UC2907N Load Share Controller - Equivalent & Substitute Parts

Part Overview

The UC2907N is a Load Share Controller PMIC manufactured by Texas Instruments in a 16-DIP through-hole package. This device is classified as Last Time Buy, indicating end-of-life status. The UC2907N operates across a wide supply voltage range of 4.5V to 35V with a supply current of 6mA and supports operating temperatures from -40°C to 85°C. Load share controllers are essential in multi-module power supply systems where parallel operation of power supplies requires synchronized current distribution to prevent module overload and ensure system reliability. Due to its Last Time Buy status, identifying functionally equivalent alternatives is necessary for design continuity and long-term product support.

Substiute Parts

UC2907N

Texas InstrumentsIn Stock: 1666UC2907N Datasheet

Current PartRFQ

UCC29002DR

Texas InstrumentsIn Stock: 4657UCC29002DR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The UCC29002DR qualifies as a manufacturer-recommended substitute based on the following substitution criteria:

Functional Equivalence: Both devices are Load Share Controller PMICs from Texas Instruments designed for parallel power supply current distribution applications.

Compliance Alignment: Both parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory continuity.

Supply Voltage Compatibility: The UCC29002DR operates within 4.375V to 14.25V, which overlaps the lower to mid-range of the UC2907N's 4.5V to 35V specification. This makes the UCC29002DR suitable for applications operating within the 4.375V to 14.25V window.

Supply Current Efficiency: The UCC29002DR draws 2.5mA compared to the UC2907N's 6mA, representing improved power efficiency in the substitute design.

Temperature Range Extension: The UCC29002DR supports -40°C to 105°C, extending the upper operating temperature limit by 20°C beyond the UC2907N.

Package Transition: The substitution involves a transition from 16-DIP through-hole to 8-SOIC surface-mount packaging, requiring PCB layout and assembly process modifications.

Parameter Comparison

Engineering Selection Recommendations

For applications within 4.375V to 14.25V supply range: The UCC29002DR is the recommended substitute. It is actively manufactured by Texas Instruments, maintains full ROHS3 and REACH compliance, and offers improved power efficiency with lower supply current draw. The extended operating temperature range to 105°C provides additional thermal margin for demanding applications.

For applications requiring supply voltages above 14.25V or below 4.375V: The UC2907N's wider 4.5V to 35V range cannot be directly substituted by the UCC29002DR. Alternative load share controller solutions from Texas Instruments or other manufacturers must be evaluated for these voltage requirements.

For through-hole assembly constraints: If PCB design or assembly processes cannot accommodate surface-mount 8-SOIC packages, alternative through-hole load share controllers must be sourced, as the UCC29002DR requires surface-mount assembly.

For new designs: The UCC29002DR is preferred due to its active product status, improved efficiency, and extended temperature range, provided voltage and packaging requirements are compatible.

Frequently Asked Questions (FAQ)

Q: Can the UCC29002DR directly replace the UC2907N in existing designs?

A: Direct replacement requires three modifications: (1) PCB layout redesign to accommodate 8-SOIC surface-mount package instead of 16-DIP through-hole, (2) assembly process change to surface-mount technology, and (3) verification that the application supply voltage operates within the UCC29002DR's 4.375V to 14.25V range. If any of these conditions cannot be met, direct substitution is not feasible.

Q: What is the voltage compatibility window for substitution?

A: The UCC29002DR operates within 4.375V to 14.25V. Applications using the UC2907N at voltages below 4.375V or above 14.25V cannot use the UCC29002DR as a substitute without additional voltage regulation or conditioning circuitry.

Q: Does the UCC29002DR maintain the same regulatory compliance?

A: Yes. Both devices are ROHS3 compliant and REACH unaffected, ensuring regulatory continuity for applications subject to these standards.

Q: What are the package and assembly implications?

A: The UC2907N uses a 16-pin DIP through-hole package suitable for breadboarding and through-hole assembly. The UCC29002DR uses an 8-pin SOIC surface-mount package, requiring surface-mount assembly equipment and PCB design modifications. The pin count reduction from 16 to 8 indicates functional consolidation in the newer design.

Q: Is the UCC29002DR suitable for high-temperature applications?

A: The UCC29002DR supports operating temperatures up to 105°C, compared to the UC2907N's 85°C maximum. For applications operating between 85°C and 105°C, the UCC29002DR provides extended thermal capability.

Q: What is the significance of the UC2907N's Last Time Buy status?

A: Last Time Buy indicates the UC2907N is no longer in active production and existing inventory represents the final available stock. New designs should transition to the UCC29002DR or equivalent active alternatives to ensure long-term component availability and supply chain continuity.