UCC28085PW Equivalent & Substitute Parts

Part Overview

The UCC28085PW 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 UCC28085PW is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain flexibility for applications requiring offline power conversion with push-pull topology control.

Substiute Parts

UCC28085PW

Texas InstrumentsIn Stock: 676UCC28085PW Datasheet

Current PartRFQ

UCC28085DR

Texas InstrumentsIn Stock: 5445UCC28085DR Datasheet

MFR RecommendedRFQ

UCC28083PW

Texas InstrumentsIn Stock: 1223UCC28083PW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UCC28085PW are identified based on strict electrical and mechanical parameter matching within the offline switch controller category. The substitution logic is organized into two categories:

Manufacturer Recommended Substitute (Functional Equivalent with Package Variation): The UCC28085DR shares all critical electrical parameters with the UCC28085PW, including voltage supply range (8.3V ~ 15V), switching frequency (50kHz ~ 1MHz), duty cycle (49%), and control features (frequency control with current limiting). The primary difference is the package type: UCC28085DR uses 8-SOIC (0.154", 3.90mm Width) instead of 8-TSSOP. This substitution is valid when PCB layout and thermal requirements accommodate the SOIC package footprint.

Parametric Equivalent (Same Package, Different Base Product): The UCC28083PW maintains identical electrical specifications and package type (8-TSSOP) as the UCC28085PW. Both devices operate within the same voltage supply range, switching frequency, and temperature specifications. The UCC28083PW is the parametric equivalent within the same package family.

Key Parameters Determining Substitution:

• Voltage Supply Range: 8.3V ~ 15V (all substitutes match)
• Switching Frequency: 50kHz ~ 1MHz (all substitutes match)
• Topology: Push-Pull (all substitutes match)
• Duty Cycle: 49% (all substitutes match)
• Fault Protection: Current Limiting (all substitutes match)
• Operating Temperature: -40°C ~ 85°C (all substitutes match)
• Output Isolation: Isolated (all substitutes match)

Parameter Comparison

Engineering Selection Recommendations

UCC28085DR Selection Criteria: The UCC28085DR is the manufacturer-recommended substitute when electrical performance requirements are identical to the UCC28085PW and PCB layout permits SOIC package integration. This device carries Active product status, ensuring continued availability and support. The improved Moisture Sensitivity Level (MSL 1, Unlimited) provides superior handling flexibility compared to the UCC28085PW (MSL 2, 1 Year). Both devices maintain ROHS3 compliance and identical electrical specifications across all critical parameters.

UCC28083PW Selection Criteria: The UCC28083PW serves as the parametric equivalent when package footprint compatibility with 8-TSSOP is required and the UCC28085PW becomes unavailable. This device maintains identical package dimensions and electrical performance. However, UCC28083PW carries Last Time Buy status, similar to the UCC28085PW, indicating limited future availability. Selection of UCC28083PW should be evaluated in conjunction with long-term supply chain planning.

Product Status Consideration: The UCC28085PW and UCC28083PW are both Last Time Buy products. For new designs or long-term production requirements, the UCC28085DR (Active status) is the preferred substitute to ensure sustained component availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can UCC28085DR replace UCC28085PW directly on the PCB? A: Electrical substitution is complete; however, package footprint differs. UCC28085DR uses 8-SOIC (0.154", 3.90mm Width) versus UCC28085PW 8-TSSOP (0.173", 4.40mm Width). PCB layout modification is required. Pin-to-pin compatibility must be verified against the specific pinout documentation.

Q: What is the difference between UCC28085PW and UCC28083PW? A: Both devices share identical electrical specifications, switching frequency range (50kHz ~ 1MHz), voltage supply (8.3V ~ 15V), and package type (8-TSSOP). The primary distinction is the base product number designation. Both carry Last Time Buy status.

Q: Why is UCC28085DR recommended over UCC28083PW? A: UCC28085DR maintains Active product status, ensuring continued manufacturing and supply availability. UCC28083PW, like UCC28085PW, is Last Time Buy. For applications requiring long-term component sourcing, UCC28085DR provides superior supply chain continuity.

Q: Are all three parts ROHS3 compliant? A: Yes. UCC28085PW, UCC28085DR, and UCC28083PW are all ROHS3 compliant and REACH unaffected.

Q: What is the impact of different Moisture Sensitivity Levels? A: UCC28085DR has MSL 1 (Unlimited shelf life), while UCC28085PW and UCC28083PW have MSL 2 (1 Year shelf life). MSL 1 provides extended storage capability without moisture bake-out procedures, reducing handling complexity in manufacturing environments.

Q: Can these parts be used interchangeably in existing designs? A: Electrical interchangeability is confirmed across all three parts. Package compatibility depends on PCB design: UCC28085PW and UCC28083PW require 8-TSSOP footprints; UCC28085DR requires 8-SOIC footprint. Pinout verification is mandatory before substitution.