TPS2551DRVR Equivalent & Substitute Parts

Part Overview

The TPS2551DRVR is a Power Switch/Driver IC manufactured by Texas Instruments, designed for general-purpose high-side N-channel switching applications. This component operates as a 1:1 power switch with 1.1A maximum output current and is housed in a 6-WSON (2x2) package. The part carries a "Not For New Designs" status, making identification of functionally equivalent alternatives essential for ongoing production and design updates.

Substiute Parts

TPS2551DRVR

Texas InstrumentsIn Stock: 22887TPS2551DRVR Datasheet

Current PartRFQ

TPS2550DRVT

Texas InstrumentsIn Stock: 2963TPS2550DRVT Datasheet

Parametric EquivalentRFQ

TPS2551DRVT

Texas InstrumentsIn Stock: 1295TPS2551DRVT Datasheet

Parametric EquivalentRFQ

MIC2019YML-TR

Microchip TechnologyIn Stock: 6060MIC2019YML-TR Datasheet

MFR RecommendedRFQ

RT9728AHGQW

Richtek USA Inc.In Stock: 9454RT9728AHGQW Datasheet

MFR RecommendedRFQ

RT9728AHZQW

Richtek USA Inc.In Stock: 35391RT9728AHZQW Datasheet

MFR RecommendedRFQ

RT9728ALZQW

Richtek USA Inc.In Stock: 15626RT9728ALZQW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS2551DRVR is determined by the following critical parameters:

• Output Type & Configuration: High-side switching topology (N-channel or P-channel)
• Voltage Range: Load voltage compatibility within 2.5V ~ 6.5V (or subset thereof)
• Current Rating: Maximum output current of 1.1A or greater
• On-Resistance (Rds On): Typical value of 100mOhm or lower for thermal and efficiency equivalence
• Package Compatibility: 6-WSON/6-WDFN (2x2) form factor for PCB layout compatibility
• Fault Protection: Current limiting, over-temperature, and UVLO protection presence
• Interface Type: On/Off control with non-inverting input logic

Substitute parts are grouped into two categories:

Parametric Equivalents (Texas Instruments TPS Series): TPS2550DRVT and TPS2551DRVT maintain identical electrical specifications, output type (N-channel), and package footprint. These parts differ only in packaging format (Tape & Reel) and inventory status.

Manufacturer-Recommended Alternatives (Cross-Topology Substitutes): MIC2019YML-TR (Microchip), RT9728AHGQW, RT9728AHZQW, and RT9728ALZQW (Richtek) provide functional equivalence with modified electrical characteristics. These parts employ P-channel output topology instead of N-channel, resulting in different load voltage ranges and current ratings. Selection requires circuit topology verification.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical & Mechanical Specifications):

TPS2550DRVT and TPS2551DRVT are direct parametric equivalents to TPS2551DRVR. Both maintain N-channel output topology, identical voltage and current ratings, and matching package footprints. Selection between these three parts should be based on packaging availability (Tape & Reel vs. bulk) and inventory status. All three carry "Not For New Designs" status from Texas Instruments.

For Active Product Designs:

MIC2019YML-TR, RT9728AHGQW, RT9728AHZQW, and RT9728ALZQW are active products suitable for new designs. These parts require circuit topology evaluation due to P-channel output configuration. The Richtek RT9728 series offers additional status flag functionality and UVLO protection. MIC2019YML-TR provides superior on-resistance (70mOhm) and higher current capacity (2A), though operating temperature is limited to -40°C ~ 85°C. Richtek parts maintain the extended temperature range of the original TPS2551DRVR (-40°C ~ 85°C TA) and include UVLO protection.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and REACH unaffected status. Moisture sensitivity differs: TPS series parts carry MSL 1 (unlimited), while Richtek parts carry MSL 3 (168 hours). This affects storage and handling requirements for high-humidity environments.

Frequently Asked Questions (FAQ)

Q: Can TPS2550DRVT and TPS2551DRVT be used as direct replacements for TPS2551DRVR?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, output type (N-channel), voltage range (2.5V ~ 6.5V), current rating (1.1A), on-resistance (100mOhm), and package footprint (6-WDFN). The only differences are packaging format and inventory status.

Q: Why do the Richtek and Microchip alternatives have different output types (P-channel vs. N-channel)?

A: P-channel and N-channel topologies serve different circuit configurations. P-channel high-side switches are used in applications where the load is connected to ground, while N-channel high-side switches require a charge pump or bootstrap circuit. Circuit topology must be verified before selecting a P-channel substitute.

Q: What is the impact of different on-resistance values?

A: On-resistance directly affects power dissipation and thermal performance. MIC2019YML-TR (70mOhm) dissipates less heat than TPS2551DRVR (100mOhm) at equivalent current levels. Richtek parts (120mOhm) dissipate slightly more heat. Thermal analysis is required for applications operating near maximum current ratings.

Q: Are there temperature range limitations with substitute parts?

A: TPS2551DRVR operates to 150°C junction temperature. MIC2019YML-TR and Richtek alternatives are limited to 85°C ambient temperature. For applications requiring extended temperature operation, TPS2550DRVT or TPS2551DRVT remain the only suitable options.

Q: What does "Not For New Designs" status mean?

A: This designation indicates the manufacturer is discontinuing the product line. Existing designs may continue using these parts, but new designs should transition to active alternatives. MIC2019YML-TR, RT9728AHGQW, RT9728AHZQW, and RT9728ALZQW carry active product status.

Q: How does moisture sensitivity level affect component handling?

A: MSL 1 (TPS series) allows unlimited shelf life without special storage. MSL 3 (Richtek series) requires controlled humidity storage and limits shelf life to 168 hours after bag opening. High-humidity manufacturing environments may require additional desiccant handling for Richtek parts.

Q: Can current capacity differences affect circuit performance?

A: Yes. MIC2019YML-TR (2A) and RT9728 series (1.3A) exceed TPS2551DRVR (1.1A) capacity, allowing operation at higher load currents or improved thermal margin. However, circuit design must account for different on-resistance values and protection thresholds.