TPS2045ADRG4 Equivalent & Substitute Parts

Part Overview

The TPS2045ADRG4 is a Power Management IC (PMIC) functioning as a power switch/driver with 1:1 N-Channel configuration, rated for 250mA output current in an 8-SOIC package. This component is discontinued at DiGi Electronics, necessitating identification of equivalent and substitute parts for ongoing design requirements and production continuity.

Substiute Parts

TPS2045ADRG4

Texas InstrumentsIn Stock: 1189TPS2045ADRG4 Datasheet

Current PartRFQ

TPS2045ADR

Texas InstrumentsIn Stock: 4345TPS2045ADR Datasheet

Parametric EquivalentRFQ

TPS2055ADR

Texas InstrumentsIn Stock: 5670TPS2055ADR Datasheet

Parametric EquivalentRFQ

AP2141SG-13

Diodes IncorporatedIn Stock: 7394AP2141SG-13 Datasheet

MFR RecommendedRFQ

AP2161SG-13

Diodes IncorporatedIn Stock: 31559AP2161SG-13 Datasheet

MFR RecommendedRFQ

AP2181SG-13

Diodes IncorporatedIn Stock: 17021AP2181SG-13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the TPS2045ADRG4 is determined by the following critical parameters:

Primary Equivalence Criteria:

• Output Configuration: High Side
• Voltage - Load: 2.7V ~ 5.5V
• Package Type: 8-SOIC form factor
• Fault Protection: Current Limiting (Fixed), Over Temperature, UVLO
• RoHS3 Compliance and MSL Level 1

Secondary Compatibility Factors:

• Current - Output (Max): Minimum 250mA
• Rds On (Typ): 80mOhm baseline
• Operating Temperature Range: 0°C ~ 85°C or broader
• Input Type: Inverting or Non-Inverting (logic-level dependent)
• Output Type: N-Channel or P-Channel (circuit topology dependent)

Substitutes are grouped into two categories: parametric equivalents (identical electrical specifications with different packaging) and manufacturer-recommended alternatives (functionally compatible with specified parameter variations).

Parameter Comparison

Engineering Selection Recommendations

Parametric Equivalents (Direct Replacement):

TPS2045ADR is the direct parametric equivalent to TPS2045ADRG4, differing only in packaging format (Tape & Reel vs. standard). This part maintains identical electrical specifications and is currently in active production status with higher inventory availability (4269 pcs).

TPS2055ADR provides equivalent electrical performance with non-inverting input logic. Selection depends on circuit design requirements for input signal polarity. This part is active with substantial inventory (5628 pcs).

Manufacturer-Recommended Alternatives:

AP2141SG-13, AP2161SG-13, and AP2181SG-13 (Diodes Incorporated) are manufacturer-recommended substitutes with the following considerations:

• All three parts feature P-Channel output topology, requiring circuit redesign if N-Channel functionality is mandatory
• Current ratings exceed the original specification (500mA, 1A, and 1.5A respectively), providing design margin
• Operating temperature range extends to -40°C, supporting broader environmental applications
• Enhanced fault protection includes Reverse Current protection
• All parts maintain ROHS3 compliance and MSL Level 1 certification
• All parts are in active production with substantial inventory levels

Selection among AP2141SG-13, AP2161SG-13, and AP2181SG-13 depends on required output current capacity and input logic polarity requirements.

Frequently Asked Questions (FAQ)

Q: Can TPS2045ADR directly replace TPS2045ADRG4?

A: Yes. TPS2045ADR is a parametric equivalent with identical electrical specifications. The difference is packaging format (Tape & Reel). Both are 8-SOIC packages with the same pin configuration and electrical performance.

Q: What is the difference between TPS2045ADR and TPS2055ADR?

A: Both parts are N-Channel power switches with identical voltage, current, and protection specifications. The primary difference is input logic type: TPS2045ADR uses inverting input, while TPS2055ADR uses non-inverting input. Selection depends on your circuit's control signal polarity.

Q: Why are the Diodes Incorporated parts (AP2141SG-13, AP2161SG-13, AP2181SG-13) listed as substitutes if they use P-Channel output?

A: These parts are manufacturer-recommended alternatives for applications where P-Channel topology is acceptable. They provide higher current ratings (500mA to 1.5A) and extended operating temperature range (-40°C to 85°C). Circuit redesign is required if N-Channel output is mandatory.

Q: What are the key differences between AP2141SG-13, AP2161SG-13, and AP2181SG-13?

A: All three are P-Channel power switches with identical voltage specifications and 95mOhm Rds On. Differences are: AP2141SG-13 provides 500mA with non-inverting input; AP2161SG-13 provides 1A with inverting input; AP2181SG-13 provides 1.5A with inverting input. Selection depends on required output current and input logic requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (TPS2045ADR, TPS2055ADR, AP2141SG-13, AP2161SG-13, AP2181SG-13) are ROHS3 compliant with MSL Level 1 (Unlimited moisture sensitivity level).

Q: What is the package difference between 8-SOIC and 8-SOP?

A: Both are 8-pin surface-mount packages with 0.154" (3.90mm) width. 8-SOIC and 8-SOP are functionally equivalent for PCB layout purposes. Pin configuration and spacing are compatible for direct substitution.

Q: Which substitute part should I select if I need the highest current capacity?

A: AP2181SG-13 provides the highest current rating at 1.5A. This part requires P-Channel circuit topology and uses inverting input logic. Verify your circuit design accommodates these specifications before selection.