TPS2055ADRG4 Equivalent & Substitute Parts

Part Overview

The TPS2055ADRG4 is a Power Switch/Driver IC featuring 1:1 N-Channel configuration with 250mA output capacity in an 8-SOIC package. This component is classified as discontinued at DiGi Electronics, necessitating identification of active equivalent and substitute parts for ongoing design requirements and procurement needs. The part provides high-side switching with current limiting, over-temperature protection, and UVLO (Under-Voltage Lock-Out) fault protection suitable for general-purpose power switching applications.

Substiute Parts

TPS2055ADRG4

Texas InstrumentsIn Stock: 7944TPS2055ADRG4 Datasheet

Current PartRFQ

TPS2055ADR

Texas InstrumentsIn Stock: 5670TPS2055ADR Datasheet

MFR RecommendedRFQ

TPS2045ADR

Texas InstrumentsIn Stock: 4345TPS2045ADR Datasheet

Parametric EquivalentRFQ

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

Substitution of the TPS2055ADRG4 is determined by the following critical parameters:

Primary Substitution Criteria:

• Output Type (N-Channel vs. P-Channel topology)
• Output Configuration (High Side)
• Ratio - Input:Output (1:1)
• Voltage - Load range (2.7V ~ 5.5V compatibility)
• Current - Output capacity (minimum 250mA)
• Rds On characteristics (on-resistance)
• Fault Protection features (Current Limiting, Over Temperature, UVLO)
• Package compatibility (8-SOIC form factor)

Substitute Categories:

1. Direct Manufacturer Equivalent (Texas Instruments): TPS2055ADR provides identical electrical specifications with active product status, differing only in packaging configuration.

2. Parametric Equivalent (Texas Instruments): TPS2045ADR maintains core electrical parameters but features inverting input logic, requiring circuit design adaptation.

3. Functional Alternatives (Diodes Incorporated): AP2151SG-13, AP2171SG-13, and AP2191SG-13 employ P-Channel topology with higher current ratings (500mA to 1.5A) and extended temperature range (-40°C ~ 85°C), suitable for applications requiring increased current capacity or wider operating temperature specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification Required):

TPS2055ADR is the primary recommendation as a direct substitute. This part maintains identical electrical specifications and non-inverting input logic while offering active product status and established supply chain availability. Both components are ROHS3 compliant with MSL 1 rating, ensuring compatibility with standard manufacturing processes.

For Applications Requiring Input Logic Inversion:

TPS2045ADR provides parametric equivalence with inverting input configuration. Selection of this part requires circuit design modification to accommodate the inverted logic signal path while maintaining all other electrical parameters.

For Applications Requiring Extended Current Capacity or Temperature Range:

The Diodes Incorporated family (AP2151SG-13, AP2171SG-13, AP2191SG-13) offers higher current ratings and extended operating temperature range (-40°C ~ 85°C). These P-Channel alternatives require circuit topology redesign due to output type change from N-Channel to P-Channel. Selection depends on specific current requirements: AP2151SG-13 (500mA), AP2171SG-13 (1A), or AP2191SG-13 (1.5A). All three maintain ROHS3 compliance and provide reverse current protection in addition to standard fault protection features.

All substitute parts maintain the 8-SOIC package form factor, enabling direct PCB footprint compatibility without layout modification.

Frequently Asked Questions (FAQ)

Q: Can TPS2055ADR be used as a direct drop-in replacement for TPS2055ADRG4?

A: Yes. TPS2055ADR provides identical electrical specifications, non-inverting input logic, and 8-SOIC package compatibility. The primary difference is product status (active vs. discontinued), making it suitable for direct substitution without circuit modification.

Q: What is the key difference between TPS2045ADR and TPS2055ADR?

A: Both parts share identical electrical parameters (250mA output, 80mOhm Rds On, 2.7V ~ 5.5V load voltage). The critical distinction is input logic: TPS2055ADR uses non-inverting logic while TPS2045ADR uses inverting logic. Circuit design must be adapted to accommodate the inverted signal path when selecting TPS2045ADR.

Q: Why would I select an AP-series part over the TPS-series alternatives?

A: AP-series parts (AP2151SG-13, AP2171SG-13, AP2191SG-13) are selected when applications require higher output current capacity (500mA to 1.5A) or extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 85°C). These parts employ P-Channel topology and include reverse current protection. Selection requires circuit topology redesign due to output type change.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All listed substitute parts use the 8-SOIC (0.154", 3.90mm Width) package, enabling direct PCB footprint compatibility. No layout modification is required for package accommodation.

Q: What compliance certifications apply to all substitute parts?

A: All parts listed maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity levels vary: TPS2055ADRG4, TPS2055ADR, and AP2191SG-13 are MSL 1 (Unlimited); TPS2045ADR is MSL 1 (Unlimited); AP2151SG-13 is MSL 1 (Unlimited); AP2171SG-13 is MSL 3 (168 Hours).

Q: Can P-Channel parts (AP-series) replace N-Channel parts (TPS-series) without circuit modification?

A: No. P-Channel and N-Channel topologies require different circuit configurations. Substitution of AP-series P-Channel parts for TPS-series N-Channel parts requires complete circuit redesign to accommodate the output type change and different control logic.

Q: What inventory status should I consider for procurement planning?

A: TPS2055ADR (5,628 pcs), TPS2045ADR (4,269 pcs), AP2151SG-13 (12,700 pcs), AP2171SG-13 (12,900 pcs), and AP2191SG-13 (72,504 pcs) are all listed as new original in stock. Availability should be confirmed with your supplier for current procurement timelines.