TPS2056ADRG4 Equivalent & Substitute Parts

Part Overview

The TPS2056ADRG4 is a Power Switch/Driver IC from Texas Instruments, configured as a 1:2 N-Channel high-side switch with 250mA output current capability in an 8-SOIC package. This component is designed for general-purpose power switching applications requiring dual-output control with integrated current limiting, over-temperature protection, and under-voltage lockout (UVLO).

The TPS2056ADRG4 is discontinued at DiGi Electronics. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements.

Key Parameters

Parameter	TPS2056ADRG4 Value
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Switch Type	General Purpose
Number of Outputs	2
Ratio - Input:Output	1:2
Output Type	N-Channel
Output Configuration	High Side
Voltage - Load	2.7V ~ 5.5V
Current - Output (Max)	250mA
Rds On (Typ)	80mOhm
Input Type	Non-Inverting
Fault Protection	Current Limiting (Fixed), Over Temperature, UVLO
Operating Temperature	0°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the TPS2056ADRG4 is determined by the following critical parameters:

Number of Outputs: 2 (dual-output configuration)
Ratio - Input:Output: 1:2 (one input controls two outputs)
Output Type: N-Channel (channel type must match)
Output Configuration: High Side (switching topology)
Voltage - Load Range: 2.7V ~ 5.5V (operating voltage compatibility)
Current - Output (Max): 250mA minimum (current handling capability)
Rds On (Typ): 80mOhm (on-resistance specification)
Package / Case: 8-SOIC form factor (physical compatibility)
Fault Protection: Current Limiting, Over Temperature, UVLO (protection features)

Substitute parts are grouped into two categories:

Parametric Equivalents (Texas Instruments TPS20xx series): Parts with matching electrical specifications and package form factor, differing primarily in input logic (inverting vs. non-inverting) or product status.

Manufacturer Recommended Alternatives (Diodes Incorporated AP21xx series and Rohm Semiconductor BD2066): Parts with compatible 1:2 output configuration and dual-output topology, with enhanced current ratings (500mA to 1.5A) and extended temperature ranges, suitable for applications requiring higher performance margins.

Parameter Comparison

Parameter	TPS2056ADRG4	TPS2045ADR	TPS2046ADR	TPS2055ADR	TPS2090DR	TPS2092DR	AP2152SG-13	AP2192SG-13	BD2066FJ-LBE2
Manufacturer	TI	TI	TI	TI	TI	TI	Diodes Inc.	Diodes Inc.	Rohm
Number of Outputs	2	1	2	1	2	2	2	2	2
Ratio - Input:Output	1:2	1:1	1:1	1:1	1:1	1:1	1:2	1:2	1:2
Output Type	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	N-Channel	P-Channel	P-Channel	N-Channel
Voltage - Load	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V
Current - Output (Max)	250mA	250mA	250mA	250mA	250mA	250mA	500mA	1.5A	1.5A
Rds On (Typ)	80mOhm	80mOhm	80mOhm	80mOhm	80mOhm	80mOhm	120mOhm	120mOhm	80mOhm
Input Type	Non-Inverting	Inverting	Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting	Non-Inverting
Fault Protection	Current Limiting, Over Temp, UVLO	Current Limiting, Over Temp, UVLO	Current Limiting, Over Temp, UVLO	Current Limiting, Over Temp, UVLO	Current Limiting, Over Temp, UVLO	Current Limiting, Over Temp, UVLO	Current Limiting, Over Temp, Reverse Current, UVLO	Current Limiting, Over Temp, Reverse Current, UVLO	Current Limiting, Over Temp, Reverse Current, UVLO
Operating Temperature	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 85°C	0°C ~ 125°C	0°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOP	8-SOP	8-SOP-J
Product Status	Discontinued	Active	Discontinued	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Parametric Equivalents (Preferred for Pin-Compatible Replacement)

TPS2055ADR is the closest parametric equivalent to TPS2056ADRG4. Both parts share identical electrical specifications (1:2 output ratio, N-Channel, 250mA, 80mOhm Rds On, 8-SOIC package) with the primary difference being input logic type (non-inverting for both). TPS2055ADR is currently in active production status with 5,628 units in stock, ensuring supply continuity. This part is suitable for direct substitution in applications where the non-inverting input logic is compatible with existing circuit design.

TPS2090DR and TPS2092DR are active Texas Instruments alternatives with extended operating temperature range (0°C ~ 125°C) and integrated status flag functionality. Both maintain the 1:2 output configuration, N-Channel topology, and 8-SOIC package. These parts are suitable for applications requiring enhanced thermal performance or status monitoring capability.

Higher-Performance Alternatives (Enhanced Current Capability)

AP2192SG-13 (Diodes Incorporated) and BD2066FJ-LBE2 (Rohm Semiconductor) provide 1.5A output current capability compared to the 250mA specification of TPS2056ADRG4. Both maintain the 1:2 output configuration, high-side switching topology, and 2.7V ~ 5.5V load voltage range. These parts include reverse current protection and extended temperature ranges (-40°C ~ 85°C), making them suitable for applications requiring higher current margins or wider operating temperature specifications. BD2066FJ-LBE2 maintains N-Channel output type matching the original part, while AP2192SG-13 uses P-Channel topology requiring circuit redesign considerations.

Product Status Considerations

All recommended substitute parts maintain active production status except TPS2046ADR (discontinued). TPS2055ADR, TPS2090DR, TPS2092DR, AP2152SG-13, AP2192SG-13, and BD2066FJ-LBE2 are all currently in active production with confirmed inventory availability, ensuring long-term supply chain reliability.

All substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, consistent with the original TPS2056ADRG4 specification.

Frequently Asked Questions (FAQ)

Q: Can TPS2055ADR directly replace TPS2056ADRG4 in existing designs?

A: TPS2055ADR is a parametric equivalent with matching electrical specifications and 8-SOIC package form factor. Both parts feature non-inverting input logic, identical 1:2 output ratio, N-Channel topology, 250mA current rating, and 80mOhm on-resistance. Direct PCB substitution is feasible without circuit modification. Verify pinout compatibility with device datasheets before implementation.

Q: What is the difference between 1:1 and 1:2 output ratio configurations?

A: The ratio describes the relationship between input control signals and output switches. A 1:2 ratio means one input signal controls two independent output switches, as in TPS2056ADRG4. A 1:1 ratio means one input controls one output. For applications requiring dual-output control from a single input, only 1:2 configured parts (TPS2056ADRG4, TPS2046ADR, AP2152SG-13, AP2192SG-13, BD2066FJ-LBE2) are suitable substitutes.

Q: Why do some substitute parts have higher current ratings (500mA to 1.5A) than the original 250mA specification?

A: Higher current-rated parts provide design margin for applications with variable load conditions or future design iterations. AP2152SG-13 (500mA) and AP2192SG-13 and BD2066FJ-LBE2 (1.5A) are backward-compatible with 250mA load requirements while offering enhanced performance headroom. These parts are suitable for applications where current demand may increase or where thermal margin is critical.

Q: What is the significance of N-Channel versus P-Channel output type?

A: N-Channel and P-Channel refer to the type of transistor used for output switching, affecting circuit topology and control logic. TPS2056ADRG4 uses N-Channel (high-side switching). AP2152SG-13 and AP2192SG-13 use P-Channel topology, requiring circuit redesign including control signal inversion and load connection modifications. BD2066FJ-LBE2 maintains N-Channel topology, enabling direct functional substitution.

Q: Are there package compatibility considerations between 8-SOIC and 8-SOP variants?

A: 8-SOIC and 8-SOP are distinct surface-mount packages with different physical dimensions and pin spacing. TPS2056ADRG4 uses 8-SOIC (0.154" width). AP2152SG-13 and AP2192SG-13 use 8-SOP, while BD2066FJ-LBE2 uses 8-SOP-J. These packages are not mechanically interchangeable on the same PCB footprint. Verify PCB layout compatibility and consider re-layout requirements if substituting with different package types.

Q: What protection features are included in substitute parts?

A: All substitute parts include current limiting (fixed threshold), over-temperature protection, and under-voltage lockout (UVLO). AP2152SG-13, AP2192SG-13, and BD2066FJ-LBE2 additionally include reverse current protection, providing enhanced fault tolerance for applications with potential back-feed conditions. TPS2090DR and TPS2092DR include integrated status flag output for fault monitoring.

Q: How do extended operating temperature ranges affect part selection?

A: TPS2090DR and TPS2092DR support 0°C ~ 125°C (junction temperature), compared to TPS2056ADRG4's 0°C ~ 85°C (ambient temperature). AP2152SG-13, AP2192SG-13, and BD2066FJ-LBE2 support -40°C ~ 85°C (ambient temperature). Extended temperature ranges are necessary for applications in industrial, automotive, or high-temperature environments. Standard temperature-rated parts are sufficient for consumer and commercial applications within 0°C ~ 85°C ambient conditions.

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