UCC2805QDREP Equivalent & Substitute Parts

Part Overview

The UCC2805QDREP is a current-mode PWM controller manufactured by Texas Instruments, designed for power supply applications requiring flexible topology support. This Surface Mount device in 8-SOIC packaging operates across a wide supply voltage range (3.6V to 12V) and temperature range (-40°C to 125°C). The part is currently Active in product status with 1156 units in stock. Alternative parts may be required due to inventory constraints, packaging preferences, or specific application requirements such as automotive qualification or extended supply voltage ranges.

Substiute Parts

UCC2805QDREP

Texas InstrumentsIn Stock: 1246UCC2805QDREP Datasheet

Current PartRFQ

UCC2805QDRQ1

Texas InstrumentsIn Stock: 4006UCC2805QDRQ1 Datasheet

Parametric EquivalentRFQ

ISL6843IBZ-T

Renesas Electronics CorporationIn Stock: 17765ISL6843IBZ-T Datasheet

MFR RecommendedRFQ

SG2845DM

Microchip TechnologyIn Stock: 2831SG2845DM Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UCC2805QDREP is determined by the following critical parameters: identical 8-SOIC package footprint, compatible supply voltage range, matching current-mode PWM controller functionality, and compliance with RoHS3 standards. The substitute parts listed below meet these core electrical and mechanical requirements.

UCC2805QDRQ1 qualifies as a parametric equivalent manufactured by Texas Instruments with identical base product number (UCC2805), matching 8-SOIC package, and overlapping supply voltage range (3.6V ~ 11V). This variant includes automotive-grade qualification (AEC-Q100) and differs only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel).

ISL6843IBZ-T (Renesas Electronics Corporation) and SG2845DM (Microchip Technology) represent cross-manufacturer alternatives with the same 8-SOIC package and PWM controller topology. These parts support boost and flyback topologies with different supply voltage specifications and operating temperature ranges, requiring application-level verification of compatibility.

Parameter Comparison

Engineering Selection Recommendations

UCC2805QDRQ1 is the primary substitute for UCC2805QDREP. Both parts share identical Texas Instruments manufacturing, base product number, and electrical specifications. The UCC2805QDRQ1 includes AEC-Q100 automotive qualification, making it suitable for automotive applications. Selection between these two variants depends on packaging requirements (Tape & Reel versus Cut Tape & Digi-Reel®) and automotive compliance needs.

ISL6843IBZ-T (Renesas) is suitable for applications requiring higher supply voltage operation (9V ~ 16V range). This part supports boost and flyback topologies with synchronous rectifier capability. The operating temperature range is reduced to -40°C ~ 105°C, and moisture sensitivity is elevated to MSL 3, requiring controlled storage conditions.

SG2845DM (Microchip) supports the widest supply voltage range (7.6V ~ 30V) and is applicable to flyback topology designs. This part is discontinued at DiGi Electronics and should not be selected for new designs. The operating temperature range (-25°C ~ 85°C) is narrower than the original part.

Frequently Asked Questions (FAQ)

Q: Can UCC2805QDRQ1 be used as a direct replacement for UCC2805QDREP?

A: Yes. Both parts are manufactured by Texas Instruments with identical base product number (UCC2805), matching 8-SOIC package, and overlapping electrical specifications (3.6V ~ 11V supply range, 500 µA supply current, -40°C ~ 125°C operating temperature). The primary difference is packaging format and automotive qualification in the QDRQ1 variant.

Q: What are the key differences between Texas Instruments UCC2805 variants and cross-manufacturer alternatives?

A: Texas Instruments UCC2805 variants (QDREP and QDRQ1) maintain identical electrical specifications and supply voltage ranges. Cross-manufacturer alternatives (ISL6843IBZ-T and SG2845DM) offer different supply voltage ranges, operating temperature limits, and topology support. Selection depends on specific application voltage requirements and thermal operating conditions.

Q: Is ISL6843IBZ-T compatible with designs specified for UCC2805QDREP?

A: ISL6843IBZ-T shares the 8-SOIC package footprint and PWM controller function but operates at higher supply voltages (9V ~ 16V minimum versus 3.6V minimum for UCC2805QDREP). Application-level circuit analysis is required to confirm compatibility with existing designs.

Q: Should SG2845DM be considered for new designs?

A: No. SG2845DM is discontinued at DiGi Electronics and should not be selected for new product designs. UCC2805QDRQ1 or ISL6843IBZ-T are recommended as active alternatives.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: UCC2805QDREP and UCC2805QDRQ1 have MSL 1 (unlimited shelf life). ISL6843IBZ-T has MSL 3, requiring storage at controlled humidity (≤60% RH) for up to 168 hours after packaging. SG2845DM has MSL 1. MSL affects component handling, storage, and reflow processing requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. UCC2805QDREP, UCC2805QDRQ1, ISL6843IBZ-T, and SG2845DM are all ROHS3 compliant and REACH unaffected.