TL1451ACDBRG4 Equivalent & Substitute Parts

Part Overview

The TL1451ACDBRG4 is a Buck, Boost, Flyback Regulator controller IC manufactured by Texas Instruments, designed for positive output step-up, step-down, and step-up/step-down DC-DC conversion applications. This device operates as a transistor driver with multi-topology support and is housed in a 16-SSOP package.

The TL1451ACDBRG4 is currently discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this controller topology.

Substiute Parts

TL1451ACDBRG4

Texas InstrumentsIn Stock: 836TL1451ACDBRG4 Datasheet

Current PartRFQ

TL1451ACDBR

Texas InstrumentsIn Stock: 25379TL1451ACDBR Datasheet

MFR RecommendedRFQ

TL1451CDBR

Texas InstrumentsIn Stock: 9764TL1451CDBR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TL1451ACDBRG4 are identified based on strict electrical and mechanical parameter matching within the TL1451 controller family. The substitution criteria are:

Electrical Parameters (Must Match):

• Output Type: Transistor Driver
• Function: Step-Up, Step-Down, Step-Up/Step-Down
• Output Configuration: Positive
• Topology: Buck, Boost, Flyback
• Number of Outputs: 2
• Output Phases: 1
• Voltage - Supply (Vcc/Vdd): 3.6V ~ 50V
• Frequency - Switching: 1kHz ~ 500kHz
• Control Features: Frequency Control
• Operating Temperature: -20°C ~ 85°C (TA)

Mechanical Parameters (Must Match):

• Package / Case: 16-SSOP (0.209", 5.30mm Width)
• Mounting Type: Surface Mount

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts identified within the TL1451 base product family maintain identical electrical specifications and package geometry, ensuring direct functional and physical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: TL1451ACDBR

The TL1451ACDBR is the manufacturer-recommended substitute for the TL1451ACDBRG4. This part maintains active product status at Texas Instruments and is currently in production with substantial inventory availability (25,299 pcs). All electrical specifications, package geometry, and compliance certifications are identical to the main part. The TL1451ACDBR differs only in packaging format (Tape & Reel) compared to the original part's unspecified packaging, which represents a supply chain advantage without functional impact.

Secondary Substitute: TL1451CDBR

The TL1451CDBR is a parametric equivalent within the TL1451 controller family, maintaining identical electrical and mechanical specifications. This part is currently discontinued at DiGi Electronics, similar to the main part. Inventory availability is moderate (9,713 pcs). Selection of this part should be based on specific supply chain requirements or existing stock considerations.

Both substitute parts are ROHS3 compliant and maintain MSL Level 1 (Unlimited) moisture sensitivity ratings, ensuring compatibility with standard manufacturing and storage environments.

Frequently Asked Questions (FAQ)

Q: Can the TL1451ACDBR directly replace the TL1451ACDBRG4 in existing designs?

A: Yes. The TL1451ACDBR maintains identical electrical specifications, output configuration, topology support, operating temperature range, and 16-SSOP package geometry. Direct substitution is supported without circuit modification.

Q: What is the difference between TL1451ACDBR and TL1451CDBR?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The primary difference is product status: TL1451ACDBR is active in production, while TL1451CDBR is discontinued at DiGi Electronics. Selection should be based on supply chain availability and inventory requirements.

Q: Does packaging format affect compatibility?

A: The TL1451ACDBR is supplied in Tape & Reel (TR) format, while the original TL1451ACDBRG4 packaging is unspecified. Both use the same 16-SSOP physical package (0.209", 5.30mm Width) and Surface Mount mounting type. Tape & Reel format is standard for automated assembly processes and does not affect electrical or mechanical compatibility.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. The TL1451ACDBR and TL1451CDBR are both ROHS3 compliant with MSL Level 1 (Unlimited) ratings, matching the compliance profile of the original TL1451ACDBRG4.

Q: What topologies are supported by these controller ICs?

A: All parts in this substitution group support Buck, Boost, and Flyback topologies with step-up, step-down, and step-up/step-down output configurations. Supply voltage range is 3.6V to 50V with switching frequency capability from 1kHz to 500kHz.