TPS54354MPWPREP Equivalent & Substitute Parts

Part Overview

The TPS54354MPWPREP is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for positive fixed 1.8V output applications with 3A current capacity. This device operates across a 4.5V to 20V input range and features synchronous rectification for improved efficiency. The part is currently in Last Time Buy status, indicating end-of-life transition. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain flexibility for applications requiring fixed 1.8V regulation.

Substiute Parts

TPS54354MPWPREP

Texas InstrumentsIn Stock: 982TPS54354MPWPREP Datasheet

Current PartRFQ

TPS54350MPWPREP

Texas InstrumentsIn Stock: 7726TPS54350MPWPREP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The TPS54350MPWPREP qualifies as a direct substitute based on the following alignment criteria:

Matching Parameters:

• Identical manufacturer (Texas Instruments)
• Same package format (16-PowerTSSOP, 0.173", 4.40mm Width)
• Identical output current rating (3A)
• Identical input voltage range (4.5V to 20V)
• Identical switching frequency options (250kHz, 500kHz)
• Identical synchronous rectifier implementation
• Identical operating temperature range (-55°C to 125°C)
• Identical RoHS3 compliance and MSL rating

Key Difference: The TPS54350MPWPREP provides adjustable output voltage (0.891V to 17.2V) versus the fixed 1.8V output of the TPS54354MPWPREP. This adjustability allows the TPS54350MPWPREP to be configured for 1.8V operation through external resistor divider networks, making it functionally equivalent for this specific application while offering broader design flexibility.

Parameter Comparison

Engineering Selection Recommendations

The TPS54350MPWPREP is the recommended substitute for the TPS54354MPWPREP. The primary advantage is product status: the TPS54350MPWPREP maintains Active status, ensuring long-term availability and supply chain stability, whereas the TPS54354MPWPREP is in Last Time Buy phase. Both devices maintain identical RoHS3 compliance and MSL ratings, supporting equivalent reliability and environmental standards.

The adjustable output voltage capability of the TPS54350MPWPREP does not introduce compatibility risk when configured for 1.8V operation. The identical package footprint, current rating, input voltage range, and thermal specifications ensure direct functional replacement within existing PCB designs. The Active product status of the TPS54350MPWPREP provides superior long-term supply assurance compared to the end-of-life TPS54354MPWPREP.

Frequently Asked Questions (FAQ)

Q: Can the TPS54350MPWPREP directly replace the TPS54354MPWPREP without PCB modifications?

A: The TPS54350MPWPREP uses the identical 16-PowerTSSOP package and pinout. However, the adjustable output requires external resistor divider configuration to set 1.8V output. PCB layout modifications are necessary to accommodate feedback network components. Consult the TPS54350MPWPREP datasheet for feedback resistor selection.

Q: What is the primary reason to substitute the TPS54354MPWPREP?

A: The TPS54354MPWPREP is in Last Time Buy status, indicating discontinued production. The TPS54350MPWPREP maintains Active status, ensuring continued availability and supply chain reliability.

Q: Are the electrical specifications identical between these parts?

A: Both devices share identical input voltage range (4.5V to 20V), output current (3A), switching frequency options (250kHz, 500kHz), synchronous rectifier implementation, and operating temperature range (-55°C to 125°C). The key difference is output voltage configuration: fixed 1.8V versus adjustable 0.891V to 17.2V.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the TPS54354MPWPREP and TPS54350MPWPREP are ROHS3 compliant with identical MSL ratings of 2 (1 Year), supporting equivalent environmental and reliability requirements.

Q: Is the package footprint identical?

A: Yes. Both parts use the 16-PowerTSSOP package with 0.173" width (4.40mm), allowing direct PCB footprint compatibility. External component placement for the feedback network on the TPS54350MPWPREP must be planned during design.