MIC37502BU TR Equivalent & Substitute Parts

Part Overview

The MIC37502BU TR is a linear voltage regulator IC from Microchip Technology designed for positive adjustable output applications. This Surface Mount device delivers 5A output current in a TO-263-5 package configuration. The part is classified as Obsolete, which necessitates identification of active equivalent alternatives to ensure design continuity and supply chain reliability. Obsolete status indicates discontinued manufacturing, making substitute parts critical for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Output Configuration	Positive
Output Type	Adjustable
Number of Regulators	1
Current - Output	5A
Voltage - Input (Max)	6V
Voltage - Output (Min/Fixed)	1.24V
Voltage - Output (Max)	5.5V
Voltage Dropout (Max)	0.5V @ 5A
Control Features	Enable
Protection Features	Over Current, Over Temperature, Reverse Polarity
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package	TO-263-5
Base Product Number	MIC37502
Moisture Sensitivity Level (MSL)	3 (168 Hours)

Substitute Part Grouping Explanation

Substitution of the MIC37502BU TR is determined by strict equivalence across the following critical parameters:

Output Configuration: Positive
Output Type: Adjustable
Current - Output: 5A
Voltage - Input (Max): 6V
Voltage - Output Range: 1.24V to 5.5V
Voltage Dropout (Max): 0.5V @ 5A
Control Features: Enable
Protection Features: Over Current, Over Temperature, Reverse Polarity
Operating Temperature: -40°C ~ 125°C
Package / Case: TO-263-5 compatible
Mounting Type: Surface Mount

The MIC37502WU-TR qualifies as a parametric equivalent substitute. Both parts share identical electrical specifications, thermal performance, protection mechanisms, and physical packaging. The primary distinction is product status: MIC37502BU TR is Obsolete, while MIC37502WU-TR is Active with current manufacturing availability.

Parameter Comparison

Parameter	MIC37502BU TR	MIC37502WU-TR	Match
Manufacturer	Microchip Technology	Microchip Technology	✓
Output Configuration	Positive	Positive	✓
Output Type	Adjustable	Adjustable	✓
Number of Regulators	1	1	✓
Current - Output	5A	5A	✓
Voltage - Input (Max)	6V	6V	✓
Voltage - Output (Min/Fixed)	1.24V	1.24V	✓
Voltage - Output (Max)	5.5V	5.5V	✓
Voltage Dropout (Max)	0.5V @ 5A	0.5V @ 5A	✓
Control Features	Enable	Enable	✓
Protection Features	Over Current, Over Temperature, Reverse Polarity	Over Current, Over Temperature, Reverse Polarity	✓
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	✓
Mounting Type	Surface Mount	Surface Mount	✓
Package / Case	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA	TO-263-6, D2PAK (5 Leads + Tab), TO-263BA	✓
Supplier Device Package	TO-263-5	TO-263-5	✓
Product Status	Obsolete	Active	Different
RoHS Status	RoHS non-compliant	ROHS3 Compliant	Different

Engineering Selection Recommendations

The MIC37502WU-TR is the direct active equivalent for the obsolete MIC37502BU TR. Selection of MIC37502WU-TR is supported by:

Complete parametric equivalence across all electrical, thermal, and protection specifications
Active product status with current manufacturing and supply availability
ROHS3 compliance, meeting modern regulatory requirements for new designs and production
Identical package configuration and pinout, enabling direct PCB-level substitution
Same base product number (MIC37502) confirming design lineage and functional compatibility

The transition from MIC37502BU TR to MIC37502WU-TR requires no circuit redesign, layout modification, or functional revalidation when electrical and thermal operating conditions remain within specified limits.

Frequently Asked Questions (FAQ)

Q: Can MIC37502WU-TR be used as a direct replacement for MIC37502BU TR?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The MIC37502WU-TR is the active production equivalent with current supply availability.

Q: What is the difference between MIC37502BU TR and MIC37502WU-TR?

A: The primary differences are product status and RoHS compliance. MIC37502BU TR is Obsolete and RoHS non-compliant. MIC37502WU-TR is Active and ROHS3 compliant. All electrical, thermal, and package specifications are identical.

Q: Are there any package or pinout differences?

A: No. Both parts use the TO-263-5 package configuration with identical pinout and mechanical dimensions. Direct PCB substitution is possible without layout changes.

Q: What is the MSL rating for both parts?

A: Both parts have MSL 3 with a 168-hour floor life requirement. Identical moisture sensitivity handling procedures apply to both.

Q: Why is MIC37502BU TR listed as Obsolete?

A: Obsolete status indicates the part has been discontinued by the manufacturer. MIC37502WU-TR is the active replacement manufactured under current production schedules.

Q: Are there any compliance differences I should consider?

A: MIC37502WU-TR is ROHS3 compliant, while MIC37502BU TR is RoHS non-compliant. For new designs or production requiring RoHS compliance, MIC37502WU-TR is the appropriate selection.

Q: Can I use inventory of MIC37502BU TR in new production?

A: Existing inventory of MIC37502BU TR can be used in applications where RoHS compliance is not required. For RoHS-compliant applications, transition to MIC37502WU-TR is necessary.

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