TPS70451PWPR Equivalent & Substitute Parts

Part Overview

The TPS70451PWPR is a linear voltage regulator IC from Texas Instruments designed for power management applications. It provides dual positive fixed outputs at 3.3V and 1.8V with output currents of 1A and 2A respectively. The device is housed in a 24-HTSSOP surface mount package and is currently in active production status. Finding equivalent substitute parts is necessary when the primary part number becomes unavailable due to supply constraints, inventory limitations, or procurement lead time requirements.

Substiute Parts

TPS70451PWPR

Texas InstrumentsIn Stock: 2337TPS70451PWPR Datasheet

Current PartRFQ

TPS70351PWPR

Texas InstrumentsIn Stock: 2812TPS70351PWPR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The TPS70351PWPR qualifies as a parametric equivalent to the TPS70451PWPR based on identical electrical and functional specifications. Both devices share the following critical substitution criteria:

• Dual positive fixed output voltage configuration (3.3V and 1.8V)
• Identical output current ratings (1A and 2A)
• Maximum input voltage of 6V
• Identical dropout voltage specification (0.25V @ 1A)
• Matching quiescent current (250 µA)
• Identical PSRR performance (65dB at 1kHz, 60dB at 1kHz)
• Identical control and protection feature sets
• Same operating temperature range (-40°C ~ 125°C)
• Identical package type (24-PowerTSSOP)
• Same RoHS3 compliance and MSL rating

The primary difference between these parts is the packaging format: TPS70451PWPR is supplied in Tape & Reel (TR) format, while TPS70351PWPR is supplied in Cut Tape (CT) and Digi-Reel® format. This distinction affects procurement and handling but does not impact electrical performance or functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the TPS70451PWPR and TPS70351PWPR are active production devices from Texas Instruments with identical electrical specifications and functional capabilities. Selection between these parts should be based on procurement requirements and packaging format availability:

The TPS70451PWPR in Tape & Reel format is suitable for high-volume automated assembly operations where continuous reel feeding is required. The TPS70351PWPR in Cut Tape and Digi-Reel® format accommodates lower-volume production runs, prototype development, and applications where smaller quantity procurement is necessary.

Both devices maintain ROHS3 compliance and identical MSL ratings, ensuring equivalent environmental and regulatory compliance. The identical operating temperature range, protection features, and control functionality guarantee direct functional substitution in circuit designs.

Frequently Asked Questions (FAQ)

Q: Can TPS70351PWPR be used as a direct replacement for TPS70451PWPR in production?

A: Yes. Both parts are electrically and functionally identical. The only difference is packaging format (Tape & Reel versus Cut Tape/Digi-Reel®). Direct substitution is valid provided the assembly process can accommodate the alternative packaging format.

Q: Are there any differences in electrical performance between these two part numbers?

A: No. Both devices have identical output voltages (3.3V and 1.8V), output currents (1A and 2A), dropout voltage (0.25V @ 1A), quiescent current (250 µA), PSRR performance, and protection features.

Q: Do both parts require the same PCB layout and circuit design?

A: Yes. Both parts use the identical 24-PowerTSSOP package with 0.173" width and 4.40mm dimensions. PCB footprints, pin assignments, and circuit designs are interchangeable.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel packaging supplies components on continuous reels suitable for automated pick-and-place assembly at high volumes. Cut Tape and Digi-Reel® packaging provides components in smaller quantities on tape segments, suitable for lower-volume production and manual assembly operations.

Q: Are both parts RoHS compliant?

A: Yes. Both TPS70451PWPR and TPS70351PWPR are ROHS3 compliant with identical Moisture Sensitivity Level 2 ratings (1 Year).

Q: Can these parts be used interchangeably in the same design revision?

A: Yes. The identical electrical specifications, control features, protection mechanisms, and package dimensions allow complete interchangeability without design modifications.