MIC39100-1.8WS-TR Equivalent & Substitute Parts

Part Overview

The MIC39100-1.8WS-TR is a linear voltage regulator IC from Microchip Technology designed for positive fixed 1.8V output applications. This Surface Mount device operates across an input voltage range up to 16V and delivers 1A output current in a compact SOT-223-3 package. The regulator includes integrated protection features for over-current, over-temperature, and reverse polarity conditions, with an operating temperature range of -40°C to 125°C. As an active product with ROHS3 compliance and REACH unaffected status, substitute parts may be required for specific application constraints, inventory availability, or performance optimization within compatible electrical and mechanical parameters.

Substiute Parts

MIC39100-1.8WS-TR

Microchip TechnologyIn Stock: 2200MIC39100-1.8WS-TR Datasheet

Current PartRFQ

MCP1703-1802E/DB

Microchip TechnologyIn Stock: 1563MCP1703-1802E/DB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MIC39100-1.8WS-TR are qualified based on the following critical parameters that determine functional compatibility:

Electrical Compatibility Criteria:

• Fixed output voltage of 1.8V
• Input voltage maximum rating of 16V or greater
• Surface Mount packaging in SOT-223-3 case
• Operating temperature range of -40°C to 125°C or wider
• Positive output configuration with fixed output type
• Single regulator configuration
• ROHS3 compliance and REACH unaffected status

Current Output Consideration: The MIC39100-1.8WS-TR delivers 1A output current. Substitute parts with lower output current ratings (such as 200mA) are classified as functional substitutes only when the application circuit requires less than the substitute's maximum current specification. The substitute must maintain all other electrical and mechanical parameters within the specified ranges.

Parameter Comparison

Engineering Selection Recommendations

Both the MIC39100-1.8WS-TR and MCP1703-1802E/DB are active products from Microchip Technology with ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current manufacturing and deployment.

The MIC39100-1.8WS-TR is the primary selection for applications requiring 1A output current capacity. The MCP1703-1802E/DB serves as a functional substitute for applications with output current requirements not exceeding 200mA, provided all other electrical parameters remain within specification. Both devices share identical fixed output voltage (1.8V), maximum input voltage (16V), operating temperature range (-40°C to 125°C), and SOT-223-3 package configuration.

Selection between these parts depends solely on the application's maximum output current requirement and the availability of inventory in the required packaging format (Cut Tape with Digi-Reel versus Tube).

Frequently Asked Questions (FAQ)

Q: Can the MCP1703-1802E/DB replace the MIC39100-1.8WS-TR in all applications?

A: The MCP1703-1802E/DB is a functional substitute only when the application circuit draws 200mA or less from the 1.8V output. If the circuit requires more than 200mA, the MIC39100-1.8WS-TR must be used. Both devices are electrically and mechanically compatible in SOT-223-3 package form.

Q: Are there differences in protection features between these parts?

A: Both devices include over-current and over-temperature protection. The MIC39100-1.8WS-TR includes reverse polarity protection, while the MCP1703-1802E/DB includes short-circuit protection. Application-specific requirements may determine which protection feature set is necessary.

Q: Do these parts have different moisture sensitivity levels?

A: Yes. The MIC39100-1.8WS-TR has MSL 3 (168 Hours), while the MCP1703-1802E/DB has MSL 1 (Unlimited). The MCP1703-1802E/DB offers superior moisture resistance for storage and handling in humid environments.

Q: What is the voltage dropout difference between these regulators?

A: The MIC39100-1.8WS-TR specifies 0.63V dropout at 1A. The MCP1703-1802E/DB dropout specification is not provided in the available data. Dropout performance should be evaluated against specific application input voltage and load current requirements.

Q: Are both parts available in the same packaging options?

A: Both devices use the SOT-223-3 case. The MIC39100-1.8WS-TR is supplied in Cut Tape with Digi-Reel packaging, while the MCP1703-1802E/DB is supplied in Tube packaging. Packaging selection depends on assembly process requirements and inventory management practices.