MIC5239-2.5YS-TR Equivalent & Substitute Parts

Part Overview

The MIC5239-2.5YS-TR is a linear voltage regulator IC manufactured by Microchip Technology, designed to provide a fixed 2.5V output with 500mA current capacity in a surface-mount SOT-223-3 package. This device is classified as a positive fixed output regulator with integrated protection features including over-current, over-temperature, over-voltage, and reverse polarity protection. The part is currently in active production status with RoHS3 compliance and REACH unaffected classification.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this product category.

Substiute Parts

MIC5239-2.5YS-TR

Microchip TechnologyIn Stock: 1140MIC5239-2.5YS-TR Datasheet

Current PartRFQ

MCP1804T-2502I/DB

Microchip TechnologyIn Stock: 5476MCP1804T-2502I/DB Datasheet

MFR RecommendedRFQ

LM2937IMP-2.5/NOPB

Texas InstrumentsIn Stock: 1372LM2937IMP-2.5/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC5239-2.5YS-TR are identified based on the following electrical and mechanical criteria:

• Fixed output voltage of 2.5V
• Surface-mount package compatibility (SOT-223 family)
• Output current capability of 100mA or greater
• Input voltage maximum rating of 26V or higher
• Operating temperature range of -40°C or lower to 85°C or higher
• RoHS3 compliance and REACH unaffected status
• Protection features including over-current and over-temperature

Two substitute parts meet these criteria with documented electrical equivalence within acceptable parameter tolerances.

Parameter Comparison

Engineering Selection Recommendations

MCP1804T-2502I/DB is suitable for applications requiring reduced output current (100mA maximum). This substitute maintains the same fixed 2.5V output and SOT-223-3 package footprint. The lower quiescent current (105 µA) and improved moisture sensitivity level (MSL 1) provide advantages in low-power applications. However, the maximum output current is limited to 100mA compared to the original 500mA specification, restricting its use to lower-current designs.

LM2937IMP-2.5/NOPB provides full 500mA output current capability matching the original part. This Texas Instruments device maintains the 2.5V fixed output and surface-mount form factor. The lower quiescent current (10 mA) and MSL 1 rating offer improved performance characteristics. The SOT-223-4 package requires verification of PCB layout compatibility, as it differs from the SOT-223-3 footprint of the original part. Input voltage maximum is 26V, which is lower than the original 30V specification.

Both substitute parts maintain RoHS3 compliance and REACH unaffected status. Selection between substitutes depends on output current requirements and package footprint constraints of the target application.

Frequently Asked Questions (FAQ)

Q: Can MCP1804T-2502I/DB replace MIC5239-2.5YS-TR in all applications?

A: MCP1804T-2502I/DB is suitable only for applications requiring 100mA or less output current. Applications requiring the full 500mA output current of the original part require LM2937IMP-2.5/NOPB or continued use of MIC5239-2.5YS-TR.

Q: What is the difference between SOT-223-3 and SOT-223-4 packages?

A: SOT-223-3 contains three leads (input, output, ground), while SOT-223-4 contains four leads. PCB layout and footprint designs are not interchangeable without modification. Verify schematic and layout compatibility before selecting LM2937IMP-2.5/NOPB.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. MIC5239-2.5YS-TR, MCP1804T-2502I/DB, and LM2937IMP-2.5/NOPB are all ROHS3 compliant and REACH unaffected.

Q: What is the significance of MSL rating differences?

A: MSL 3 (168 Hours) for MIC5239-2.5YS-TR indicates moisture sensitivity requiring controlled storage and handling. MSL 1 (Unlimited) for both substitute parts indicates no moisture sensitivity restrictions, providing greater flexibility in storage and manufacturing environments.

Q: Which substitute part has the lowest dropout voltage?

A: MIC5239-2.5YS-TR has the lowest dropout voltage at 0.35V @ 500mA. LM2937IMP-2.5/NOPB provides 1V @ 500mA, and MCP1804T-2502I/DB provides 1.9V @ 100mA.

Q: Can I use LM2937IMP-2.5/NOPB with a 30V input supply?

A: No. LM2937IMP-2.5/NOPB has a maximum input voltage rating of 26V. Applications requiring 30V input capability must use MIC5239-2.5YS-TR or verify that the actual input voltage does not exceed 26V.