UCC38085PW Equivalent & Substitute Parts

Part Overview

The UCC38085PW is an offline switch controller IC designed for push-pull converter topologies, manufactured by Texas Instruments. This device operates across a switching frequency range of 50kHz to 1MHz and is housed in an 8-TSSOP surface mount package. The UCC38085PW is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support, production continuity, and component sourcing.

Substiute Parts

UCC38085PW

Texas InstrumentsIn Stock: 762UCC38085PW Datasheet

Current PartRFQ

UCC38085D

Texas InstrumentsIn Stock: 1069UCC38085D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UCC38085PW are identified based on strict electrical and mechanical compatibility criteria. The primary substitute, UCC38085D, shares the identical electrical specifications with the main part, including voltage supply range (8.3V ~ 15V), startup voltage (12.5V), switching frequency capability (50kHz ~ 1MHz), duty cycle (49%), fault protection (current limiting), and control features (frequency control). The key differentiator is the package type: UCC38085D is supplied in 8-SOIC (0.154", 3.90mm Width) format rather than 8-TSSOP.

Substitution eligibility is determined by the following parameters:

• Identical topology (Push-Pull)
• Matching voltage supply specifications
• Equivalent switching frequency range
• Same fault protection mechanism
• Identical control feature set
• Output isolation capability
• Surface mount compatibility
• RoHS3 compliance

The UCC38085D represents a direct functional equivalent with a different package footprint, making it suitable for applications where PCB layout accommodates the 8-SOIC package geometry.

Parameter Comparison

Engineering Selection Recommendations

The UCC38085D is the primary substitute for the UCC38085PW. Both parts maintain identical electrical specifications across all critical parameters: voltage supply range, startup voltage, switching frequency capability, duty cycle, fault protection, and control features. Both devices are RoHS3 compliant and operate within the same temperature range.

The UCC38085D is classified as Last Time Buy, indicating limited availability but continued support from the manufacturer. Selection between the main part and substitute should be based on PCB layout requirements. The UCC38085PW uses an 8-TSSOP package (4.40mm width), while the UCC38085D uses an 8-SOIC package (3.90mm width). Both are surface mount devices with compatible pinout functionality for push-pull converter applications.

Frequently Asked Questions (FAQ)

Q: Can UCC38085D directly replace UCC38085PW in existing designs? A: Electrical substitution is direct due to identical specifications. Physical substitution requires PCB layout modification to accommodate the different package footprint (8-SOIC vs. 8-TSSOP). Pin functionality remains equivalent.

Q: What is the primary difference between UCC38085PW and UCC38085D? A: The packages differ. UCC38085PW is 8-TSSOP (0.173", 4.40mm width), while UCC38085D is 8-SOIC (0.154", 3.90mm width). All electrical parameters are identical.

Q: Are both parts RoHS compliant? A: Yes, both UCC38085PW and UCC38085D are ROHS3 compliant.

Q: What is the significance of the product status difference? A: UCC38085PW is obsolete with no further availability. UCC38085D is Last Time Buy, meaning limited stock remains available from the manufacturer before discontinuation. For new designs or long-term production, alternative solutions should be evaluated.

Q: Do the parts share the same base product number? A: Yes, both parts share the base product number UCC38085, confirming they are variants of the same controller IC family.

Q: What are the key parameters that determine substitution eligibility? A: Substitution is based on matching topology (Push-Pull), voltage supply range (8.3V ~ 15V), startup voltage (12.5V), switching frequency range (50kHz ~ 1MHz), duty cycle (49%), fault protection (current limiting), control features (frequency control), and output isolation capability.