UCC2802QDREP Equivalent & Substitute Parts

Part Overview

The UCC2802QDREP is an offline switch PWM controller manufactured by Texas Instruments, designed for power supply applications requiring pulse-width modulation control. This active product operates across a wide temperature range (-40°C to 125°C) and is housed in an 8-SOIC surface mount package. The device is ROHS3 compliant with MSL Level 1 rating, indicating unlimited moisture sensitivity protection. Substitute parts are necessary when the primary device is unavailable, when alternative supply chain sources are required, or when design flexibility demands evaluation of functionally equivalent controllers within the same package and electrical parameter envelope.

Substiute Parts

UCC2802QDREP

Texas InstrumentsIn Stock: 1197UCC2802QDREP Datasheet

Current PartRFQ

ISL6843IBZ-T

Renesas Electronics CorporationIn Stock: 17765ISL6843IBZ-T Datasheet

MFR RecommendedRFQ

LT1246CS8#PBF

Analog Devices Inc.In Stock: 1445LT1246CS8#PBF Datasheet

MFR RecommendedRFQ

LT1247CS8#PBF

Analog Devices Inc.In Stock: 2968LT1247CS8#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UCC2802QDREP is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Package compatibility: 8-SOIC form factor (0.154", 3.90mm Width)
• Surface mount mounting type
• Supply voltage range overlap or compatibility with 8.3V ~ 12V specification
• Operating temperature range that meets or exceeds -40°C ~ 125°C
• Active product status and current availability
• ROHS3 compliance and MSL rating suitable for manufacturing processes

Identified Substitute Parts:

The ISL6843IBZ-T (Renesas Electronics Corporation) qualifies as a substitute based on identical 8-SOIC packaging, surface mount configuration, and active product status. However, the supply voltage range (9V ~ 16V) extends above the UCC2802QDREP specification, and the operating temperature maximum is limited to 105°C, which does not fully cover the -40°C ~ 125°C range of the original device.

The LT1246CS8#PBF (Analog Devices Inc.) qualifies as a substitute based on 8-SOIC packaging and surface mount mounting. The supply voltage range (10V ~ 25V) overlaps with the UCC2802QDREP but extends significantly higher. The operating temperature range (0°C ~ 100°C) does not meet the full -40°C ~ 125°C specification of the original device.

The LT1247CS8#PBF (Analog Devices Inc.) qualifies as a substitute based on 8-SOIC packaging and surface mount mounting. The supply voltage range (8.4V ~ 25V) overlaps with the UCC2802QDREP specification. The operating temperature range (0°C ~ 100°C) does not meet the full -40°C ~ 125°C specification of the original device.

Parameter Comparison

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance, meeting baseline regulatory requirements. The LT1247CS8#PBF presents the closest electrical alignment with the UCC2802QDREP, offering a supply voltage range (8.4V ~ 25V) with the lowest minimum specification (8.4V) relative to the original device's 8.3V minimum. Both LT-series devices carry MSL Level 1 rating, matching the moisture sensitivity protection of the original part.

The ISL6843IBZ-T, while package-compatible, carries an MSL Level 3 rating requiring controlled storage conditions (168 hours maximum), which differs from the unlimited MSL Level 1 of the UCC2802QDREP. Additionally, the ISL6843IBZ-T operating temperature maximum of 105°C does not extend to the full 125°C specification of the original device.

The LT1246CS8#PBF exhibits the highest supply voltage minimum (10V), which may introduce compatibility constraints in applications requiring operation at the UCC2802QDREP's lower voltage boundary (8.3V).

All substitute candidates operate within the 8-SOIC package footprint, enabling direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can the ISL6843IBZ-T replace the UCC2802QDREP in all applications?

A: The ISL6843IBZ-T shares the 8-SOIC package and surface mount configuration. However, the operating temperature range limitation (maximum 105°C versus 125°C) and MSL Level 3 rating (versus Level 1) may restrict use in high-temperature or moisture-sensitive manufacturing environments. Verify application temperature requirements before substitution.

Q: What is the primary difference between the LT1246CS8#PBF and LT1247CS8#PBF?

A: Both devices share identical packaging, mounting type, and MSL ratings. The LT1246CS8#PBF is specified as an offline buck converter with isolated output, while the LT1247CS8#PBF is a buck regulator controller with positive output configuration. Both operate at 8-SOIC form factor and support the overlapping supply voltage range with the UCC2802QDREP.

Q: Are there temperature range limitations when substituting with LT-series devices?

A: Yes. Both LT1246CS8#PBF and LT1247CS8#PBF specify operating temperature ranges of 0°C ~ 100°C, which does not cover the full -40°C ~ 125°C range of the UCC2802QDREP. Applications requiring operation below 0°C or above 100°C must retain the original device or verify functional equivalence through datasheet analysis.

Q: Do all substitute parts maintain the same moisture sensitivity protection?

A: No. The UCC2802QDREP and both LT-series devices carry MSL Level 1 (unlimited protection). The ISL6843IBZ-T carries MSL Level 3, requiring storage at controlled humidity (168 hours maximum) before soldering. This affects supply chain handling and manufacturing process compatibility.

Q: Is PCB layout modification required when substituting these parts?

A: No. All substitute parts utilize the 8-SOIC (0.154", 3.90mm Width) package, enabling direct footprint compatibility without PCB redesign or layout modification.