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TPS2551DBVR Equivalent & Substitute Parts
Part Overview
The TPS2551DBVR is a Power Switch/Driver IC manufactured by Texas Instruments, classified as a general-purpose N-Channel high-side switch in SOT-23-6 packaging. This device delivers 1.1A maximum output current with 85mOhm typical on-resistance and operates across a 2.5V to 6.5V load voltage range. The part is marked as Not For New Designs, making identification of equivalent and substitute components essential for ongoing production support and design alternatives.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | TPS2551DBVR |
| Manufacturer | Texas Instruments |
| Category | Power Management (PMIC) |
| Switch Type | General Purpose |
| Output Type | N-Channel |
| Output Configuration | High Side |
| Number of Outputs | 1 |
| Voltage - Load | 2.5V ~ 6.5V |
| Current - Output (Max) | 1.1A |
| Rds On (Typ) | 85mOhm |
| Operating Temperature | -40°C ~ 150°C (TJ) |
| Package / Case | SOT-23-6 |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Product Status | Not For New Designs |
Substitute Part Grouping Explanation
Substitution for the TPS2551DBVR is determined by the following critical parameters:
Primary Substitution Criteria:
- Output Type: N-Channel (TPS2551DBVR, TPS2550DBVT, TPS2551DBVT, TPS2551QDBVRQ1)
- Output Configuration: High Side
- Number of Outputs: 1:1 ratio
- Voltage - Load: 2.5V ~ 6.5V compatibility
- Current - Output (Max): Minimum 1.1A
- Rds On (Typ): 85mOhm or lower
- Package / Case: SOT-23-6
- Mounting Type: Surface Mount
Secondary Substitution Criteria (Channel-Agnostic Alternatives):
- Output Type: P-Channel (MIC2009A-1YM6-TR, MIC2019A-1YM6-TR, MIC2019A-2YM6-TR, MIC2019YM6-TR, NCP380HSNAJAAT1G, NCP380LSNAJAAT1G)
- These alternatives function as high-side switches with comparable electrical characteristics but require circuit topology adjustment due to inverted polarity
Parametric Equivalents (N-Channel, Identical Specifications):
- TPS2550DBVT: Identical electrical specifications, Tape & Reel packaging
- TPS2551DBVT: Identical electrical specifications, Cut Tape packaging variant
- TPS2551QDBVRQ1: Automotive-grade variant with AEC-Q100 qualification, identical electrical specifications
Parameter Comparison
| Parameter | TPS2551DBVR | TPS2550DBVT | TPS2551DBVT | TPS2551QDBVRQ1 | MIC2009A-1YM6-TR | MIC2019A-1YM6-TR | MIC2019A-2YM6-TR | MIC2019YM6-TR | NCP380HSNAJAAT1G | NCP380LSNAJAAT1G |
|---|---|---|---|---|---|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | onsemi | onsemi |
| Output Type | N-Channel | N-Channel | N-Channel | N-Channel | P-Channel | P-Channel | P-Channel | P-Channel | P-Channel | P-Channel |
| Output Configuration | High Side | High Side | High Side | High Side | High Side | High Side | High Side | High Side | High Side | High Side |
| Voltage - Load | 2.5V ~ 6.5V | 2.5V ~ 6.5V | 2.5V ~ 6.5V | 2.5V ~ 6.5V | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 2.5V ~ 5.5V | 2.5V ~ 5.5V |
| Current - Output (Max) | 1.1A | 1.1A | 1.1A | 1.1A | 900mA | 900mA | 900mA | 2A | Adjustable | Adjustable |
| Rds On (Typ) | 85mOhm | 85mOhm | 85mOhm | 85mOhm | 170mOhm | 170mOhm | 170mOhm | 70mOhm | 70mOhm | 70mOhm |
| Operating Temperature | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 150°C (TJ) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 | SOT-23-6 Thin, TSOT-23-6 | SOT-23-6 Thin, TSOT-23-6 |
| Product Status | Not For New Designs | Not For New Designs | Not For New Designs | Not For New Designs | 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 | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Parametric Equivalents (N-Channel, No Circuit Modification Required):
TPS2550DBVT and TPS2551DBVT are direct parametric equivalents to TPS2551DBVR. Both maintain identical electrical specifications and SOT-23-6 packaging. Selection between these three parts depends on packaging format availability: TPS2551DBVR (Cut Tape), TPS2550DBVT (Tape & Reel), or TPS2551DBVT (Cut Tape variant). All three are marked Not For New Designs.
TPS2551QDBVRQ1 is an automotive-grade variant with AEC-Q100 qualification, providing identical electrical performance with enhanced reliability for automotive applications. This part is also marked Not For New Designs but maintains the same parametric specifications.
Active Product Alternatives (Channel-Agnostic Substitutes):
For applications requiring active product status, P-Channel alternatives are available. These require circuit topology modification due to inverted polarity but offer equivalent functional performance:
MIC2019YM6-TR delivers superior current handling at 2A maximum output with 70mOhm on-resistance, reducing thermal dissipation compared to the original 1.1A specification. This part is active and ROHS3 compliant.
NCP380HSNAJAAT1G and NCP380LSNAJAAT1G provide adjustable current limiting and status flag outputs, offering enhanced protection features. Both are active products with 70mOhm on-resistance. Selection between these depends on enable input polarity requirements: NCP380HSNAJAAT1G (Enable Input High) or NCP380LSNAJAAT1G (Enable Input Low).
MIC2009A-1YM6-TR and MIC2019A-1YM6-TR/MIC2019A-2YM6-TR are active alternatives with 900mA current rating, suitable for lower-current applications. These parts operate within the 2.5V to 5.5V load voltage range, which is compatible with the original 2.5V to 6.5V specification.
Voltage Range Consideration:
All P-Channel alternatives operate at 2.5V to 5.5V load voltage, which is narrower than the original TPS2551DBVR specification of 2.5V to 6.5V. Applications requiring operation above 5.5V must use N-Channel equivalents (TPS2550DBVT, TPS2551DBVT, or TPS2551QDBVRQ1).
Temperature Range Consideration:
The original TPS2551DBVR operates to 150°C junction temperature. All P-Channel alternatives and N-Channel equivalents operate to maximum 85°C ambient temperature. Applications requiring extended temperature operation above 85°C must use the original part or TPS2551QDBVRQ1.
Frequently Asked Questions (FAQ)
Q: Can I directly replace TPS2551DBVR with TPS2550DBVT or TPS2551DBVT?
A: Yes. TPS2550DBVT and TPS2551DBVT are parametric equivalents with identical electrical specifications. The difference is packaging format: TPS2551DBVR and TPS2551DBVT are Cut Tape, while TPS2550DBVT is Tape & Reel. No circuit modification is required.
Q: What is the difference between N-Channel and P-Channel substitutes?
A: N-Channel substitutes (TPS2550DBVT, TPS2551DBVT, TPS2551QDBVRQ1) are direct replacements requiring no circuit changes. P-Channel substitutes (MIC2009A, MIC2019A, NCP380 series) require circuit topology modification due to inverted polarity but offer active product status and enhanced features.
Q: Why do P-Channel alternatives have lower voltage ratings?
A: P-Channel alternatives operate at 2.5V to 5.5V load voltage, compared to the original 2.5V to 6.5V. Applications requiring operation above 5.5V must use N-Channel equivalents.
Q: Is TPS2551QDBVRQ1 suitable for automotive applications?
A: Yes. TPS2551QDBVRQ1 carries AEC-Q100 qualification and automotive-grade designation, making it suitable for automotive applications while maintaining identical electrical specifications to the original TPS2551DBVR.
Q: What is the advantage of MIC2019YM6-TR over other alternatives?
A: MIC2019YM6-TR delivers 2A maximum output current with 70mOhm on-resistance, providing higher current capacity and lower on-resistance than the original 1.1A specification. This reduces thermal dissipation in power-limited applications.
Q: Can I use NCP380HSNAJAAT1G and NCP380LSNAJAAT1G interchangeably?
A: No. The primary difference is enable input polarity: NCP380HSNAJAAT1G requires high-level enable input, while NCP380LSNAJAAT1G requires low-level enable input. Select based on your circuit's control logic requirements.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance of the original TPS2551DBVR.
Q: What is the temperature operating range difference?
A: The original TPS2551DBVR operates to 150°C junction temperature. All N-Channel equivalents (TPS2550DBVT, TPS2551DBVT, TPS2551QDBVRQ1) maintain this specification. P-Channel alternatives operate to 85°C ambient temperature maximum, which is narrower than the original specification.
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