UCC28703DBVR Equivalent & Substitute Parts

Part Overview

The UCC28703DBVR is an offline switching flyback converter IC manufactured by Texas Instruments, designed for isolated power supply applications. This SOT-23-6 surface mount device operates across a 9V to 35V supply voltage range with switching frequencies from 1kHz to 130kHz, incorporating current limiting and overvoltage fault protection. The component is Active status and ROHS3 compliant, making it suitable for modern power management designs requiring isolation and compact form factors.

Substitute parts are necessary when primary inventory is unavailable, when alternative packaging options are required, or when design flexibility permits selection from the UCC287xx controller family while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Topology	Flyback
Output Isolation	Isolated
Voltage Supply Range (Vcc/Vdd)	9V ~ 35V
Voltage Start Up	21V
Frequency Switching	1kHz ~ 130kHz
Fault Protection	Current Limiting, Over Voltage
Operating Temperature	-20°C ~ 125°C (TJ)
Package / Case	SOT-23-6
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the UCC28703DBVR is determined by strict equivalence across the following parameters:

Topology: Flyback converter architecture
Output Isolation: Isolated configuration
Voltage Supply Range: 9V ~ 35V
Voltage Start Up: 21V
Switching Frequency Range: 1kHz ~ 130kHz
Fault Protection: Current Limiting and Over Voltage protection
Operating Temperature Range: -20°C ~ 125°C
Package: SOT-23-6
Mounting Type: Surface Mount
Compliance: ROHS3 Compliant, REACH Unaffected

All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Differences exist only in base product numbering (UCC28700, UCC28701, UCC28702, UCC28703) and packaging designation (DBVR vs DBVT), which represent variant controller configurations within the same functional family.

Parameter Comparison

Part Number	Manufacturer	Topology	Vcc/Vdd Range	Start Up Voltage	Switching Frequency	Fault Protection	Package	Temperature Range	RoHS Status	Inventory (Pcs)
UCC28703DBVR	Texas Instruments	Flyback	9V ~ 35V	21V	1kHz ~ 130kHz	Current Limiting, Over Voltage	SOT-23-6	-20°C ~ 125°C	ROHS3	12200
UCC28700DBVR	Texas Instruments	Flyback	9V ~ 35V	21V	1kHz ~ 130kHz	Current Limiting, Over Voltage	SOT-23-6	-20°C ~ 125°C	ROHS3	6200
UCC28700DBVT	Texas Instruments	Flyback	9V ~ 35V	21V	1kHz ~ 130kHz	Current Limiting, Over Voltage	SOT-23-6	-20°C ~ 125°C	ROHS3	2400
UCC28701DBVT	Texas Instruments	Flyback	9V ~ 35V	21V	1kHz ~ 130kHz	Current Limiting, Over Voltage	SOT-23-6	-20°C ~ 125°C	ROHS3	2650
UCC28702DBVT	Texas Instruments	Flyback	9V ~ 35V	21V	1kHz ~ 130kHz	Current Limiting, Over Voltage	SOT-23-6	-20°C ~ 125°C	ROHS3	1542
UCC28703DBVT	Texas Instruments	Flyback	9V ~ 35V	21V	1kHz ~ 130kHz	Current Limiting, Over Voltage	SOT-23-6	-20°C ~ 125°C	ROHS3	6050

Engineering Selection Recommendations

All substitute parts maintain Active product status and full ROHS3 compliance with REACH unaffected designation. Selection among equivalent parts should be based on:

Packaging designation availability: DBVR and DBVT variants represent different tape and reel configurations. Verify reel specifications with supplier documentation for your assembly equipment compatibility.
Inventory availability: UCC28703DBVR maintains the highest stock level at 12200 units. Alternative variants offer reduced availability ranging from 1542 to 6200 units.
Base product family: UCC28700, UCC28701, UCC28702, and UCC28703 represent distinct controller variants within the same functional specification set. All maintain identical electrical performance across the specified parameter range.
Supply chain continuity: Multiple part numbers within this family provide design flexibility and reduce single-source dependency risk.

Frequently Asked Questions (FAQ)

Q: Can UCC28700DBVR be used as a direct replacement for UCC28703DBVR?

A: Yes. Both parts share identical electrical specifications including topology, voltage range, switching frequency, fault protection, operating temperature, and SOT-23-6 packaging. The difference in base product number (UCC28700 vs UCC28703) represents controller variant designation but does not affect functional compatibility when electrical parameters are equivalent.

Q: What is the difference between DBVR and DBVT packaging designations?

A: DBVR and DBVT represent different tape and reel configurations for surface mount delivery. Both use SOT-23-6 package geometry. Verify reel specifications, tape width, and pitch requirements with your assembly equipment documentation before substitution.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 Compliant status and REACH Unaffected designation, meeting current environmental and regulatory requirements.

Q: Can I substitute between UCC28700, UCC28701, UCC28702, and UCC28703 series?

A: Yes, when all electrical parameters match the application requirements. All variants in this list maintain identical voltage supply range (9V ~ 35V), switching frequency (1kHz ~ 130kHz), fault protection (Current Limiting, Over Voltage), and operating temperature (-20°C ~ 125°C). Consult Texas Instruments datasheets for any internal controller feature differences that may affect your specific application design.

Q: What is the moisture sensitivity level for these parts?

A: All parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

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