TPS2042ADRG4 Equivalent & Substitute Parts

Part Overview

The TPS2042ADRG4 is an N-Channel power switch driver from Texas Instruments designed for general-purpose load switching applications. This 8-SOIC surface-mount device provides 1:2 output configuration with 500mA maximum output current and operates across a 2.7V to 5.5V load voltage range. The part is discontinued at DiGi Electronics, making equivalent and substitute parts essential for ongoing design support and production continuity. Alternative components maintain core electrical specifications while offering active product status and improved availability.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	TPS2042ADRG4
Category	Power Management (PMIC)
Package	8-SOIC (0.154", 3.90mm Width)
Switch Type	General Purpose
Output Configuration	High Side, N-Channel
Number of Outputs	2
Voltage - Load	2.7V ~ 5.5V
Current - Output (Max)	500mA
Rds On (Typ)	80mOhm
Input Type	Inverting
Fault Protection	Current Limiting (Fixed), Over Temperature, UVLO
Operating Temperature	0°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution for the TPS2042ADRG4 is determined by the following critical parameters:

Primary Substitution Criteria:

Output configuration (High Side, N-Channel)
Number of outputs (2)
Load voltage range (2.7V ~ 5.5V)
Maximum output current (500mA minimum)
On-resistance (80mOhm typical)
Fault protection features (Current Limiting, Over Temperature, UVLO)
Package type (8-SOIC surface mount)
Input logic type (Inverting vs. Non-Inverting)

Substitution Categories:

Direct Manufacturer Equivalent (MFR Recommended): TPS2042ADR maintains identical electrical specifications and packaging. This part differs only in packaging format (Tape & Reel vs. Digi-Reel) and is actively produced by Texas Instruments.

Parametric Equivalents (Texas Instruments Family): TPS2041ADR, TPS2051ADR, TPS2052ADR, TPS2080DR, and TPS2082DR share core electrical parameters but differ in output configuration (1 vs. 2 outputs), input logic type (Inverting vs. Non-Inverting), or operating temperature range. These parts maintain the same load voltage, current rating, on-resistance, and fault protection architecture.

Cross-Manufacturer Alternatives (Diodes Incorporated): AP2142SG-13, AP2162SG-13, and AP2182SG-13 provide functional equivalence with different channel type (P-Channel vs. N-Channel), higher current ratings (500mA to 1.5A), and extended temperature ranges. These parts require circuit topology evaluation due to channel polarity differences.

Parameter Comparison

Part Number	Manufacturer	Outputs	Channel Type	Input Type	Current (Max)	Rds On (Typ)	Temp Range	Status	Inventory
TPS2042ADRG4	Texas Instruments	2	N-Channel	Inverting	500mA	80mOhm	0°C ~ 85°C	Discontinued	2282 Pcs
TPS2042ADR	Texas Instruments	2	N-Channel	Inverting	500mA	80mOhm	0°C ~ 85°C	Active	11492 Pcs
TPS2041ADR	Texas Instruments	1	N-Channel	Inverting	500mA	80mOhm	0°C ~ 85°C	Active	7900 Pcs
TPS2051ADR	Texas Instruments	1	N-Channel	Non-Inverting	500mA	80mOhm	0°C ~ 85°C	Active	8973 Pcs
TPS2052ADR	Texas Instruments	2	N-Channel	Non-Inverting	500mA	80mOhm	0°C ~ 85°C	Active	8473 Pcs
TPS2080DR	Texas Instruments	2	N-Channel	Non-Inverting	500mA	80mOhm	0°C ~ 125°C	Active	35200 Pcs
TPS2082DR	Texas Instruments	2	N-Channel	Non-Inverting	500mA	80mOhm	0°C ~ 125°C	Active	4630 Pcs
AP2142SG-13	Diodes Incorporated	2	P-Channel	Non-Inverting	500mA	120mOhm	-40°C ~ 85°C	Active	18412 Pcs
AP2162SG-13	Diodes Incorporated	2	P-Channel	Non-Inverting	1A	Not Specified	-40°C ~ 85°C	Active	5440 Pcs
AP2182SG-13	Diodes Incorporated	2	P-Channel	Non-Inverting	1.5A	120mOhm	-40°C ~ 85°C	Active	2048 Pcs

Engineering Selection Recommendations

First Priority - Direct Equivalent: TPS2042ADR is the primary substitute. It maintains identical electrical and functional specifications with active product status and superior inventory availability (11492 units). This part requires no circuit redesign and provides direct pin-for-pin compatibility.

Secondary Priority - Texas Instruments Family (Same Channel Type): TPS2052ADR and TPS2080DR are suitable alternatives when input logic inversion is acceptable in the circuit design. Both maintain N-Channel high-side switching with 500mA output current and 80mOhm on-resistance. TPS2080DR offers extended operating temperature range (0°C ~ 125°C) and highest inventory availability (35200 units). TPS2041ADR and TPS2051ADR are applicable only in single-output configurations.

Tertiary Priority - Cross-Manufacturer Alternatives: AP2142SG-13, AP2162SG-13, and AP2182SG-13 from Diodes Incorporated provide functional power switching capability but require circuit topology evaluation due to P-Channel polarity. These parts are suitable only for applications where P-Channel high-side switching is compatible with existing design architecture. Higher current ratings (1A to 1.5A) provide design margin for increased load requirements.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity levels range from MSL 1 (Unlimited) to MSL 3 (168 Hours), affecting storage and handling requirements. Extended temperature range variants (TPS2080DR, TPS2082DR) support industrial applications requiring 0°C ~ 125°C operation.

Frequently Asked Questions (FAQ)

Q: Can TPS2042ADR directly replace TPS2042ADRG4? A: Yes. TPS2042ADR is the manufacturer-recommended equivalent with identical electrical specifications, package type, and pin configuration. The only difference is packaging format (Tape & Reel vs. Digi-Reel). No circuit modifications are required.

Q: What is the difference between inverting and non-inverting input types? A: Inverting input (TPS2042ADRG4, TPS2042ADR, TPS2041ADR) activates the output when the input signal is low. Non-inverting input (TPS2051ADR, TPS2052ADR, TPS2080DR, TPS2082DR) activates the output when the input signal is high. Circuit logic must be evaluated to determine compatibility.

Q: Can I use a single-output part (TPS2041ADR or TPS2051ADR) instead of a dual-output part? A: Only if your application requires switching a single load. Single-output parts provide one switched output instead of two. Verify that your circuit design does not require dual independent switching channels.

Q: Why do TPS2080DR and TPS2082DR have higher operating temperature ranges? A: These parts are rated for junction temperatures up to 125°C (TJ) compared to 85°C (TA) for other variants. This extended range supports industrial and automotive applications with higher ambient temperature requirements.

Q: Are Diodes Incorporated parts (AP2142SG-13, AP2162SG-13, AP2182SG-13) compatible? A: These parts provide functional power switching equivalence but use P-Channel topology instead of N-Channel. Circuit redesign is required to accommodate the different channel polarity. Evaluate your load switching architecture before selection.

Q: What is the significance of the 80mOhm on-resistance specification? A: On-resistance (Rds On) determines power dissipation and voltage drop across the switch. The 80mOhm typical value is consistent across most Texas Instruments substitutes. Diodes Incorporated parts specify 120mOhm, resulting in higher power dissipation at equivalent current levels.

Q: How does inventory availability affect my selection? A: TPS2080DR has the highest inventory (35200 units), followed by TPS2042ADR (11492 units). For discontinued parts, higher inventory availability reduces supply chain risk and lead time. Verify current stock levels with your distributor.

Q: What packaging considerations apply to these parts? A: All parts use 8-SOIC surface-mount packages with 0.154" width (3.90mm). Packaging format differences (Tape & Reel, Cut Tape, Digi-Reel) affect handling and assembly but not electrical performance or pin compatibility.

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