TL1451CPWR Equivalent & Substitute Parts

Part Overview

The TL1451CPWR 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-TSSOP surface mount package.

The TL1451CPWR is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production requirements for applications utilizing this controller topology.

Substiute Parts

TL1451CPWR

Texas InstrumentsIn Stock: 777TL1451CPWR Datasheet

Current PartRFQ

TL1451ACPWR

Texas InstrumentsIn Stock: 30161TL1451ACPWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TL1451CPWR is determined by strict equivalence across the following critical parameters:

• Topology and Function: Buck, Boost, Flyback multi-topology support with step-up, step-down, and step-up/step-down capability
• Output Configuration: Positive output configuration with 2 outputs, 1 phase
• Output Type: Transistor driver functionality
• Electrical Specifications: Supply voltage range 3.6V ~ 50V, switching frequency 1kHz ~ 500kHz, frequency control features
• Package and Pinout: 16-TSSOP surface mount package with identical physical dimensions (0.173", 4.40mm Width)
• Operating Temperature Range: -20°C ~ 85°C (TA)
• Compliance: ROHS3 compliance and MSL Level 1 rating

The TL1451ACPWR meets all these criteria and is classified as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The TL1451ACPWR is the direct substitute for the obsolete TL1451CPWR. Both devices are manufactured by Texas Instruments and share identical electrical specifications, package configuration, and compliance certifications. The primary distinction is product status: the TL1451CPWR is obsolete, while the TL1451ACPWR maintains active production status.

Selection of the TL1451ACPWR ensures:

• Continued availability from active production inventory
• Identical functional performance in all supported topologies
• Full compliance with ROHS3 and REACH requirements
• Equivalent thermal and environmental operating characteristics
• Direct pinout and package compatibility for PCB-level integration

Frequently Asked Questions (FAQ)

Q: Can the TL1451ACPWR directly replace the TL1451CPWR in existing designs?

A: Yes. The TL1451ACPWR is a parametric equivalent with identical electrical specifications, package dimensions, pinout configuration, and operating characteristics. No design modifications are required for direct substitution.

Q: What is the difference between TL1451CPWR and TL1451ACPWR?

A: The devices are electrically and functionally identical. The primary difference is product lifecycle status: TL1451CPWR is obsolete, while TL1451ACPWR is in active production. The packaging format differs (TL1451CPWR is standard packaging; TL1451ACPWR is supplied in Tape & Reel format).

Q: Are there any compliance or certification differences?

A: No. Both devices maintain identical ROHS3 compliance, REACH unaffected status, and MSL Level 1 rating. Compliance certifications are equivalent.

Q: What topologies does the TL1451ACPWR support?

A: The TL1451ACPWR supports Buck, Boost, and Flyback topologies with step-up, step-down, and step-up/step-down conversion modes. It operates as a transistor driver with positive output configuration, 2 outputs, and 1 phase.

Q: What is the operating temperature range?

A: The TL1451ACPWR operates across -20°C to 85°C ambient temperature range (TA), matching the TL1451CPWR specification.

Q: Is the 16-TSSOP package identical between both parts?

A: Yes. Both devices use the 16-TSSOP surface mount package with 0.173" width and 4.40mm physical dimensions. PCB footprints are directly compatible.