TPS2055DR Equivalent & Substitute Parts

Part Overview

The TPS2055DR is a Power Management IC (PMIC) manufactured by Texas Instruments, classified as a Power Switch/Driver with 1:1 N-Channel configuration. This component operates as a high-side N-channel switch rated for 250mA output current with an 80mOhm typical on-resistance. The device features current limiting, over-temperature protection, and UVLO (Under-Voltage Lock-Out) fault protection, operating across a 2.7V to 5.5V load voltage range in an 8-SOIC surface mount package.

The TPS2055DR is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this power switch topology.

Substiute Parts

TPS2055DR

Texas InstrumentsIn Stock: 1129TPS2055DR Datasheet

Current PartRFQ

TPS2055ADR

Texas InstrumentsIn Stock: 5670TPS2055ADR Datasheet

DirectRFQ

TPS2045DR

Texas InstrumentsIn Stock: 2048TPS2045DR Datasheet

Parametric EquivalentRFQ

TPS2055D

Texas InstrumentsIn Stock: 986TPS2055D Datasheet

DirectRFQ

AP2151SG-13

Diodes IncorporatedIn Stock: 12771AP2151SG-13 Datasheet

MFR RecommendedRFQ

AP2171SG-13

Diodes IncorporatedIn Stock: 12953AP2171SG-13 Datasheet

MFR RecommendedRFQ

AP2191SG-13

Diodes IncorporatedIn Stock: 72611AP2191SG-13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TPS2055DR are classified into two categories based on electrical and mechanical compatibility:

Direct Substitutes (Same Electrical Topology): Parts that maintain identical or functionally equivalent electrical characteristics within the allowed parameter ranges. These include the TPS2055ADR and TPS2055D, which preserve the N-channel, non-inverting input configuration with 250mA output current and 80mOhm on-resistance. Differences are limited to product status (active vs. obsolete) and packaging format (Tape & Reel, Tube).

Parametric Equivalents (Functional Compatibility): Parts that operate within the same voltage and load specifications but may differ in input logic (inverting vs. non-inverting) or other secondary characteristics. The TPS2045DR represents this category, featuring inverting input logic while maintaining identical current, resistance, and thermal specifications.

Cross-Manufacturer Alternatives (Topology Variation): The AP2151SG-13, AP2171SG-13, and AP2191SG-13 (Diodes Incorporated) represent alternative topologies using P-channel output configuration instead of N-channel. These parts maintain the same voltage range (2.7V ~ 5.5V), high-side output configuration, and fault protection features, but offer higher current ratings (500mA to 1.5A) and include status flag functionality. Selection of these alternatives requires circuit topology verification to confirm P-channel compatibility.

Key Parameters Determining Substitution:

• Voltage - Load: 2.7V ~ 5.5V (must match)
• Output Configuration: High Side (must match)
• Fault Protection: Current Limiting, Over Temperature, UVLO (must be present)
• Package: 8-SOIC form factor (must match for PCB compatibility)
• RoHS3 Compliance (required for regulatory alignment)

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): The TPS2055ADR is the primary recommended substitute. It maintains active product status, identical electrical specifications (250mA, 80mOhm, N-channel non-inverting), and full compatibility with existing PCB layouts. The TPS2055D provides an equivalent alternative with identical specifications, differentiated only by packaging format (Tube vs. standard packaging).

For Extended Temperature Range Applications: The TPS2055ADR operates at a reduced lower temperature limit (0°C vs. -40°C). If the original design requires -40°C operation, the TPS2055D maintains the full -40°C to 85°C range while preserving all other electrical characteristics.

For Inverting Logic Circuits: The TPS2045DR accommodates applications requiring inverting input logic while maintaining identical current and resistance specifications. This part is suitable only when circuit topology explicitly requires inverted control signals.

For Higher Current Requirements: The Diodes Incorporated alternatives (AP2151SG-13, AP2171SG-13, AP2191SG-13) provide increased current capacity (500mA to 1.5A) with P-channel topology. These substitutes require circuit redesign to accommodate P-channel operation and are suitable only when higher current margins are needed and the circuit topology supports P-channel switching. The AP2191SG-13 offers the highest current rating (1.5A) with unlimited MSL rating, while AP2171SG-13 provides 1A capacity with extended MSL handling requirements (168 hours).

Compliance Considerations: All recommended substitutes maintain ROHS3 compliance, REACH unaffected status, and EAR99 classification, ensuring regulatory alignment with the original TPS2055DR specification.

Frequently Asked Questions (FAQ)

Q: Can TPS2055ADR be used as a direct drop-in replacement for TPS2055DR?

A: Yes. The TPS2055ADR is electrically and mechanically identical to the TPS2055DR, with the exception of operating temperature range (0°C to 85°C vs. -40°C to 85°C). For applications not requiring -40°C operation, this part provides direct PCB compatibility without circuit modifications.

Q: What is the difference between TPS2055D and TPS2055ADR?

A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is packaging format: TPS2055D is supplied in Tube packaging, while TPS2055ADR uses standard packaging. Both maintain the full -40°C to 85°C operating range and are suitable for direct substitution.

Q: Why would I select TPS2045DR over TPS2055DR?

A: The TPS2045DR is selected only when the circuit design requires inverting input logic. All other electrical parameters (current, resistance, voltage range, protection features) remain identical. This substitution requires verification that the control signal logic is compatible with inverted operation.

Q: Can Diodes Incorporated parts (AP2151SG-13, AP2171SG-13, AP2191SG-13) replace the TPS2055DR directly?

A: These parts cannot be used as direct drop-in replacements. They employ P-channel topology instead of N-channel, requiring circuit redesign. They are suitable only when higher current capacity is needed (500mA to 1.5A) and the circuit topology can accommodate P-channel switching. Verify gate drive voltage compatibility and control signal polarity before selection.

Q: What is the significance of MSL rating differences?

A: MSL (Moisture Sensitivity Level) rating indicates moisture handling requirements during storage and assembly. TPS2055ADR and AP2191SG-13 carry MSL 1 (unlimited shelf life), while AP2171SG-13 carries MSL 3 (168-hour limit after moisture exposure). For standard manufacturing environments, MSL 1 parts are preferred. MSL 3 parts require controlled storage and accelerated bake-out procedures before reflow soldering.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring compatibility with regulatory requirements and environmental standards applicable to the original TPS2055DR specification.

Q: What inventory considerations should guide part selection?

A: TPS2055ADR offers the highest inventory availability (5,628 units), followed by AP2191SG-13 (72,504 units) and AP2171SG-13 (12,900 units). For immediate procurement needs, TPS2055ADR provides the most reliable supply from Texas Instruments. For higher current applications, AP2191SG-13 offers substantial inventory depth.