TPS54380PWP Equivalent & Substitute Parts

Part Overview

The TPS54380PWP is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for positive adjustable output applications. It delivers 3A output current with an adjustable output voltage range from 0.891V to 5.4V, operating from a 3V to 6V input supply. The device features synchronous rectification and operates at 350kHz switching frequency in a 20-PowerTSSOP surface mount package.

This part is currently in Last Time Buy status, making it necessary to identify equivalent substitute components for ongoing design requirements and future production planning. The TPS6281302QWRWYRQ1 has been identified as a manufacturer-recommended substitute based on compatible electrical and mechanical parameters.

Substiute Parts

TPS54380PWP

Texas InstrumentsIn Stock: 2222TPS54380PWP Datasheet

Current PartRFQ

TPS6281302QWRWYRQ1

Texas InstrumentsIn Stock: 1071TPS6281302QWRWYRQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The TPS6281302QWRWYRQ1 qualifies as a manufacturer-recommended substitute based on the following critical parameters:

Electrical Compatibility:

• Both devices function as positive buck regulators with 3A output current capability
• Both feature synchronous rectification for improved efficiency
• Both operate within overlapping input voltage ranges (TPS54380PWP: 3V–6V; TPS6281302QWRWYRQ1: 2.75V–6V)
• Both support the required operating temperature range of -40°C to 125°C
• Output voltage compatibility: TPS54380PWP adjustable 0.891V–5.4V; TPS6281302QWRWYRQ1 fixed 0.8V

Mechanical Compatibility:

• Both are surface mount devices
• Both are manufactured by Texas Instruments
• Both comply with RoHS3 requirements

Key Substitution Criteria: The primary distinction is that TPS6281302QWRWYRQ1 provides a fixed 0.8V output rather than adjustable output. This substitution is valid only for applications requiring a fixed 0.8V output voltage. The TPS6281302QWRWYRQ1 operates at a higher switching frequency (1.8MHz–4MHz) compared to the TPS54380PWP (350kHz), which affects PCB layout and component selection for filtering.

Parameter Comparison

Engineering Selection Recommendations

For TPS54380PWP Replacement:

The TPS6281302QWRWYRQ1 is suitable as a substitute only when the application requires a fixed 0.8V output voltage. This device is in Active product status, ensuring long-term availability and supply chain stability compared to the Last Time Buy status of the TPS54380PWP.

The TPS6281302QWRWYRQ1 carries AEC-Q100 automotive qualification, making it appropriate for automotive and high-reliability applications. Both devices maintain ROHS3 compliance and support the full -40°C to 125°C operating temperature range.

Design Considerations:

The package transition from 20-PowerTSSOP to 9-VFQFN requires PCB layout redesign. The higher switching frequency of TPS6281302QWRWYRQ1 (1.8MHz–4MHz versus 350kHz) necessitates revised filtering component selection and layout practices to manage electromagnetic interference and maintain signal integrity.

The lower minimum input voltage of TPS6281302QWRWYRQ1 (2.75V versus 3V) provides additional design margin for applications with marginal input supplies.

Frequently Asked Questions (FAQ)

Q: Can TPS6281302QWRWYRQ1 directly replace TPS54380PWP in existing designs?

A: Direct replacement requires verification that your application uses a fixed 0.8V output voltage. If your design requires adjustable output voltage, TPS6281302QWRWYRQ1 is not compatible. Additionally, the package change from 20-PowerTSSOP to 9-VFQFN requires PCB redesign.

Q: What are the key electrical differences between these parts?

A: The primary difference is output voltage configuration: TPS54380PWP provides adjustable output (0.891V–5.4V), while TPS6281302QWRWYRQ1 provides fixed 0.8V output. Switching frequency differs significantly (350kHz versus 1.8MHz–4MHz), affecting filter design. Both deliver 3A output current and feature synchronous rectification.

Q: Are there package compatibility concerns?

A: Yes. TPS54380PWP uses 20-PowerTSSOP packaging, while TPS6281302QWRWYRQ1 uses 9-VFQFN packaging. These are physically different packages requiring complete PCB layout redesign. Pin assignments and thermal characteristics differ.

Q: Does TPS6281302QWRWYRQ1 support the same input voltage range?

A: TPS6281302QWRWYRQ1 supports a slightly lower minimum input voltage (2.75V versus 3V) and the same maximum (6V). This provides additional design margin for low-input-voltage applications.

Q: What compliance certifications apply to each part?

A: Both parts are ROHS3 compliant. TPS6281302QWRWYRQ1 additionally carries AEC-Q100 automotive qualification, making it suitable for automotive and high-reliability applications where this certification is required.

Q: Why is TPS54380PWP in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing this product line. TPS6281302QWRWYRQ1, in Active status, represents the recommended path forward for new designs and ongoing production requirements.