UC2886D Equivalent & Substitute Parts

Part Overview

The UC2886D is a buck regulator positive output step-down DC-DC controller IC manufactured by Texas Instruments in a 16-SOIC package. This device functions as a transistor driver for step-down topologies with a single output phase and operates across a supply voltage range of 10.3V to 20V with a switching frequency between 85kHz and 115kHz. The UC2886D is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

UC2886D

Texas InstrumentsIn Stock: 988UC2886D Datasheet

Current PartRFQ

UCC28250PWR

Texas InstrumentsIn Stock: 2413UCC28250PWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UC2886D requires evaluation against the following critical parameters:

Functional Compatibility: The substitute must support step-down (buck) topology with transistor driver output type and single-phase operation.

Electrical Operating Range: Supply voltage compatibility (10.3V ~ 20V minimum overlap), switching frequency alignment (85kHz ~ 115kHz range), and duty cycle capability (85% maximum).

Regulatory & Compliance: RoHS3 compliance and REACH unaffected status must be maintained.

Package Considerations: The 16-SOIC package is specific to the UC2886D. Substitute parts may utilize different packages; however, pin count, signal integrity, and thermal characteristics must support equivalent circuit implementation.

The UCC28250PWR is identified as the manufacturer-recommended substitute. While this device operates across a broader supply voltage range (4.7V ~ 17V) and supports multiple topologies (full-bridge, half-bridge, push-pull), it provides step-down capability and maintains Texas Instruments manufacturing, RoHS3 compliance, and REACH unaffected status. The UCC28250PWR operates at switching frequencies up to 1.15MHz, exceeding the UC2886D specification, and includes enhanced control features such as synchronous rectification and soft start.

Parameter Comparison

Engineering Selection Recommendations

The UC2886D is obsolete and no longer in active production. The UCC28250PWR is the manufacturer-recommended substitute and maintains active product status with full Texas Instruments support. Both devices are RoHS3 compliant and REACH unaffected, satisfying regulatory requirements for new designs and legacy system support.

The UCC28250PWR operates within the UC2886D supply voltage range (4.7V ~ 17V encompasses 10.3V ~ 20V overlap at the lower boundary; however, the upper limit of 17V is below the UC2886D maximum of 20V). Applications requiring operation above 17V supply voltage require circuit redesign or alternative component selection.

The UCC28250PWR package transition from 16-SOIC to 20-TSSOP necessitates PCB layout modification. The increased pin count (20 versus 16) and different package footprint require schematic and layout redesign. The UCC28250PWR includes integrated synchronous rectification and expanded control features (soft start, ramp, current limit) not present in the UC2886D, potentially reducing external component count and improving efficiency.

Frequently Asked Questions (FAQ)

Q: Can the UCC28250PWR directly replace the UC2886D in existing designs?

A: No. While functionally capable of step-down operation, the UCC28250PWR uses a different package (20-TSSOP versus 16-SOIC), requiring PCB redesign. Pin assignments differ, and the increased pin count necessitates schematic modification. Direct socket replacement is not possible.

Q: What is the supply voltage compatibility between UC2886D and UCC28250PWR?

A: The UC2886D operates from 10.3V to 20V. The UCC28250PWR operates from 4.7V to 17V. The overlap range is 10.3V to 17V. Applications requiring supply voltages between 17V and 20V cannot use the UCC28250PWR without circuit modification.

Q: Does the UCC28250PWR support the same switching frequency as the UC2886D?

A: The UC2886D operates at 85kHz to 115kHz. The UCC28250PWR supports 85kHz to 1.15MHz with programmable frequency control. The UCC28250PWR can operate within the UC2886D frequency range but offers significantly broader frequency capability.

Q: What are the key differences in control features?

A: The UC2886D provides enable and frequency control. The UCC28250PWR adds current limit, ramp, and soft start functions. These additional features enhance system protection and startup behavior but require firmware or control circuit updates to implement.

Q: Is thermal performance comparable between the two devices?

A: The UC2886D operates to 85°C (TA). The UCC28250PWR operates to 125°C (TJ). The UCC28250PWR supports higher junction temperatures, potentially improving thermal margin in high-power applications. Package thermal characteristics differ; the 20-TSSOP may offer different thermal resistance than the 16-SOIC.

Q: Are both devices compliant with current regulatory standards?

A: Yes. Both UC2886D and UCC28250PWR are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements for component selection in new designs and legacy system support.