using a TO-263-3 package. The device is RoHS3 compliant and is actively available with 702 units in stock.

Identifying equivalent and substitute linear voltage regulators is necessary for maintaining continuity in production, managing inventory risks, and supporting second-source strategies. Substitute parts must match critical electrical and mechanical parameters to ensure seamless integration into existing designs.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Package / Case	Output Configuration	Output Type	Number of Regulators	Voltage - Input (Max)	Voltage - Output (Min/Fixed)	Voltage Dropout (Max)	Current - Output	Protection Features	Operating Temperature	Mounting Type	RoHS Status	MSL
MIC5237-3.3YU-TR	Microchip Technology	Power Management (PMIC)	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA	Positive	Fixed	1	16V	3.3V	0.7V @ 500mA	500mA	Over Current, Over Temperature, Reverse Polarity	-40°C ~ 125°C	Surface Mount	ROHS3 Compliant	3 (168 Hours)

Substitute Part Grouping Explanation

Substitute linear voltage regulator ICs must share the following key parameters:

Output configuration (positive)
Output type (fixed)
Number of regulators (1)
Voltage output (fixed at 3.3V)
Package/case compatibility (TO-263 variants)
Mounting type (surface mount)
Output current rating (≥500mA)
Maximum input voltage (comparable or higher, unless otherwise specified in the substitute)
Voltage dropout at rated output (comparable)
Protection features (matching or exceeding original part)
Operating temperature range (−40°C to 125°C)
RoHS compliance and moisture sensitivity level (MSL 3)

These criteria ensure form, fit, and functional equivalence in power management applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Package / Case	Output Configuration	Output Type	Number of Regulators	Voltage - Input (Max)	Voltage - Output (Min/Fixed)	Voltage Dropout (Max)	Current - Output	Protection Features	Operating Temperature	Mounting Type	RoHS Status	MSL
MIC5237-3.3YU-TR	Microchip Technology	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA	Positive	Fixed	1	16V	3.3V	0.7V @ 500mA	500mA	Over Current, Over Temperature, Reverse Polarity	-40°C ~ 125°C	Surface Mount	ROHS3 Compliant	3 (168 Hours)
TC1262-3.3VEBTR	Microchip Technology	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA	Positive	Fixed	1	6V	3.3V	0.65V @ 500mA	500mA	Over Current, Over Temperature	-40°C ~ 125°C	Surface Mount	ROHS3 Compliant	3 (168 Hours)
LM2937ES-3.3/NOPB	Texas Instruments	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA	Positive	Fixed	1	26V	3.3V	1V @ 500mA	500mA	Mirror-Image Insertion, Over Temperature, Short Circuit, Transient Voltage	-40°C ~ 125°C (TJ)	Surface Mount	ROHS3 Compliant	3 (168 Hours)
LM2937ESX-3.3/NOPB	Texas Instruments	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA	Positive	Fixed	1	26V	3.3V	1V @ 500mA	500mA	Mirror-Image Insertion, Over Temperature, Short Circuit, Transient Voltage	-40°C ~ 125°C (TJ)	Surface Mount	ROHS3 Compliant	3 (168 Hours)
SPX3940T-L-3-3/TR	MaxLinear, Inc.	TO-263-4, D2PAK (3 Leads + Tab), TO-263AA	Positive	Fixed	1	16V	3.3V	0.55V @ 1A	1A	Over Current, Over Temperature, Reverse Polarity, Short Circuit, Transient Voltage	-40°C ~ 125°C	Surface Mount	ROHS3 Compliant	3 (168 Hours)

Engineering Selection Recommendations

All models listed are designated as "Active" product status and RoHS3 compliant, ensuring availability for production use.
All substitute parts share moisture sensitivity level 3 (168 Hours) and have not reached EOL; suitability for assembly processes is maintained.
All parts utilize the TO-263 (D2PAK) footprint and are compatible with surface-mount applications per input parameters.
Substitute parts meet or exceed 3.3V output regulation and 500mA output current specification.
Provided operating temperature ranges match the main part requirements.
Protection features specified in substitutes are supported as listed; compliance with regulatory and environmental standards is confirmed in the input.

Frequently Asked Questions (FAQ)

Q: What parameters determine compatibility for substituting MIC5237-3.3YU-TR?
A: Compatibility is determined strictly by output configuration, output type, regulator count, input/output voltage ratings, dropout voltage, current rating, package/case, mounting type, protection features, operating temperature, RoHS compliance, and moisture sensitivity level as specified.

Q: Are these substitute parts suitable for use in designs with the same PCB footprint?
A: All parts utilize the TO-263 (D2PAK) package as explicitly stated, which supports drop-in replacement on boards designed for this footprint.

Q: Do the substitute models provide equivalent reliability and environmental compliance?
A: All substitutes have an active product status, RoHS3 compliance, and identical moisture sensitivity level (MSL 3), ensuring compatibility with standard reliability and environmental protocols.

Q: How do protection features compare between substitute parts?
A: Substitute parts include specified combinations of over current, over temperature, reverse polarity, mirror-image insertion, short circuit, and transient voltage protection. Reference the table for exact feature mapping.

Q: What output current ratings are supported by substitutes?
A: Substitute parts meet or exceed the 500mA output rating, with SPX3940T-L-3-3/TR rated up to 1A as stated in the provided parameters.

Q: Is temperature range consistent across all parts?
A: Each part supports an operational temperature range of -40°C to 125°C per parameters given.

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