TPS2031DR Equivalent & Substitute Parts

Part Overview

The TPS2031DR 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 600mA output current with a 33mOhm on-resistance and operates across a 2.7V to 5.5V load voltage range. The device includes integrated status flag output, current limiting, over-temperature protection, and under-voltage lockout (UVLO). With active product status and ROHS3 compliance, the TPS2031DR serves as a standard component in power management circuits requiring reliable switching control.

Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, packaging preferences, or specific application qualifications such as automotive-grade certifications.

Substiute Parts

TPS2031DR

Texas InstrumentsIn Stock: 65926TPS2031DR Datasheet

Current PartRFQ

TPS2021DR

Texas InstrumentsIn Stock: 1597TPS2021DR Datasheet

Parametric EquivalentRFQ

TPS2021IDRQ1

Texas InstrumentsIn Stock: 3728TPS2021IDRQ1 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 TPS2031DR are classified into two categories based on electrical and mechanical compatibility:

Parametric Equivalents (Direct Substitutes): Parts that maintain identical electrical specifications across all critical parameters including output type (N-Channel), load voltage range (2.7V ~ 5.5V), output current (600mA), on-resistance (33mOhm), and protection features. These parts differ only in input logic type or packaging format but remain functionally interchangeable in most applications.

Manufacturer Recommended Alternatives: Parts that differ in output type (P-Channel vs. N-Channel) or current rating but share the same load voltage range, 1:1 ratio, high-side configuration, and core protection features. These substitutes require circuit topology verification due to channel type differences.

The following parameters determine substitution validity:

• Load voltage range: 2.7V ~ 5.5V (must match)
• Ratio - Input:Output: 1:1 (must match)
• Output configuration: High Side (must match)
• Number of outputs: 1 (must match)
• Fault protection: Current Limiting, Over Temperature, UVLO (must include all three)
• Package footprint: 8-SOIC compatible (must match)
• Interface: On/Off (must match)

Parameter Comparison

Engineering Selection Recommendations

TPS2021DR and TPS2021IDRQ1: These Texas Instruments N-Channel alternatives maintain identical electrical performance to the TPS2031DR with 600mA output current and 33mOhm on-resistance. The primary difference is input logic inversion, requiring circuit-level verification of control signal polarity. TPS2021IDRQ1 includes AEC-Q100 automotive qualification and is suitable for automotive-grade applications. Both parts are active products with ROHS3 compliance and unlimited moisture sensitivity rating.

AP2151SG-13: This Diodes Incorporated P-Channel substitute operates within the same 2.7V to 5.5V load voltage range with integrated status flag and comprehensive fault protection including reverse current blocking. Output current is rated at 500mA with 95mOhm on-resistance. The P-Channel topology requires circuit redesign compared to the N-Channel TPS2031DR. Operating temperature range is -40°C to 85°C. This part is active and ROHS3 compliant with unlimited moisture sensitivity.

AP2171SG-13: This Diodes Incorporated P-Channel alternative provides 1A output current with 95mOhm on-resistance, supporting higher current applications within the same 2.7V to 5.5V load voltage range. P-Channel topology and non-inverting input logic match the AP2151SG-13 family. Operating temperature is -40°C to 85°C. Moisture sensitivity level is 3 (168 hours). Active product status and ROHS3 compliance are maintained.

AP2191SG-13: This Diodes Incorporated P-Channel option delivers the highest output current at 1.5A with 95mOhm on-resistance across the 2.7V to 5.5V load voltage range. P-Channel configuration and non-inverting input logic are consistent with other Diodes alternatives. Operating temperature range is -40°C to 85°C. This part maintains active status, ROHS3 compliance, and unlimited moisture sensitivity rating.

Frequently Asked Questions (FAQ)

Q: Can TPS2021DR directly replace TPS2031DR without circuit modification?

A: TPS2021DR is electrically equivalent in current rating, on-resistance, and protection features but features inverting input logic compared to the non-inverting TPS2031DR. Direct substitution requires verification that control signal polarity is compatible with the application circuit. If the control signal is already inverted in the system, substitution is valid without modification.

Q: What is the key difference between N-Channel (TPS2031DR, TPS2021DR) and P-Channel (AP2151SG-13, AP2171SG-13, AP2191SG-13) alternatives?

A: N-Channel and P-Channel devices have fundamentally different circuit topologies. N-Channel switches pull the output to ground when activated, while P-Channel switches pull the output to the supply voltage when activated. Circuit redesign is required when switching between channel types. The load voltage range (2.7V ~ 5.5V) and protection features remain consistent across both types.

Q: Is TPS2021IDRQ1 suitable for automotive applications?

A: Yes. TPS2021IDRQ1 carries AEC-Q100 automotive qualification and is rated for automotive-grade use. It maintains the same electrical specifications as TPS2021DR (600mA, 33mOhm, inverting input) with extended reliability validation for automotive environments.

Q: How do output current ratings affect substitution?

A: The TPS2031DR is rated for 600mA maximum output current. AP2151SG-13 provides 500mA, while AP2171SG-13 and AP2191SG-13 provide 1A and 1.5A respectively. Substitution with lower current ratings (AP2151SG-13 at 500mA) is valid only if the application load current does not exceed 500mA. Higher current-rated parts (AP2171SG-13, AP2191SG-13) are suitable for applications requiring up to 1A or 1.5A respectively.

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

A: MSL indicates moisture absorption limits during storage and handling. TPS2031DR, TPS2021DR, TPS2021IDRQ1, AP2151SG-13, and AP2191SG-13 are rated MSL 1 (unlimited moisture exposure tolerance). AP2171SG-13 is rated MSL 3, requiring storage in dry conditions and limiting moisture exposure to 168 hours before reflow soldering. MSL 1 parts offer greater handling flexibility in manufacturing environments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (TPS2021DR, TPS2021IDRQ1, AP2151SG-13, AP2171SG-13, AP2191SG-13) maintain ROHS3 compliance, matching the TPS2031DR environmental standard.

Q: What packaging options are available?

A: TPS2031DR is supplied in Cut Tape (CT) & Digi-Reel® format. TPS2021DR and AP2171SG-13 also offer Cut Tape & Digi-Reel® packaging. TPS2021IDRQ1, AP2151SG-13, and AP2191SG-13 are supplied in Tape & Reel (TR) format. All parts use 8-SOIC or 8-SOP package footprints compatible with standard surface-mount assembly processes.