TPS2033DR Equivalent & Substitute Parts

Part Overview

The TPS2033DR is an active N-Channel power switch/driver manufactured by Texas Instruments, designed for general-purpose high-side switching applications. This 8-SOIC surface-mount device delivers 1.5A maximum output current with a 33mOhm on-resistance and includes integrated fault protection features including current limiting, over-temperature protection, and under-voltage lockout (UVLO). The device operates across a 2.7V to 5.5V load voltage range with a non-inverting input interface and status flag output.

The TPS2033DR maintains active product status with 6,120 units in current inventory. Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and fault protection capabilities to support design flexibility and supply chain continuity.

Substiute Parts

TPS2033DR

Texas InstrumentsIn Stock: 6166TPS2033DR Datasheet

Current PartRFQ

TPS2023DR

Texas InstrumentsIn Stock: 2654TPS2023DR 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

Substitute parts for the TPS2033DR are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Output Configuration: High Side
• Number of Outputs: 1
• Ratio - Input:Output: 1:1
• Voltage - Load Range: 2.7V ~ 5.5V
• Package Type: 8-SOIC form factor
• Fault Protection: Current Limiting, Over Temperature, UVLO
• Interface: On/Off control

Substitution Categories:

Parametric Equivalent: TPS2023DR (Texas Instruments) matches all electrical specifications and package requirements. The primary distinction is input logic type (Inverting vs. Non-Inverting), which requires circuit-level evaluation for compatibility.

Manufacturer Recommended Alternatives: AP2151SG-13, AP2171SG-13, and AP2191SG-13 (Diodes Incorporated) provide functional substitution with the following trade-offs:

• Output Type: P-Channel (vs. N-Channel in TPS2033DR)
• Current Rating: 500mA (AP2151SG-13) or 1A (AP2171SG-13) or 1.5A (AP2191SG-13)
• On-Resistance: 95mOhm (vs. 33mOhm in TPS2033DR)
• Operating Temperature: -40°C ~ 85°C (TA) for AP2151SG-13 and AP2171SG-13; -40°C ~ 85°C (TA) for AP2191SG-13
• Additional Protection: Reverse Current protection included

Parameter Comparison

Engineering Selection Recommendations

TPS2023DR (Parametric Equivalent): This Texas Instruments device provides identical electrical performance and package compatibility to the TPS2033DR. Selection requires circuit-level analysis of the inverting input logic to confirm compatibility with existing control signal conditioning. Both devices maintain ROHS3 compliance, MSL 1 rating, and active product status.

AP2191SG-13 (Recommended Primary Substitute): This Diodes Incorporated device matches the 1.5A output current rating and maintains the 8-SOIC package footprint. The P-Channel topology requires circuit redesign for high-side switching applications. The device includes additional reverse current protection and maintains ROHS3 compliance with MSL 1 rating. Operating temperature range is -40°C to 85°C (TA), which is suitable for most industrial and commercial applications. Highest inventory availability (72,504 units) supports supply chain continuity.

AP2171SG-13 (Secondary Substitute): This device provides 1A output current with P-Channel topology and includes reverse current protection. The MSL 3 rating (168 hours) requires controlled storage conditions. Operating temperature range is -40°C to 85°C (TA). Suitable for applications where 1A current capacity is sufficient.

AP2151SG-13 (Limited Substitution): This device provides 500mA output current, which is below the TPS2033DR 1.5A specification. Selection is appropriate only for applications with reduced current requirements. P-Channel topology and reverse current protection are included. Operating temperature range is -40°C to 85°C (TA).

Frequently Asked Questions (FAQ)

Q: Can TPS2023DR directly replace TPS2033DR in existing designs?

A: TPS2023DR provides identical electrical specifications and package compatibility. The primary difference is input logic type: TPS2023DR uses inverting logic while TPS2033DR uses non-inverting logic. Direct replacement requires verification that control signal conditioning is compatible with inverting input requirements.

Q: What are the key differences between N-Channel (TPS2033DR) and P-Channel (AP series) devices?

A: N-Channel and P-Channel topologies require different circuit configurations for high-side switching. N-Channel devices (TPS2033DR, TPS2023DR) require gate drive voltage above the load voltage. P-Channel devices (AP2191SG-13, AP2171SG-13, AP2151SG-13) require gate drive voltage below the load voltage. Circuit redesign is necessary for topology conversion.

Q: Which substitute provides the best current capacity match?

A: AP2191SG-13 matches the 1.5A output current rating of TPS2033DR. This device maintains the same current specification while providing additional reverse current protection and superior inventory availability.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. TPS2033DR, TPS2023DR, AP2191SG-13, AP2171SG-13, and AP2151SG-13 are all ROHS3 compliant and REACH unaffected.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: MSL 1 (Unlimited) devices have no moisture sensitivity restrictions and can be stored indefinitely. MSL 3 (168 Hours) devices, such as AP2171SG-13, require controlled storage conditions and must be used within 168 hours of package opening. TPS2033DR, TPS2023DR, AP2191SG-13, and AP2151SG-13 carry MSL 1 ratings.

Q: How do operating temperature ranges affect substitution decisions?

A: TPS2033DR operates to 125°C (junction temperature), while Diodes Incorporated alternatives operate to 85°C (ambient temperature). For applications requiring operation above 85°C ambient, TPS2033DR or TPS2023DR are required. For standard industrial and commercial temperature ranges (-40°C to 85°C), all substitutes are suitable.

Q: What is the impact of on-resistance (Rds On) differences?

A: TPS2033DR and TPS2023DR specify 33mOhm on-resistance, while AP series devices specify 95mOhm. Higher on-resistance increases power dissipation and heat generation. For applications with high switching frequency or continuous current operation, the lower on-resistance of TPS2033DR/TPS2023DR is preferred.

Q: Can AP2151SG-13 (500mA) be used in place of TPS2033DR (1.5A)?

A: AP2151SG-13 is suitable only for applications where maximum output current does not exceed 500mA. Use in higher-current applications will result in device thermal shutdown and circuit malfunction.