MIC39300-1.8BT Equivalent & Substitute Parts

Part Overview

The MIC39300-1.8BT is a linear voltage regulator IC from Microchip Technology designed to deliver a fixed 1.8V output at 3A in a TO-220-3 package. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The device provides positive fixed output regulation with integrated protection features including over-current, over-temperature, and reverse polarity protection, suitable for applications requiring stable 1.8V power delivery in through-hole mounting configurations.

Substiute Parts

MIC39300-1.8BT

Microchip TechnologyIn Stock: 923MIC39300-1.8BT Datasheet

Current PartRFQ

MIC39300-1.8WT

Microchip TechnologyIn Stock: 17223MIC39300-1.8WT Datasheet

DirectRFQ

TLV2217-18KCS

Texas InstrumentsIn Stock: 1932TLV2217-18KCS Datasheet

MFR RecommendedRFQ

TLV2217-18KCSE3

Texas InstrumentsIn Stock: 1501TLV2217-18KCSE3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC39300-1.8BT are identified based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

• Output voltage: 1.8V fixed
• Package type: TO-220-3
• Mounting type: Through hole
• Output configuration: Positive fixed regulation
• Protection features: Over-current and over-temperature protection

Substitution Categories:

Direct Equivalent (Same Manufacturer): MIC39300-1.8WT maintains identical electrical specifications (3A output current, 0.55V dropout at 3A, 16V maximum input) and package configuration. The primary difference is product status (active vs. obsolete) and packaging format (tube vs. unspecified for original part).

Cross-Manufacturer Alternatives: TLV2217-18KCS and TLV2217-18KCSE3 from Texas Instruments provide 1.8V fixed output in TO-220-3 packages with identical mounting and protection feature sets. These parts operate within the same temperature range and share the same output voltage specification. However, output current capability is reduced to 500mA, and maximum input voltage is limited to 12V compared to the 16V specification of the MIC39300-1.8BT.

Parameter Comparison

Engineering Selection Recommendations

MIC39300-1.8WT is the primary substitute for direct replacement in applications requiring 3A output current. This part is manufactured by the same supplier, maintains identical electrical specifications and package configuration, and carries active product status with ROHS3 compliance. Selection of this part eliminates obsolescence risk while preserving all functional and thermal characteristics of the original design.

TLV2217-18KCS and TLV2217-18KCSE3 are suitable alternatives only for applications where output current requirements do not exceed 500mA. Both parts are active products with ROHS3 compliance and provide the same 1.8V fixed output in TO-220-3 packages. The reduced maximum input voltage (12V vs. 16V) and lower operating temperature minimum (0°C vs. -40°C) must be evaluated against specific application requirements. TLV2217-18KCSE3 includes moisture sensitivity level specification (1 - Unlimited), while TLV2217-18KCS does not specify MSL.

Frequently Asked Questions (FAQ)

Q: Can TLV2217-18KCS or TLV2217-18KCSE3 be used as direct replacements for MIC39300-1.8BT?

A: These Texas Instruments parts are functionally compatible only in applications where output current does not exceed 500mA. The MIC39300-1.8BT is rated for 3A output, while the TLV2217 series is limited to 500mA. Additionally, the maximum input voltage for TLV2217 parts is 12V compared to 16V for the MIC39300-1.8BT. Verify your application's current and input voltage requirements before substitution.

Q: What is the difference between MIC39300-1.8BT and MIC39300-1.8WT?

A: Both parts are manufactured by Microchip Technology and share identical electrical specifications, output current (3A), input voltage rating (16V), and package configuration (TO-220-3). The primary differences are product status (obsolete vs. active) and packaging format (tube for the -1.8WT variant). The MIC39300-1.8WT also carries ROHS3 compliance, while the original part is RoHS non-compliant.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. MIC39300-1.8WT, TLV2217-18KCS, and TLV2217-18KCSE3 are all supplied in TO-220-3 packages with through-hole mounting. This ensures mechanical and thermal interface compatibility with existing PCB designs.

Q: What protection features do these regulators provide?

A: MIC39300-1.8BT and MIC39300-1.8WT include over-current, over-temperature, and reverse polarity protection. TLV2217-18KCS and TLV2217-18KCSE3 provide over-current, over-temperature, and over-voltage protection. All parts include thermal shutdown capability.

Q: Which substitute part should I select for new designs?

A: For applications requiring 3A output current, select MIC39300-1.8WT. This part maintains full electrical compatibility with the original specification and carries active product status with current compliance certifications. For applications with lower current requirements (≤500mA), TLV2217-18KCS or TLV2217-18KCSE3 are viable alternatives from an established supplier.