TC105303ECTTR Equivalent & Substitute Parts

Part Overview

The TC105303ECTTR is a Buck Regulator Positive Output Step-Down DC-DC Controller IC manufactured by Microchip Technology. This Surface Mount device operates as a Transistor Driver with a single output phase, designed for step-down voltage conversion applications. The part is currently Active in product status with 933 units available in inventory. Alternative models are identified to support supply chain flexibility, design redundancy, and procurement optimization when the primary part number becomes unavailable or when equivalent functionality is required across different packaging formats.

Substiute Parts

TC105303ECTTR

Microchip TechnologyIn Stock: 983TC105303ECTTR Datasheet

Current PartRFQ

TC105333ECTTR

Microchip TechnologyIn Stock: 1154TC105333ECTTR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The TC105333ECTTR is identified as a parametric equivalent to the TC105303ECTTR based on strict alignment of electrical and mechanical specifications. Both parts share identical functional characteristics across all critical parameters: buck regulator topology, positive output configuration, single-phase operation, 2.2V to 10V supply voltage range, 300kHz switching frequency, 100% maximum duty cycle, enable control feature, and identical operating temperature range of -40°C to 85°C.

The primary distinction between these parts is packaging format. The TC105303ECTTR is supplied in Tape & Reel (TR) format, while the TC105333ECTTR is available in Cut Tape (CT) and Digi-Reel® format. Both utilize the same physical package (SC-74A, SOT-753 / SOT-23-5), ensuring mechanical and electrical compatibility at the component level. Compliance certifications, including RoHS3, REACH, and moisture sensitivity ratings, are identical across both parts.

Substitution is valid when packaging format requirements permit the use of alternative tape configurations or when supply chain conditions necessitate component interchange.

Parameter Comparison

Engineering Selection Recommendations

Both TC105303ECTTR and TC105333ECTTR are Active products from Microchip Technology with full RoHS3 compliance and REACH unaffected status. Selection between these parts should be based on packaging format requirements and supply chain availability.

The TC105303ECTTR in Tape & Reel format is suitable for high-volume automated assembly operations where continuous tape feeding is required. The TC105333ECTTR in Cut Tape and Digi-Reel® format provides flexibility for lower-volume production runs, manual assembly processes, or when tape reel compatibility differs from standard equipment configurations.

Both parts maintain identical electrical performance, thermal characteristics, and regulatory compliance. Component-level substitution is valid when packaging format constraints do not restrict the selection. Inventory levels should be considered when procurement planning requires extended lead time mitigation or supply chain redundancy.

Frequently Asked Questions (FAQ)

Q: Can TC105333ECTTR replace TC105303ECTTR in production?

A: Yes, at the component level. Both parts are electrically and mechanically identical. The difference is packaging format: TC105303ECTTR uses Tape & Reel (TR), while TC105333ECTTR uses Cut Tape (CT) and Digi-Reel®. Substitution is valid if your assembly equipment and procurement process support the alternative packaging format.

Q: Are there any functional differences between these parts?

A: No. Both parts share identical specifications across all electrical parameters, including supply voltage range (2.2V ~ 10V), switching frequency (300kHz), duty cycle (100%), operating temperature range (-40°C ~ 85°C), and control features.

Q: Do both parts use the same physical package?

A: Yes. Both TC105303ECTTR and TC105333ECTTR use the SC-74A / SOT-753 package (SOT-23-5), ensuring identical PCB footprint and pin configuration.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) supplies components on continuous tape wound on a reel, suitable for automated high-speed pick-and-place assembly. Cut Tape (CT) and Digi-Reel® provide components on tape segments or alternative reel formats, typically used for lower-volume production or manual assembly processes.

Q: Are compliance certifications identical?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry identical Moisture Sensitivity Level (MSL) ratings of 1 (Unlimited).

Q: Which part should I select for new designs?

A: Selection depends on your manufacturing process and packaging requirements. For high-volume automated assembly, TC105303ECTTR (Tape & Reel) is standard. For flexibility or lower-volume production, TC105333ECTTR (Cut Tape / Digi-Reel®) is appropriate. Both are Active products with equivalent long-term availability.