UCC2805N Equivalent & Substitute Parts

Part Overview

The UCC2805N is a Power Supply Controller PWM Controller manufactured by Texas Instruments in an 8-PDIP through-hole package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The UCC2805N operates as a multi-topology PWM controller suitable for various power supply applications requiring input voltage regulation and control.

Substiute Parts

UCC2805N

Texas InstrumentsIn Stock: 1093UCC2805N Datasheet

Current PartRFQ

UCC2805D

Texas InstrumentsIn Stock: 1977UCC2805D Datasheet

MFR RecommendedRFQ

UC2845BN

STMicroelectronicsIn Stock: 2001UC2845BN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the UCC2805N is determined by the following critical parameters:

Electrical Compatibility:

• Supply voltage range: 3.6V ~ 11V
• Supply current: 500 µA
• Operating temperature range: -40°C ~ 125°C minimum
• PWM controller functionality for multi-topology applications

Mechanical Compatibility:

• Package type: 8-pin DIP configuration
• Mounting method: Through-hole or surface-mount equivalent
• Pin count and functional pinout alignment

Compliance & Status:

• RoHS3 compliance required
• Active product status preferred due to obsolete status of main part

Two substitute parts meet these criteria with varying package configurations to accommodate different assembly requirements.

Parameter Comparison

Engineering Selection Recommendations

UCC2805D Selection Criteria: The UCC2805D is the direct functional equivalent manufactured by Texas Instruments with identical base product number UCC2805. It maintains the same electrical specifications (3.6V ~ 11V supply, 500 µA current, -40°C ~ 125°C operating range) and is currently in active production status. The primary difference is packaging: UCC2805D uses 8-SOIC surface-mount configuration versus the through-hole 8-DIP of the UCC2805N. This substitute is optimal for new PCB designs utilizing surface-mount assembly processes. Both parts are ROHS3 compliant with unlimited moisture sensitivity level.

UC2845BN Selection Criteria: The UC2845BN is a through-hole 8-DIP package alternative from STMicroelectronics, maintaining mechanical compatibility with the original UCC2805N footprint. This part supports an extended supply voltage range (7.6V ~ 30V) and higher operating temperature maximum (-40°C ~ 150°C). The UC2845BN is suitable for applications where the UCC2805N supply voltage range (3.6V ~ 11V) is insufficient or where extended temperature operation is required. This substitute is appropriate for legacy through-hole assembly processes or retrofit applications requiring direct socket compatibility.

Both substitutes carry active product status and full RoHS3 compliance, ensuring long-term availability and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can UCC2805D replace UCC2805N in existing through-hole designs? A: No. The UCC2805D uses 8-SOIC surface-mount packaging while UCC2805N uses 8-DIP through-hole packaging. Direct socket substitution is not possible. UCC2805D requires PCB redesign for surface-mount assembly or use of an adapter carrier.

Q: Is UC2845BN electrically identical to UCC2805N? A: UC2845BN shares the same 8-DIP through-hole package and pin count as UCC2805N. However, it has a different supply voltage range (7.6V ~ 30V versus 3.6V ~ 11V). Verify your application's supply voltage requirements before substitution. Both are PWM controllers suitable for multi-topology applications.

Q: Why is UCC2805N listed as obsolete? A: Product obsolescence is determined by the manufacturer. Texas Instruments has transitioned the UCC2805 family to active production in alternative packages (UCC2805D in 8-SOIC). For new designs, UCC2805D is the recommended path forward.

Q: Are all substitutes RoHS3 compliant? A: Yes. UCC2805D and UC2845BN are both ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the compliance profile of UCC2805N.

Q: Which substitute should I choose for a new design? A: For new PCB designs, UCC2805D is preferred as it maintains identical electrical specifications and active production status from the original manufacturer. For legacy through-hole assembly or retrofit applications, UC2845BN provides package compatibility with extended voltage and temperature ranges.

Q: What is the operating temperature difference between substitutes? A: UCC2805N and UCC2805D both operate -40°C ~ 125°C. UC2845BN extends the upper limit to 150°C (junction temperature). Select UC2845BN if your application requires operation above 125°C.