TPS54352PWP Equivalent & Substitute Parts

Part Overview

The TPS54352PWP is a buck switching regulator IC from Texas Instruments' SWIFT™ series, designed for step-down voltage conversion with a fixed 1.2V output at 3A maximum current. 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 qualified substitute components ensures design continuity and supply chain reliability for applications requiring fixed 1.2V regulation.

Key Parameters

Parameter	TPS54352PWP
Manufacturer	Texas Instruments
Function	Step-Down (Buck)
Output Type	Fixed 1.2V
Output Current	3A
Input Voltage Range	4.5V – 20V
Switching Frequency	250kHz, 500kHz
Synchronous Rectifier	Yes
Operating Temperature	-40°C to 85°C (TA)
Package	16-PowerTSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution of the TPS54352PWP is based on the following critical parameters:

Output Current Capability: Minimum 3A to maintain equivalent load handling
Synchronous Rectification: Required for efficiency parity
Input Voltage Compatibility: Must accommodate the 4.5V to 20V input range
Output Voltage Flexibility: Fixed 1.2V output or adjustable output capable of 1.2V operation
Thermal Performance: Operating temperature range must support -40°C to 85°C minimum
Regulatory Compliance: ROHS3 compliance required

The TPS62933DRLR qualifies as a substitute based on its 3A output current, synchronous rectification, overlapping input voltage range (3.8V to 30V), adjustable output voltage (0.8V to 22V, supporting 1.2V configuration), and ROHS3 compliance. The extended operating temperature range (-40°C to 150°C junction temperature) and higher switching frequency flexibility provide additional design margin.

Parameter Comparison

Parameter	TPS54352PWP	TPS62933DRLR	Compatibility Notes
Manufacturer	Texas Instruments	Texas Instruments	Same source
Function	Step-Down (Buck)	Step-Down (Buck)	Identical topology
Output Current	3A	3A	Equivalent
Input Voltage (Min)	4.5V	3.8V	Substitute supports lower minimum
Input Voltage (Max)	20V	30V	Substitute supports higher maximum
Output Voltage	Fixed 1.2V	Adjustable 0.8V – 22V	Substitute requires external resistor network for 1.2V
Switching Frequency	250kHz, 500kHz	200kHz – 2.2MHz	Substitute offers wider frequency range
Synchronous Rectifier	Yes	Yes	Equivalent
Operating Temperature	-40°C to 85°C (TA)	-40°C to 150°C (TJ)	Substitute supports extended range
Package	16-PowerTSSOP	SOT-583	Different package; PCB layout revision required
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent compliance
Product Status	Last Time Buy	Active	Substitute has active production status

Engineering Selection Recommendations

The TPS62933DRLR is qualified as a direct functional substitute for the TPS54352PWP based on equivalent output current, synchronous rectification, overlapping input voltage range, and ROHS3 compliance. Both devices are manufactured by Texas Instruments and maintain regulatory alignment.

Key considerations for implementation:

Output Voltage Configuration: The TPS62933DRLR requires external resistor divider network design to establish 1.2V output, whereas the TPS54352PWP provides fixed 1.2V internally. Design effort is required for feedback network calculation.
Package Transition: Migration from 16-PowerTSSOP to SOT-583 necessitates PCB layout redesign. The SOT-583 package is significantly smaller, potentially reducing board area.
Thermal Margin: The TPS62933DRLR's extended junction temperature rating (150°C) provides additional thermal headroom compared to the ambient temperature specification of the original part.
Supply Continuity: The TPS62933DRLR maintains active production status, ensuring long-term availability and supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the TPS62933DRLR directly replace the TPS54352PWP without circuit modifications?

A: No. While both devices share equivalent output current and synchronous rectification, the TPS62933DRLR requires external resistor network configuration to set the 1.2V output voltage. The TPS54352PWP provides fixed 1.2V internally. Feedback network design is mandatory.

Q: What is the impact of package change from 16-PowerTSSOP to SOT-583?

A: The SOT-583 package is physically smaller than 16-PowerTSSOP. PCB layout must be redesigned to accommodate the new footprint, trace routing, and thermal management considerations. Thermal performance should be re-evaluated for the specific application.

Q: Are both parts compliant with the same regulatory standards?

A: Yes. Both the TPS54352PWP and TPS62933DRLR are ROHS3 compliant and carry EAR99 ECCN classification. Regulatory requirements are equivalent.

Q: Does the TPS62933DRLR support the full input voltage range of the original part?

A: The TPS62933DRLR supports 3.8V to 30V input, which encompasses the TPS54352PWP range of 4.5V to 20V. The substitute provides extended input voltage capability.

Q: What is the significance of the TPS54352PWP being in Last Time Buy status?

A: Last Time Buy status indicates the manufacturer is discontinuing production. Securing inventory or qualifying alternative parts is necessary to maintain long-term design support. The TPS62933DRLR, with Active status, provides supply continuity.

Q: Are there differences in switching frequency between the two parts?

A: The TPS54352PWP operates at fixed 250kHz or 500kHz. The TPS62933DRLR offers programmable frequency from 200kHz to 2.2MHz, providing design flexibility for noise and efficiency optimization.

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