TPS54673PWPR Equivalent & Substitute Parts

Part Overview

The TPS54673PWPR is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for positive adjustable step-down voltage regulation with 6A output current capability. This device operates across a 3V to 6V input range and delivers adjustable output voltage from 0.891V to 4.5V. The component is currently in Last Time Buy status, making identification of functionally equivalent alternatives essential for design continuity and long-term supply chain planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	TPS54673PWPR
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Function	Step-Down (Buck)
Output Configuration	Positive Adjustable
Number of Outputs	1
Voltage - Input (Min/Max)	3V / 6V
Voltage - Output (Min/Max)	0.891V / 4.5V
Current - Output	6A
Frequency - Switching	350kHz, 550kHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount
Package / Case	28-PowerTSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution of the TPS54673PWPR is determined by the following critical parameters:

Output current capability: 6A minimum
Synchronous rectifier topology: Required
Output voltage adjustability: Positive adjustable configuration
Operating temperature range: -40°C to 125°C
RoHS3 compliance and REACH unaffected status
Surface mount packaging with compatible footprint considerations

The TPS62867RQYR qualifies as a manufacturer-recommended substitute based on matching these core electrical and compliance parameters, despite differences in package form factor and switching frequency.

Parameter Comparison

Parameter	TPS54673PWPR	TPS62867RQYR	Compatibility Notes
Manufacturer	Texas Instruments	Texas Instruments	Same manufacturer
Category	Power Management (PMIC)	Power Management (PMIC)	Identical category
Function	Step-Down (Buck)	Step-Down (Buck)	Identical topology
Output Configuration	Positive Adjustable	Positive Adjustable	Identical output type
Number of Outputs	1	1	Identical
Voltage - Input (Min)	3V	2.4V	TPS62867RQYR has lower minimum input
Voltage - Input (Max)	6V	5.5V	TPS54673PWPR has higher maximum input
Voltage - Output (Min)	0.891V	0.8V	Both support low adjustable output
Voltage - Output (Max)	4.5V	5.5V	TPS62867RQYR has higher maximum output
Current - Output	6A	6A	Identical current rating
Frequency - Switching	350kHz, 550kHz	2.4MHz	Different switching frequencies
Synchronous Rectifier	Yes	Yes	Both include synchronous rectification
Operating Temperature	-40°C ~ 125°C (TJ)	-40°C ~ 125°C (TJ)	Identical temperature range
Mounting Type	Surface Mount	Surface Mount	Both surface mount
Package / Case	28-PowerTSSOP (0.173", 4.40mm Width)	9-VFQFN (1.5x2.5)	Different package form factors
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Both compliant
Product Status	Last Time Buy	Active	TPS62867RQYR is actively manufactured

Engineering Selection Recommendations

The TPS62867RQYR is designated as the manufacturer-recommended substitute for the TPS54673PWPR. Both devices maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity. The TPS62867RQYR is in Active product status, providing ongoing availability and supply security compared to the Last Time Buy status of the TPS54673PWPR.

Electrical compatibility is established through matching 6A output current, positive adjustable output configuration, synchronous rectifier topology, and identical -40°C to 125°C operating temperature range. The TPS62867RQYR offers expanded input voltage range (2.4V to 5.5V) and output voltage range (0.8V to 5.5V), providing broader application flexibility.

The primary design consideration is package form factor transition from 28-PowerTSSOP to 9-VFQFN, which requires PCB layout modification. The TPS62867RQYR operates at 2.4MHz switching frequency compared to the TPS54673PWPR's 350kHz/550kHz options, affecting EMI characteristics and component selection for filtering networks.

Frequently Asked Questions (FAQ)

Q: Can the TPS62867RQYR directly replace the TPS54673PWPR without circuit modifications?

A: Electrical substitution is valid based on matching output current, topology, and voltage adjustability. However, package form factor differs (28-PowerTSSOP versus 9-VFQFN), requiring PCB layout redesign. The higher switching frequency of the TPS62867RQYR may necessitate adjustment of external filter component values.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by 6A output current capability, positive adjustable output configuration, buck topology with synchronous rectification, and -40°C to 125°C operating temperature range. Both devices meet these criteria.

Q: Does the TPS62867RQYR support the same input voltage range as the TPS54673PWPR?

A: The TPS62867RQYR supports 2.4V to 5.5V input, while the TPS54673PWPR operates from 3V to 6V. The TPS62867RQYR's lower minimum input is compatible with TPS54673PWPR applications, but designs requiring 5.5V to 6V input must verify alternative solutions.

Q: Are there compliance or certification differences between these parts?

A: Both devices are ROHS3 compliant and REACH unaffected. Compliance status is equivalent. The TPS62867RQYR's Active product status ensures continued manufacturing support and availability.

Q: How does the switching frequency difference affect circuit design?

A: The TPS62867RQYR operates at 2.4MHz versus the TPS54673PWPR's 350kHz/550kHz. Higher switching frequency reduces external inductor and capacitor sizes but increases EMI considerations. Output filter design must be recalculated for the substitute device.

Q: Is the TPS62867RQYR available in the same packaging options?

A: No. The TPS62867RQYR is supplied in 9-VFQFN package (1.5x2.5mm), while the TPS54673PWPR uses 28-PowerTSSOP (0.173", 4.40mm Width). PCB footprint redesign is required for substitution.

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