UCC35702N Equivalent & Substitute Parts

Part Overview

The UCC35702N is a Power Management IC (PMIC) manufactured by Texas Instruments, designed as a multi-topology DC-DC controller supporting Boost, Flyback, and Forward Converter topologies. This device functions as a transistor driver for step-up and step-up/step-down applications with positive, isolation-capable output configuration.

The UCC35702N is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support legacy system maintenance where this controller is currently deployed.

Substiute Parts

UCC35702N

Texas InstrumentsIn Stock: 1187UCC35702N Datasheet

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UCC25702N

UnitrodeIn Stock: 2132UCC25702N Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the UCC35702N is determined by strict alignment of the following critical parameters:

• Topology support: Boost, Flyback, Forward Converter
• Output type: Transistor Driver
• Function: Step-Up, Step-Up/Step-Down capability
• Output configuration: Positive, Isolation Capable
• Number of outputs: 1
• Supply voltage range: 8.8V ~ 15V
• Switching frequency: 100kHz
• Maximum duty cycle: 99%
• Control features: Current Limit, Frequency Control, Sequencing, Soft Start
• Package / Case: 14-DIP (0.300", 7.62mm)

The UCC25702N meets all substitution criteria. This part maintains functional equivalence across all specified electrical and mechanical parameters, ensuring direct compatibility in applications currently using the UCC35702N.

Parameter Comparison

Engineering Selection Recommendations

The UCC25702N is the qualified substitute for the UCC35702N based on the following engineering criteria:

Functional Equivalence: The UCC25702N maintains identical electrical specifications across all critical parameters including topology support, output type, control features, and switching characteristics.

Product Status: The UCC25702N carries Active product status, ensuring ongoing manufacturer support, availability, and compliance maintenance. The UCC35702N is Obsolete, making the UCC25702N the appropriate choice for new designs and legacy system support.

Compliance: Both parts maintain ROHS3 compliance and EAR99 export classification. The UCC25702N sustains compliance standards required for current manufacturing and regulatory environments.

Operating Temperature Range: The UCC25702N provides an extended operating temperature range (-40°C ~ 85°C) compared to the UCC35702N (0°C ~ 70°C), offering broader application flexibility for temperature-sensitive environments.

Packaging Consideration: The UCC25702N is available in Surface Mount configuration, while the UCC35702N uses Through Hole mounting. Both maintain the same 14-DIP package footprint (0.300", 7.62mm), but mounting type differences require board-level design verification.

Frequently Asked Questions (FAQ)

Q: Can the UCC25702N directly replace the UCC35702N in existing designs?

A: The UCC25702N provides electrical and functional equivalence across all specified parameters. However, the mounting type differs (Surface Mount vs. Through Hole). Board-level compatibility must be verified based on your PCB design and assembly capabilities.

Q: What are the key differences between these parts?

A: The primary differences are: (1) Product Status—UCC25702N is Active while UCC35702N is Obsolete; (2) Operating Temperature Range—UCC25702N supports -40°C ~ 85°C versus 0°C ~ 70°C; (3) Mounting Type—UCC25702N is Surface Mount while UCC35702N is Through Hole. All electrical and functional specifications remain identical.

Q: Why is the UCC35702N obsolete?

A: The UCC35702N has reached end-of-life status. The UCC25702N represents the active equivalent, ensuring continued access to this controller topology with modern compliance and support.

Q: Are there any compliance or certification differences?

A: Both parts maintain ROHS3 compliance and EAR99 classification. The UCC25702N sustains current regulatory standards applicable to active products.

Q: What should I verify before implementing the UCC25702N as a substitute?

A: Verify PCB mounting compatibility (Surface Mount vs. Through Hole), board layout for the 14-DIP package footprint, and thermal management requirements for your specific application. Electrical specifications are equivalent across all critical parameters.

Q: Is the UCC25702N available in inventory?

A: Availability status should be confirmed with your component supplier. The UCC25702N carries Active product status, indicating ongoing manufacturing and distribution support.