UC3907N Load Share Controller - Equivalent & Substitute Parts

Part Overview

The UC3907N 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 UC3907N operates across a wide supply voltage range of 4.5V to 36V with a supply current of 6mA and supports operating temperatures from 0°C to 70°C. Due to its Last Time Buy status, identifying functionally equivalent substitute parts is essential for design continuity and long-term product support.

Key Parameters

Parameter	UC3907N
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Load Share Controller
Package Type	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Supply Voltage Range	4.5V ~ 36V
Supply Current	6mA
Operating Temperature	0°C ~ 70°C
Product Status	Last Time Buy
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

The UCC29002DR qualifies as a functional substitute for the UC3907N based on the following substitution criteria:

Functional Equivalence: Both devices are Load Share Controller PMICs manufactured by Texas Instruments, serving identical application purposes in power management circuits.

Compliance Alignment: Both parts maintain ROHS3 compliance and REACH Unaffected status, ensuring regulatory compatibility across manufacturing environments.

Electrical Parameter Compatibility: The UCC29002DR operates within a supply voltage range of 4.375V to 14.25V, which overlaps the UC3907N's 4.5V to 36V range within the common operating window. The UCC29002DR's supply current of 2.5mA is lower than the UC3907N's 6mA, indicating improved efficiency characteristics.

Temperature Range Consideration: The UCC29002DR supports an extended operating temperature range of -40°C to 105°C, exceeding the UC3907N's 0°C to 70°C specification, providing broader environmental compatibility.

Package Transition: The substitution involves a package change from 16-DIP (through-hole) to 8-SOIC (surface-mount), requiring PCB redesign and assembly process modification.

Parameter Comparison

Parameter	UC3907N	UCC29002DR	Notes
Manufacturer	Texas Instruments	Texas Instruments	Same manufacturer
Category	Power Management (PMIC)	Power Management (PMIC)	Same functional category
Function	Load Share Controller	Load Share Controller	Identical application
Supply Voltage Range	4.5V ~ 36V	4.375V ~ 14.25V	Overlapping range; UCC29002DR limited to 14.25V maximum
Supply Current	6mA	2.5mA	UCC29002DR draws less supply current
Operating Temperature	0°C ~ 70°C	-40°C ~ 105°C	UCC29002DR supports extended temperature range
Package / Case	16-DIP (0.300", 7.62mm)	8-SOIC (0.154", 3.90mm Width)	Different package; through-hole vs. surface-mount
Mounting Type	Through Hole	Surface Mount	Assembly process change required
Product Status	Last Time Buy	Active	UCC29002DR actively manufactured
RoHS Compliance	ROHS3 Compliant	ROHS3 Compliant	Both meet RoHS3 requirements
Moisture Sensitivity Level	Not Applicable	1 (Unlimited)	UCC29002DR has standard MSL rating

Engineering Selection Recommendations

Active Product Status: The UCC29002DR maintains Active product status with Texas Instruments, ensuring continued manufacturing support, availability, and technical documentation updates. The UC3907N's Last Time Buy designation limits future procurement options and support.

Regulatory Compliance: Both devices satisfy ROHS3 and REACH requirements, maintaining compliance with current environmental and hazardous substance regulations across global markets.

Supply Chain Continuity: Selection of the UCC29002DR provides long-term design viability and eliminates obsolescence risk associated with Last Time Buy components.

Design Considerations: Substitution requires evaluation of the reduced maximum supply voltage (14.25V vs. 36V) against circuit requirements. PCB redesign is mandatory due to package transition from through-hole to surface-mount technology.

Frequently Asked Questions (FAQ)

Q: Can the UCC29002DR directly replace the UC3907N without PCB modification?

A: No. The UCC29002DR uses an 8-SOIC surface-mount package, while the UC3907N uses a 16-DIP through-hole package. PCB layout redesign and assembly process changes are required.

Q: What is the maximum supply voltage limitation for the UCC29002DR?

A: The UCC29002DR operates up to 14.25V maximum supply voltage, compared to the UC3907N's 36V maximum. Circuit designs requiring supply voltages above 14.25V cannot use the UCC29002DR as a substitute.

Q: Are there pin-to-pin compatibility considerations?

A: No direct pin compatibility exists due to different package types and pin counts (16-DIP vs. 8-SOIC). Functional signal mapping and circuit redesign are necessary.

Q: Does the UCC29002DR provide improved performance characteristics?

A: The UCC29002DR demonstrates lower supply current consumption (2.5mA vs. 6mA) and supports an extended operating temperature range (-40°C to 105°C vs. 0°C to 70°C), offering advantages in power efficiency and environmental robustness.

Q: What is the inventory status for both parts?

A: UC3907N has 2471 pieces in stock (Last Time Buy status). UCC29002DR has 4577 pieces in stock with Active product status, providing superior long-term availability.

Q: Are both parts RoHS compliant?

A: Yes. Both UC3907N and UCC29002DR are ROHS3 compliant and REACH unaffected, meeting current environmental regulations.

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