TPS2551DBVT Equivalent & Substitute Parts

Part Overview

The TPS2551DBVT is a power switch driver IC from Texas Instruments, classified as a general-purpose N-channel high-side switch in the Power Management (PMIC) category. This device delivers 1.1A maximum output current with adjustable current limiting, over-temperature protection, and UVLO (Under-Voltage Lock-Out) fault protection. The part is marked as "Not For New Designs," indicating it has been superseded or is in end-of-life status. Alternative components are necessary for new product development or when inventory constraints require substitution.

Substiute Parts

TPS2551DBVT

Texas InstrumentsIn Stock: 3366TPS2551DBVT Datasheet

Current PartRFQ

TPS2550DBVT

Texas InstrumentsIn Stock: 3625TPS2550DBVT Datasheet

Parametric EquivalentRFQ

TPS2551DBVR

Texas InstrumentsIn Stock: 100308TPS2551DBVR Datasheet

Parametric EquivalentRFQ

TPS2551QDBVRQ1

Texas InstrumentsIn Stock: 889086TPS2551QDBVRQ1 Datasheet

Parametric EquivalentRFQ

MIC2009A-1YM6-TR

Microchip TechnologyIn Stock: 26187MIC2009A-1YM6-TR Datasheet

MFR RecommendedRFQ

MIC2019A-1YM6-TR

Microchip TechnologyIn Stock: 3206MIC2019A-1YM6-TR Datasheet

MFR RecommendedRFQ

MIC2019A-2YM6-TR

Microchip TechnologyIn Stock: 2366MIC2019A-2YM6-TR Datasheet

MFR RecommendedRFQ

MIC2019YM6-TR

Microchip TechnologyIn Stock: 6254MIC2019YM6-TR Datasheet

MFR RecommendedRFQ

NCP380HSNAJAAT1G

onsemiIn Stock: 437327NCP380HSNAJAAT1G Datasheet

MFR RecommendedRFQ

NCP380LSNAJAAT1G

onsemiIn Stock: 62427NCP380LSNAJAAT1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TPS2551DBVT is determined by the following critical parameters:

Primary Substitution Criteria:

• Output Type: N-Channel (for direct functional replacement)
• Output Configuration: High Side
• Package / Case: SOT-23-6 (mechanical compatibility)
• Voltage - Load: 2.5V ~ 6.5V (operating range compatibility)
• Current - Output (Max): ≥ 1.1A (current capacity requirement)
• Rds On (Typ): ≤ 85mOhm (on-resistance specification)
• Fault Protection: Current Limiting (Adjustable), Over Temperature, UVLO
• Interface: On/Off
• Input Type: Non-Inverting

Parametric Equivalent Parts (N-Channel, Direct Substitutes):

• TPS2550DBVT: Identical electrical specifications, different packaging (Tape & Reel vs. Cut Tape)
• TPS2551DBVR: Same base part number, different packaging variant (Cut Tape & Digi-Reel)
• TPS2551QDBVRQ1: Automotive-grade variant with AEC-Q100 qualification, identical electrical performance

Functional Equivalent Parts (P-Channel, Topology Change Required): The following parts operate as P-channel high-side switches and require circuit topology modification:

• MIC2009A-1YM6-TR: 900mA output, lower current capacity
• MIC2019A-1YM6-TR: 900mA output, lower current capacity
• MIC2019A-2YM6-TR: 900mA output, lower current capacity
• MIC2019YM6-TR: 2A output, higher current capacity
• NCP380HSNAJAAT1G: Adjustable current output, different package variant
• NCP380LSNAJAAT1G: Adjustable current output, different package variant

Parameter Comparison

Engineering Selection Recommendations

For Direct N-Channel Replacement (Recommended for Existing Designs):

TPS2551DBVR is the preferred direct substitute. It maintains identical electrical specifications (1.1A output, 85mOhm Rds On, 2.5V–6.5V load voltage range) and SOT-23-6 packaging. Both parts share "Not For New Designs" status, indicating equivalent lifecycle positioning. Packaging availability differs (Cut Tape & Digi-Reel vs. Tape & Reel variants), allowing flexibility based on procurement requirements.

TPS2550DBVT provides parametric equivalence with identical electrical performance but uses Tape & Reel packaging exclusively. This variant is suitable when reel-format components are preferred for automated assembly.

TPS2551QDBVRQ1 is the automotive-grade variant with AEC-Q100 qualification. This part is appropriate for automotive applications requiring functional safety compliance and extended temperature operation. It maintains identical electrical specifications while providing automotive-grade reliability assurance.

For Active Product Status (New Designs):

Microchip Technology MIC2019YM6-TR offers the highest current capacity (2A) among active alternatives with superior on-resistance (70mOhm vs. 85mOhm). This part requires P-channel topology implementation, necessitating circuit redesign. Operating temperature range is limited to -40°C ~ 85°C compared to the TPS2551DBVT's -40°C ~ 150°C.

onsemi NCP380LSNAJAAT1G provides adjustable current limiting with active product status and 70mOhm on-resistance. This part operates as a P-channel switch and requires topology modification. The adjustable current feature provides design flexibility for applications requiring programmable current thresholds.

Compliance Considerations:

All listed parts maintain ROHS3 compliance and EAR99 export classification. Moisture sensitivity levels vary: TPS2551 variants specify MSL 1 (Unlimited), while Microchip MIC2009A-1YM6-TR specifies MSL 2 (1 Year), requiring controlled storage conditions.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TPS2551DBVT with TPS2550DBVT?

A: Yes. Both parts are parametric equivalents with identical electrical specifications: 1.1A output current, 85mOhm on-resistance, 2.5V–6.5V load voltage range, and SOT-23-6 packaging. The primary difference is packaging format (Tape & Reel vs. Cut Tape & Digi-Reel). No circuit modifications are required.

Q: What is the difference between TPS2551DBVT and TPS2551QDBVRQ1?

A: TPS2551QDBVRQ1 is the automotive-grade variant with AEC-Q100 qualification. Electrical specifications are identical. The automotive variant is required for applications subject to automotive functional safety standards. Both parts are marked "Not For New Designs."

Q: Can I use MIC2019A-1YM6-TR as a direct replacement?

A: No. MIC2019A-1YM6-TR is a P-channel switch, whereas TPS2551DBVT is N-channel. This requires circuit topology modification. Additionally, MIC2019A-1YM6-TR has lower current capacity (900mA vs. 1.1A), higher on-resistance (170mOhm vs. 85mOhm), and narrower load voltage range (2.5V–5.5V vs. 2.5V–6.5V). Use only if circuit redesign is acceptable.

Q: Why is TPS2551DBVT marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life or has been superseded by newer alternatives. Existing inventory remains available, but Texas Instruments does not recommend this part for new product development. For new designs, consider active alternatives such as MIC2019YM6-TR or NCP380LSNAJAAT1G.

Q: What are the packaging differences between Cut Tape and Tape & Reel formats?

A: Cut Tape (CT) & Digi-Reel packaging supplies components in individual strips suitable for manual assembly or small-volume production. Tape & Reel (TR) packaging supplies components on continuous reels optimized for automated pick-and-place assembly. Electrical specifications are identical; selection depends on assembly process requirements.

Q: Can I use NCP380LSNAJAAT1G in place of TPS2551DBVT?

A: Substitution requires circuit redesign. NCP380LSNAJAAT1G is a P-channel switch with adjustable current limiting, whereas TPS2551DBVT is N-channel. Load voltage range is narrower (2.5V–5.5V vs. 2.5V–6.5V), and operating temperature is limited to -40°C ~ 85°C. The adjustable current feature provides design flexibility if topology modification is feasible.

Q: What is the temperature operating range difference between TPS2551DBVT and Microchip alternatives?

A: TPS2551DBVT operates from -40°C to 150°C (junction temperature). Microchip MIC2009A and MIC2019A series operate from -40°C to 85°C (ambient temperature). For applications requiring operation above 85°C ambient, TPS2551DBVT or TPS2551QDBVRQ1 are necessary.

Q: Are all listed parts RoHS3 compliant?

A: Yes. All parts listed maintain ROHS3 compliance. Moisture sensitivity levels vary: TPS2551 variants specify MSL 1 (Unlimited), while MIC2009A-1YM6-TR specifies MSL 2 (1 Year), requiring controlled storage and handling procedures.