UCC35706D Equivalent & Substitute Parts

Part Overview

The UCC35706D is an offline switch IC manufactured by Texas Instruments, designed for power management applications in boost, flyback, and forward converter topologies. This Active product operates at 1MHz switching frequency with integrated current limiting fault protection. The device is housed in an 8-SOIC surface mount package and supports supply voltages from 8V to 15V with a 12V startup voltage requirement.

Finding equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain component availability across manufacturing cycles.

Substiute Parts

UCC35706D

Texas InstrumentsIn Stock: 2138UCC35706D Datasheet

Current PartRFQ

UCC25706D

UnitrodeIn Stock: 2148UCC25706D Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC35706D is determined by strict alignment of the following critical parameters:

• Topology Support: Boost, Flyback, Forward converter operation
• Voltage Supply Range: 8V ~ 15V input supply compatibility
• Startup Voltage: 12V requirement
• Switching Frequency: 1MHz operation
• Duty Cycle: 93% maximum
• Fault Protection: Current limiting capability
• Package: 8-SOIC form factor with identical 0.154" (3.90mm) width
• Output Isolation: Isolated configuration
• Operating Temperature Range: -55°C ~ 150°C (TJ)
• Mounting: Surface mount technology

The UCC25706D from Unitrode meets all these parameters and qualifies as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the UCC35706D and UCC25706D are Active products with identical electrical and mechanical specifications. Selection between these parts should be based on:

• Supply Chain Availability: Current inventory levels and lead times from respective manufacturers
• Packaging Format: UCC35706D is supplied in Tube packaging; UCC25706D is supplied in Bulk packaging. Verify packaging compatibility with your procurement and assembly processes
• Compliance Requirements: Both parts meet ROHS3 compliance and EAR99 export classification standards
• Regulatory Status: UCC35706D carries REACH Unaffected status; verify UCC25706D compliance with your specific regulatory requirements

No functional or performance differences exist between these parts when used within the specified electrical and thermal operating parameters.

Frequently Asked Questions (FAQ)

Q: Can UCC25706D directly replace UCC35706D in existing designs?

A: Yes. The UCC25706D is a parametric equivalent with identical electrical specifications, switching frequency, topology support, and package dimensions. Direct substitution is possible without circuit redesign.

Q: Are there differences in the 8-SOIC package between these parts?

A: No. Both parts use the same 8-SOIC package with 0.154" (3.90mm) width. PCB footprints and assembly processes are identical.

Q: What is the difference between Tube and Bulk packaging?

A: Tube packaging provides individual component protection in reels suitable for automated assembly lines. Bulk packaging offers cost efficiency for high-volume orders. Both formats contain the same component; selection depends on your manufacturing process requirements.

Q: Do both parts support the same converter topologies?

A: Yes. Both UCC35706D and UCC25706D support Boost, Flyback, and Forward converter topologies with identical operating parameters.

Q: Are there any temperature or voltage rating differences?

A: No. Both parts operate across -55°C to 150°C (TJ) and support 8V to 15V supply voltage with 12V startup requirements.

Q: Which part should I select for new designs?

A: Selection should be based on component availability, packaging requirements, and supply chain strategy. Both parts are functionally equivalent for new designs.