MIC5239-2.5BS TR Linear Voltage Regulator Equivalent & Substitute Parts

Part Overview

The MIC5239-2.5BS TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 2.5V output applications with 500mA current capacity in SOT-223-3 surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The MIC5239-2.5BS TR provides essential power management functionality with integrated protection features including over-current, over-temperature, over-voltage, and reverse polarity protection across an operating temperature range of -40°C to 125°C.

Substiute Parts

MIC5239-2.5BS TR

Microchip TechnologyIn Stock: 1140MIC5239-2.5BS TR Datasheet

Current PartRFQ

MIC5239-2.5YS-TR

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

DirectRFQ

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

LM2937IMPX-2.5/NOPB

Texas InstrumentsIn Stock: 8225LM2937IMPX-2.5/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC5239-2.5BS TR is determined by the following critical parameters: fixed output voltage of 2.5V, output current capability of 500mA or greater, maximum input voltage of 26V or higher, SOT-223 package compatibility, surface mount mounting type, and operating temperature range of -40°C to 85°C minimum. Parts meeting these electrical and mechanical specifications can function as direct replacements in circuit applications designed for the MIC5239-2.5BS TR.

The substitute parts identified are grouped into two categories: direct Microchip Technology equivalents and cross-manufacturer alternatives from Texas Instruments. The MIC5239-2.5YS-TR represents the active production equivalent within the Microchip product line. The MCP1804T-2502I/DB, while meeting voltage and package requirements, operates at reduced current capacity (100mA) and therefore functions as a substitute only in applications requiring lower output current. The LM2937IMP-2.5/NOPB and LM2937IMPX-2.5/NOPB from Texas Instruments provide full 500mA current capability with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The MIC5239-2.5YS-TR is the primary recommended substitute, offering identical electrical specifications and full compatibility with the obsolete MIC5239-2.5BS TR. Both parts share the same output voltage, current rating, dropout voltage, and quiescent current characteristics. The MIC5239-2.5YS-TR maintains active product status and ROHS3 compliance, making it suitable for new designs and production continuity.

The LM2937IMPX-2.5/NOPB and LM2937IMP-2.5/NOPB from Texas Instruments provide functionally equivalent alternatives with full 500mA output current capability and active product status. These parts feature ROHS3 compliance and meet the electrical requirements of the original specification. The primary consideration is the SOT-223-4 package variant, which includes an additional pin compared to the SOT-223-3 original package.

The MCP1804T-2502I/DB is suitable only for applications where output current requirements do not exceed 100mA, as this part provides reduced current capacity compared to the original 500mA specification. This part maintains ROHS3 compliance and active product status.

All substitute parts listed carry ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements for electronic components.

Frequently Asked Questions (FAQ)

Q: Can the MIC5239-2.5YS-TR be used as a direct replacement for the MIC5239-2.5BS TR?

A: Yes. The MIC5239-2.5YS-TR provides identical electrical specifications including 2.5V output voltage, 500mA output current, 0.35V typical dropout voltage at 500mA, and 45 µA quiescent current. Both parts use SOT-223-3 packaging and support the same operating temperature range. The primary difference is product status: MIC5239-2.5YS-TR is active production while MIC5239-2.5BS TR is obsolete.

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

A: SOT-223-3 contains three pins (input, output, ground), while SOT-223-4 contains four pins with an additional ground pin. The LM2937 series uses SOT-223-4 packaging. PCB layout modifications are required when transitioning between these package types, as pin configurations differ.

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

A: The MCP1804T-2502I/DB is suitable only for applications requiring output current of 100mA or less. The original MIC5239-2.5BS TR supports 500mA output current. Applications requiring the full 500mA specification must use MIC5239-2.5YS-TR, LM2937IMP-2.5/NOPB, or LM2937IMPX-2.5/NOPB.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed (MIC5239-2.5YS-TR, MCP1804T-2502I/DB, LM2937IMP-2.5/NOPB, and LM2937IMPX-2.5/NOPB) carry ROHS3 compliance certification. The original MIC5239-2.5BS TR is RoHS non-compliant.

Q: What is the difference between LM2937IMP-2.5/NOPB and LM2937IMPX-2.5/NOPB?

A: Both parts provide identical electrical specifications and SOT-223-4 packaging. The primary difference is packaging format: LM2937IMP-2.5/NOPB is supplied in Cut Tape (CT) and Digi-Reel format, while LM2937IMPX-2.5/NOPB is supplied in Tape & Reel (TR) format. Selection depends on procurement and assembly requirements.

Q: What protection features are provided by the substitute parts?

A: MIC5239-2.5YS-TR and LM2937 series provide over-current, over-temperature, and short-circuit protection. LM2937 series additionally includes mirror-image insertion protection and transient voltage protection. MCP1804T-2502I/DB provides over-current and over-temperature protection.