MIC5259-1.8BD5-TR Equivalent & Substitute Parts

Part Overview

The MIC5259-1.8BD5-TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.8V output at 300mA in a TSOT-23-5 surface mount package. This part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility for existing designs or new production requirements.

Substiute Parts

MIC5259-1.8BD5-TR

Microchip TechnologyIn Stock: 763MIC5259-1.8BD5-TR Datasheet

Current PartRFQ

MIC5259-1.8YD5-TR

Microchip TechnologyIn Stock: 6836MIC5259-1.8YD5-TR Datasheet

DirectRFQ

TC2014-1.8VCTTR

Microchip TechnologyIn Stock: 1744TC2014-1.8VCTTR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MIC5259-1.8BD5-TR is determined by the following critical parameters:

• Output voltage fixed at 1.8V
• Output current capability of 300mA or greater
• Maximum input voltage of 6V or higher
• TSOT-23-5 or compatible SOT-23-5 package footprint
• Operating temperature range of -40°C to 125°C or wider
• Enable control feature
• Over current and over temperature protection

Parts meeting these criteria can function as direct replacements in the same circuit topology without design modification.

Parameter Comparison

Engineering Selection Recommendations

MIC5259-1.8YD5-TR is the primary equivalent substitute. It maintains identical electrical specifications and package configuration as the MIC5259-1.8BD5-TR while offering active product status and ROHS3 compliance. This part is recommended for direct replacement in new designs and production restocking.

TC2014-1.8VCTTR is a secondary alternative suitable only for applications where output current requirements do not exceed 50mA. This part provides lower quiescent current (80 µA versus 150 µA) and reduced dropout voltage at its rated current, making it advantageous for low-power applications. However, it cannot support the full 300mA output current of the original specification and requires circuit validation before implementation.

Frequently Asked Questions (FAQ)

Q: Can MIC5259-1.8YD5-TR be used as a direct drop-in replacement for MIC5259-1.8BD5-TR?

A: Yes. Both parts share identical electrical specifications, output current rating, package type, and control/protection features. The primary difference is product status and RoHS compliance. No circuit modification is required.

Q: Is TC2014-1.8VCTTR compatible with designs requiring 300mA output?

A: No. TC2014-1.8VCTTR is rated for 50mA maximum output current. It cannot supply 300mA and will not function as a direct replacement in circuits designed for the full 300mA specification. Use only in applications where load current does not exceed 50mA.

Q: Are there package compatibility concerns between TSOT-23-5 and SOT-23-5?

A: Both designations refer to the same physical footprint (SC-74A). PCB layout compatibility is maintained. Verify with component datasheets for any minor dimensional variations specific to your assembly process.

Q: What is the significance of RoHS compliance status?

A: MIC5259-1.8BD5-TR is RoHS non-compliant, while MIC5259-1.8YD5-TR and TC2014-1.8VCTTR are ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, use compliant alternatives.

Q: Can I use TC2014-1.8VCTTR in a design originally specified for MIC5259-1.8BD5-TR?

A: Only if your application load current is confirmed to be 50mA or less. If there is any possibility of exceeding 50mA, use MIC5259-1.8YD5-TR instead. Exceeding the TC2014 current rating will cause device failure.