UCC28C40DR Equivalent & Substitute Parts

Part Overview

The UCC28C40DR is a Power Management IC (PMIC) manufactured by Texas Instruments, functioning as a multi-topology DC-DC controller. This device operates as a Boost, Flyback, and Forward Converter regulator with positive output configuration, delivering transistor driver output for step-up and step-up/step-down topologies. The part is currently in active product status with 5456 units in stock. Substitute parts are identified to address application requirements including alternative packaging formats, extended supply voltage ranges, or specific thermal operating conditions.

Key Parameters

Parameter	UCC28C40DR
Manufacturer	Texas Instruments
Package / Case	8-SOIC (0.154", 3.90mm Width)
Topology	Boost, Flyback, Forward Converter
Output Type	Transistor Driver
Function	Step-Up, Step-Up/Step-Down
Output Configuration	Positive
Number of Outputs	1
Voltage - Supply (Vcc/Vdd)	6.6V ~ 18V
Frequency - Switching	Up to 1MHz
Duty Cycle (Max)	96%
Operating Temperature	-40°C ~ 105°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the UCC28C40DR are qualified based on the following criteria:

Common Electrical Parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Output Type: Transistor Driver
Function: Step-Up, Step-Up/Step-Down
Output Configuration: Positive
Number of Outputs: 1
Duty Cycle (Max): 96%
Control Features: Frequency Control
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Allowed Variation Parameters:

Voltage - Supply (Vcc/Vdd): Substitute parts may operate within 7.6V ~ 30V range, which encompasses the main part's 6.6V ~ 18V specification
Frequency - Switching: Substitute parts operate up to 500kHz, which is within the main part's 1MHz capability
Topology: Substitute parts support Boost and Flyback topologies (subset of main part's three topologies)
Operating Temperature: Substitute parts operate within -25°C ~ 85°C or 0°C ~ 70°C ranges, which may be narrower than the main part's -40°C ~ 105°C
Packaging Format: Tube or Cut Tape (CT) & Digi-Reel® formats are interchangeable
Manufacturer: STMicroelectronics substitutes are qualified alternatives to Texas Instruments

Parameter Comparison

Parameter	UCC28C40DR	UC2842BD1	UC2842BD1013TR	UC2843BD1	UC2843BD1013TR	UC3843BD1	UC3843BD1013TR
Manufacturer	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Packaging Format	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®
Output Type	Transistor Driver	Transistor Driver	Transistor Driver	Transistor Driver	Transistor Driver	Transistor Driver	Transistor Driver
Function	Step-Up, Step-Up/Step-Down	Step-Up, Step-Up/Step-Down	Step-Up, Step-Up/Step-Down	Step-Up, Step-Up/Step-Down	Step-Up, Step-Up/Step-Down	Step-Up, Step-Up/Step-Down	Step-Up, Step-Up/Step-Down
Output Configuration	Positive	Positive, Isolation Capable	Positive, Isolation Capable	Positive, Isolation Capable	Positive, Isolation Capable	Positive, Isolation Capable	Positive, Isolation Capable
Number of Outputs	1	1	1	1	1	1	1
Voltage - Supply (Vcc/Vdd)	6.6V ~ 18V	10V ~ 30V	10V ~ 30V	7.6V ~ 30V	7.6V ~ 30V	7.6V ~ 30V	7.6V ~ 30V
Frequency - Switching	Up to 1MHz	Up to 500kHz	Up to 500kHz	Up to 500kHz	Up to 500kHz	Up to 500kHz	Up to 500kHz
Duty Cycle (Max)	96%	96%	96%	96%	96%	96%	96%
Operating Temperature	-40°C ~ 105°C (TJ)	-25°C ~ 85°C (TA)	-25°C ~ 85°C (TA)	-25°C ~ 85°C (TA)	-25°C ~ 85°C (TA)	0°C ~ 70°C (TJ)	0°C ~ 70°C (TJ)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active
Inventory (Pcs)	5456	4247	10200	1885	32900	2400	5000200

Engineering Selection Recommendations

All substitute parts maintain active product status and ROHS3 compliance, qualifying them as direct alternatives. Selection between substitute options depends on specific application constraints:

UC2842BD1 / UC2842BD1013TR (STMicroelectronics): These parts support the narrowest supply voltage range (10V ~ 30V) and operate at reduced switching frequency (up to 500kHz). The UC2842BD1013TR variant in Cut Tape format offers higher inventory availability (10200 units) compared to the Tube format UC2842BD1 (4247 units).

UC2843BD1 / UC2843BD1013TR (STMicroelectronics): These parts extend the lower supply voltage limit to 7.6V, closer to the main part's 6.6V specification. The UC2843BD1013TR variant provides significantly higher inventory (32900 units) in Cut Tape format. Both variants carry MSL-3 rating (168 hours), requiring controlled storage conditions compared to the main part's MSL-1.

UC3843BD1 / UC3843BD1013TR (STMicroelectronics): These parts match the main part's supply voltage range (7.6V ~ 30V) and maintain MSL-1 rating. The UC3843BD1013TR variant offers the highest inventory availability (5000200 units) in Cut Tape format. Operating temperature range is narrower (0°C ~ 70°C) compared to the main part's extended range.

Applications requiring operation below 7.6V supply voltage or above 70°C junction temperature should retain the UCC28C40DR. Applications with supply voltages above 18V benefit from substitute parts' extended upper voltage specification.

Frequently Asked Questions (FAQ)

Q: Can UC2842BD1 substitute for UCC28C40DR in all applications?

A: UC2842BD1 is electrically compatible for applications with supply voltages between 10V and 30V. Applications requiring supply voltages below 10V or switching frequencies above 500kHz require the main part or UC2843/UC3843 variants.

Q: What is the difference between UC2843BD1 and UC3843BD1?

A: Both parts support identical electrical specifications (7.6V ~ 30V supply, 500kHz switching frequency, 96% duty cycle). The primary difference is operating temperature range: UC2843BD1 operates -25°C ~ 85°C (TA), while UC3843BD1 operates 0°C ~ 70°C (TJ). UC2843BD1 also carries MSL-3 rating versus UC3843BD1's MSL-1 rating.

Q: Does packaging format affect electrical performance?

A: No. Cut Tape (CT) & Digi-Reel® and Tube packaging formats contain identical die and electrical specifications. Format selection depends on assembly process requirements and inventory availability.

Q: Why do substitute parts have lower maximum switching frequency?

A: Substitute parts operate at up to 500kHz versus the main part's 1MHz. Applications requiring switching frequencies above 500kHz must use UCC28C40DR.

Q: Are all substitute parts suitable for extended temperature applications?

A: No. UCC28C40DR operates -40°C ~ 105°C. UC2842BD1/UC2843BD1 operate -25°C ~ 85°C, and UC3843BD1 operates 0°C ~ 70°C. Applications requiring operation below -25°C or above 85°C require the main part.

Q: What does MSL-3 (168 hours) mean for UC2843 variants?

A: MSL-3 indicates moisture sensitivity level 3, requiring storage in controlled humidity conditions with a 168-hour floor life after bag opening. MSL-1 parts (UC2842BD1, UC3843BD1, UCC28C40DR) have unlimited floor life and less stringent storage requirements.

Q: Which substitute offers the best inventory availability?

A: UC3843BD1013TR provides the highest inventory at 5000200 units in Cut Tape format, followed by UC2843BD1013TR at 32900 units.

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