MIC37252BU Equivalent & Substitute Parts

Part Overview

The MIC37252BU is a linear voltage regulator IC from Microchip Technology designed for positive adjustable output applications. This Surface Mount device delivers 2.5A output current in a TO-263-5 package configuration. The part is currently classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. Substitute parts must maintain compatibility across output configuration, adjustability, package form factor, and thermal performance parameters.

Substiute Parts

MIC37252BU

Microchip TechnologyIn Stock: 8108MIC37252BU Datasheet

Current PartRFQ

MIC37252WU

Microchip TechnologyIn Stock: 1271MIC37252WU Datasheet

DirectRFQ

LT1764AMPQ#PBF

Analog Devices Inc.In Stock: 7046LT1764AMPQ#PBF Datasheet

MFR RecommendedRFQ

LT1764EQ#PBF

Analog Devices Inc.In Stock: 2184LT1764EQ#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC37252BU is determined by the following critical parameters:

Primary Compatibility Criteria:

• Output Configuration: Positive (required match)
• Output Type: Adjustable (required match)
• Number of Regulators: 1 (required match)
• Mounting Type: Surface Mount (required match)
• Package / Case: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA (required match)
• Control Features: Enable (required match)
• Protection Features: Over Current, Over Temperature, Reverse Polarity (required match)

Secondary Performance Criteria:

• Current - Output: Minimum 2.5A (equal or greater acceptable)
• Voltage - Input (Max): Minimum 6V (equal or greater acceptable)
• Voltage - Output Range: Must encompass 1.24V to 5.5V
• Operating Temperature: Must cover -40°C to 125°C minimum
• Voltage Dropout: Lower values acceptable for improved performance

Substitute parts MIC37252WU, LT1764AMPQ#PBF, and LT1764EQ#PBF satisfy all primary compatibility criteria and meet or exceed secondary performance specifications.

Parameter Comparison

Engineering Selection Recommendations

MIC37252WU represents the direct functional equivalent from Microchip Technology. This part maintains identical electrical specifications and package configuration as the obsolete MIC37252BU while offering Active product status. The MIC37252WU achieves ROHS3 compliance and is available in Tube packaging. Selection of this substitute eliminates obsolescence risk while preserving design compatibility.

LT1764AMPQ#PBF and LT1764EQ#PBF are manufacturer-recommended alternatives from Analog Devices Inc. Both parts exceed the performance envelope of the MIC37252BU across multiple parameters: increased maximum input voltage (20V vs. 6V), higher output current capability (3A vs. 2.5A), improved voltage dropout characteristics (0.66V @ 3A vs. 1V @ 2.5A), and lower moisture sensitivity (MSL 1 vs. MSL 3). Both achieve ROHS3 compliance and Active product status. The LT1764AMPQ#PBF supports extended operating temperature range (-55°C to 125°C), while LT1764EQ#PBF maintains the -40°C to 125°C specification matching the original part.

All three substitute parts maintain identical output configuration, adjustability, control features, protection features, and package form factor. Selection between substitutes depends on application requirements for input voltage range, output current headroom, and environmental operating conditions.

Frequently Asked Questions (FAQ)

Q: Can MIC37252WU be used as a direct replacement for MIC37252BU?

A: Yes. MIC37252WU is functionally equivalent across all electrical and mechanical parameters. Both parts share identical output configuration (Positive Adjustable), current rating (2.5A), voltage specifications (1.24V to 5.5V output), dropout characteristics (1V @ 2.5A), and TO-263-5 package configuration. The primary difference is product status: MIC37252WU is Active while MIC37252BU is Obsolete.

Q: What are the key differences between MIC37252BU and the LT1764 series?

A: The LT1764AMPQ#PBF and LT1764EQ#PBF offer enhanced performance specifications: maximum input voltage increases from 6V to 20V, output current increases from 2.5A to 3A, and voltage dropout improves to 0.66V @ 3A. Both LT1764 variants maintain the same output adjustability range (1.21V to 20V output), Enable control feature, and identical protection features. Package form factor remains TO-263-6 D2PAK configuration.

Q: Are there compliance differences between substitute options?

A: MIC37252BU is RoHS non-compliant. All three substitute parts (MIC37252WU, LT1764AMPQ#PBF, LT1764EQ#PBF) achieve ROHS3 compliance. Moisture sensitivity differs: MIC37252BU and MIC37252WU specify MSL 3 (168 Hours), while both LT1764 variants specify MSL 1 (Unlimited), indicating superior moisture resistance.

Q: Which substitute should be selected for applications requiring higher input voltage?

A: LT1764AMPQ#PBF or LT1764EQ#PBF are required for applications exceeding 6V input. Both parts support maximum input voltage of 20V, compared to 6V for MIC37252BU and MIC37252WU. If the application input voltage remains below 6V, MIC37252WU provides the most direct substitution path.

Q: Are the TO-263-5 and DDPAK-5 packages pin-compatible?

A: Both MIC37252BU/MIC37252WU (TO-263-5) and LT1764 variants (DDPAK-5) share the same physical package classification: TO-263-6, D2PAK (5 Leads + Tab), TO-263BA. Pin compatibility is maintained across all four parts for this application category.

Q: What is the impact of lower voltage dropout in LT1764 variants?

A: LT1764AMPQ#PBF and LT1764EQ#PBF exhibit 0.66V dropout at 3A compared to 1V dropout at 2.5A for MIC37252BU. Lower dropout voltage reduces power dissipation and thermal stress, enabling operation with lower input voltage margins or higher output current delivery within the same thermal budget.