TPS55383PWPR Equivalent & Substitute Parts

Part Overview

The TPS55383PWPR is a buck switching regulator IC from Texas Instruments designed for step-down voltage conversion applications. It delivers positive adjustable output from 0.8V to 26.6V at 3A maximum current, operating across a 4.5V to 28V input range. The device is housed in a 16-PowerTSSOP package and operates at a fixed 310kHz switching frequency without synchronous rectification. This part is currently in Last Time Buy status, making identification of suitable alternatives essential for ongoing design support and production continuity.

Substiute Parts

TPS55383PWPR

Texas InstrumentsIn Stock: 2124TPS55383PWPR Datasheet

Current PartRFQ

TPS62933DRLR

Texas InstrumentsIn Stock: 3071TPS62933DRLR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The TPS62933DRLR qualifies as a manufacturer-recommended substitute based on the following core electrical and mechanical compatibility criteria:

Functional Equivalence: Both devices are buck switching regulators with positive adjustable output topology, enabling step-down voltage conversion in the same application class.

Output Current Rating: Both parts deliver 3A maximum output current, maintaining identical current handling capability.

Output Voltage Range: Both support 0.8V minimum output voltage. The TPS62933DRLR extends maximum output to 22V (versus 26.6V on the TPS55383PWPR), which covers the majority of standard buck regulator applications.

Input Voltage Compatibility: The TPS62933DRLR accepts 3.8V to 30V input, which encompasses the TPS55383PWPR's 4.5V to 28V range with extended lower and upper limits.

Regulatory Compliance: Both parts maintain ROHS3 compliance and EAR99 classification, ensuring equivalent environmental and export compliance.

Key Differences Requiring Design Review: The TPS62933DRLR operates as a single-output device (versus dual outputs on the TPS55383PWPR), features a synchronous rectifier (improving efficiency), operates across a wider frequency range (200kHz to 2.2MHz versus fixed 310kHz), and is packaged in SOT-583 (smaller footprint than 16-PowerTSSOP). The TPS62933DRLR also supports higher operating temperature (up to 150°C) and has superior moisture sensitivity (MSL 1 versus MSL 2).

Parameter Comparison

Engineering Selection Recommendations

The TPS62933DRLR is the manufacturer-recommended substitute for the TPS55383PWPR and is suitable for applications where the following conditions are met:

Single Output Requirement: The design requires only one regulated output. If dual independent outputs are essential to the application, the TPS55383PWPR's dual-output architecture cannot be directly replaced by the single-output TPS62933DRLR without additional external components or alternative solutions.

Output Voltage Ceiling: The maximum output voltage requirement does not exceed 22V. Applications requiring output voltages between 22V and 26.6V will require alternative parts.

Active Product Status: The TPS62933DRLR maintains Active product status with full manufacturing support, ensuring long-term availability and supply chain stability compared to the Last Time Buy status of the TPS55383PWPR.

Compliance Alignment: Both parts maintain identical RoHS3 compliance and regulatory classification, eliminating compliance-related redesign requirements.

Thermal Performance: The TPS62933DRLR's extended operating temperature range (-40°C to 150°C) and improved moisture sensitivity rating (MSL 1) provide enhanced reliability margins for demanding environments.

Frequently Asked Questions (FAQ)

Q: Can the TPS62933DRLR directly replace the TPS55383PWPR in existing designs?

A: Direct replacement is possible only if the design uses a single output channel. The TPS55383PWPR provides two independent outputs, while the TPS62933DRLR provides one. Designs utilizing both output channels require alternative solutions or external component additions.

Q: What is the impact of the different package types (16-PowerTSSOP versus SOT-583)?

A: The packages are physically incompatible and require PCB redesign. The SOT-583 is significantly smaller than the 16-PowerTSSOP, which may reduce board space but necessitates layout modifications and re-qualification of thermal management.

Q: How does the synchronous rectifier in the TPS62933DRLR affect performance?

A: The integrated synchronous rectifier in the TPS62933DRLR reduces conduction losses and improves efficiency compared to the non-synchronous TPS55383PWPR, particularly at lower output voltages and higher load currents.

Q: Are there output voltage limitations when substituting?

A: Yes. The TPS62933DRLR maximum output voltage is 22V, while the TPS55383PWPR reaches 26.6V. Applications requiring output voltages above 22V cannot use the TPS62933DRLR as a substitute.

Q: What are the switching frequency implications?

A: The TPS55383PWPR operates at a fixed 310kHz, while the TPS62933DRLR operates across 200kHz to 2.2MHz. The adjustable frequency range of the TPS62933DRLR allows optimization for specific EMI and efficiency requirements but requires design validation to ensure compatibility with existing filter and noise specifications.

Q: Does the MSL rating difference affect component handling?

A: Yes. The TPS55383PWPR has MSL 2 (1-year shelf life), while the TPS62933DRLR has MSL 1 (unlimited shelf life). The TPS62933DRLR provides superior moisture tolerance and longer storage capability without baking requirements.