MIC5259-3.3YD5-TR Equivalent & Substitute Parts

Part Overview

The MIC5259-3.3YD5-TR is a linear voltage regulator IC from Microchip Technology, classified as a Power Management (PMIC) component. This positive fixed output regulator delivers 300mA at 3.3V with a maximum dropout voltage of 0.55V at rated current. The device operates across the industrial temperature range of -40°C to 125°C and includes integrated protection features for over-current, over-temperature, and under-voltage lockout conditions. Product status is Active with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are identified based on matching output voltage (3.3V fixed), compatible packaging (SOT-23-5 / TSOT-23-5), surface mount mounting type, and overlapping current output ratings. Substitutes are selected where electrical parameters remain within acceptable operating margins for the application.

Substiute Parts

MIC5259-3.3YD5-TR

Microchip TechnologyIn Stock: 9904MIC5259-3.3YD5-TR Datasheet

Current PartRFQ

TC1054-3.3VCT713

Microchip TechnologyIn Stock: 5212TC1054-3.3VCT713 Datasheet

MFR RecommendedRFQ

TC2014-3.3VCTTR

Microchip TechnologyIn Stock: 1427TC2014-3.3VCTTR Datasheet

MFR RecommendedRFQ

TC2015-3.3VCTTR

Microchip TechnologyIn Stock: 4383TC2015-3.3VCTTR Datasheet

MFR RecommendedRFQ

TC2185-3.3VCTTR

Microchip TechnologyIn Stock: 19341TC2185-3.3VCTTR Datasheet

MFR RecommendedRFQ

TPS79933DDCR

Texas InstrumentsIn Stock: 24902TPS79933DDCR Datasheet

MFR RecommendedRFQ

TPS79933DDCT

Texas InstrumentsIn Stock: 4303TPS79933DDCT Datasheet

MFR RecommendedRFQ

ADP122AUJZ-3.3-R7

Analog Devices Inc.In Stock: 27721ADP122AUJZ-3.3-R7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic is based on the following criteria:

Primary Substitution Criteria:

• Fixed output voltage of 3.3V
• Surface mount packaging compatible with SOT-23-5 / TSOT-23-5 footprint
• Operating temperature range of -40°C to 125°C
• Active product status
• RoHS3 compliance

Secondary Compatibility Factors:

• Current output rating (300mA primary; 50mA to 200mA acceptable for lower-current applications)
• Maximum input voltage (5.5V to 6.5V acceptable range)
• Dropout voltage performance
• Protection feature set (over-current, over-temperature, UVLO preferred)

Substitute parts are grouped by current output capacity. Parts with lower current ratings (50mA, 100mA, 150mA, 200mA) are suitable for applications requiring less than their rated output current. Parts with 200mA or higher ratings are suitable for direct replacement in 300mA applications where dropout voltage and quiescent current performance are acceptable.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (300mA Output): The ADP122AUJZ-3.3-R7 from Analog Devices Inc. is a parametric equivalent suitable for direct replacement of the MIC5259-3.3YD5-TR. Both devices deliver 300mA output current, operate across -40°C to 125°C, feature TSOT-23-5 packaging, and include over-current, over-temperature, and UVLO protection. The ADP122 exhibits superior dropout voltage performance (0.15V vs. 0.55V at 300mA) and lower quiescent current (105 µA vs. 150 µA), making it advantageous for battery-powered applications. Both parts maintain RoHS3 compliance and MSL 1 rating.

Partial Replacement (200mA Output): The TPS79933DDCR and TPS79933DDCT from Texas Instruments are suitable substitutes for applications requiring up to 200mA output current. These devices feature improved dropout voltage (0.16V @ 200mA), lower quiescent current (60 µA), and enhanced PSRR performance (70dB ~ 38dB across 100Hz ~ 100kHz). Both include reverse polarity protection in addition to standard protection features. Maximum input voltage tolerance is 6.5V. Both maintain RoHS3 compliance and MSL 1 rating.

Lower Current Applications (50mA to 150mA): Microchip Technology offers a series of lower-current alternatives: TC1054-3.3VCT713 (50mA), TC2014-3.3VCTTR (50mA), TC2015-3.3VCTTR (100mA), and TC2185-3.3VCTTR (150mA). These devices are suitable for applications where output current requirements do not exceed their rated values. All maintain the 3.3V fixed output, -40°C to 125°C operating range, SOT-23-5 packaging, and RoHS3 compliance. Quiescent current is consistently lower (80 µA) across this series compared to the MIC5259. Protection features include over-current and over-temperature; UVLO is not included in these lower-current variants.

Selection Basis: All recommended substitutes maintain Active product status, RoHS3 compliance, and MSL 1 moisture sensitivity rating. Packaging compatibility (SOT-23-5 / TSOT-23-5) ensures mechanical and electrical footprint alignment. Selection should be based on specific application current requirements and dropout voltage constraints.

Frequently Asked Questions (FAQ)

Q: Can the ADP122AUJZ-3.3-R7 be used as a direct replacement for the MIC5259-3.3YD5-TR?

A: Yes. Both devices deliver 300mA output at 3.3V, operate across -40°C to 125°C, use TSOT-23-5 packaging, and include over-current, over-temperature, and UVLO protection. The ADP122 offers superior dropout voltage performance (0.15V vs. 0.55V at 300mA), making it suitable for direct substitution. Verify input voltage compatibility with your application (ADP122 maximum is 5.5V; MIC5259 maximum is 6V).

Q: Are the Texas Instruments TPS79933 variants suitable for 300mA applications?

A: The TPS79933DDCR and TPS79933DDCT are rated for 200mA output current. They are suitable for applications requiring up to 200mA. For applications requiring the full 300mA output of the MIC5259, these parts are not recommended as primary replacements. However, they may be used in 200mA-limited applications where their superior dropout voltage (0.16V) and lower quiescent current (60 µA) provide system benefits.

Q: What is the difference between TC1054-3.3VCT713 and TC2014-3.3VCTTR?

A: Both devices are 50mA regulators with 3.3V fixed output and SOT-23-5 packaging. The TC2014 exhibits lower dropout voltage (0.07V vs. 0.12V at 50mA) and slightly lower PSRR (55dB vs. 64dB at 1kHz). Selection depends on application sensitivity to dropout voltage performance. Both maintain identical quiescent current (80 µA) and protection features.

Q: Can lower-current parts (50mA, 100mA, 150mA) replace the 300mA MIC5259?

A: Lower-current parts are suitable only for applications where actual output current demand does not exceed their rated values. The TC1054 (50mA), TC2014 (50mA), TC2015 (100mA), and TC2185 (150mA) maintain 3.3V output and compatible packaging but lack UVLO protection present in the MIC5259. Use these parts only when application current requirements are confirmed below their rated limits.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain RoHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the MIC5259-3.3YD5-TR compliance profile.

Q: What is the packaging difference between TSOT-23-5 and SOT-23-5?

A: TSOT-23-5 (Thin SOT-23-5) and SOT-23-5 refer to the same footprint and pin configuration. Both are surface mount packages with identical mechanical dimensions and electrical connectivity. The designation difference reflects manufacturer nomenclature; parts are mechanically and electrically interchangeable on the PCB.

Q: Which substitute offers the best dropout voltage performance?

A: The ADP122AUJZ-3.3-R7 provides the lowest dropout voltage at 300mA output (0.15V), followed by the TPS79933 variants at 200mA output (0.16V). For applications sensitive to dropout voltage, the ADP122 is the optimal choice among 300mA-rated alternatives.