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Texas Instruments TPS2051BD
- Part No.:
- TPS2051BD
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2051BD.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:11,908
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Product details
Overview
TPS2051BD from Texas Instruments is a single-channel, current-limited power-distribution switch featuring a 70mΩ high-side N-channel MOSFET, 500mA continuous output current, thermal and short-circuit protection, and operation across 2.7V–5.5V input range. It serves as a smart load switch in USB-powered peripherals and embedded power rails where inrush control and fault isolation are critical.
For engineers reviewing the TPS2051BD datasheet, TPS2051BD pinout, TPS2051BD application, or TPS2051BD equivalent, this device is selected for its accurate 0.75A–1.25A current-limit threshold, 0.6ms typical rise time, undervoltage lockout (2.0–2.6V), deglitched OC reporting, and ultra-low 1μA standby supply current - all validated for SOIC-8 packaging.
Technical Context
The TPS2051BD integrates an internal charge pump to drive the high-side MOSFET gate, enabling full enhancement down to 2.7V input without external components. Its constant-current limiting activates when load current exceeds the specified threshold, pulling the open-drain OC pin low while maintaining regulation.
Thermal shutdown engages at 135°C junction temperature and recovers automatically at 125°C with 10°C hysteresis. Undervoltage lockout prevents switching below ~2.3V (rising) with 75mV hysteresis, ensuring clean enable/disable sequencing during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 500mA continuous; supports stable powering of moderate-load peripherals without derating at 85°C ambient. |
| rDS(on) | 70mΩ typical (D/DGN packages, 5V); enables <125mW conduction loss at 500mA, reducing thermal stress. |
| Current Limit Range | 0.75A min / 1.25A max; provides predictable fault current capping for PCB trace and connector protection. |
| Rise Time | 0.6ms typical (CL = 1µF, RL = 10Ω); controls inrush surge to prevent supply rail collapse on capacitive loads. |
| Supply Voltage Range | 2.7V–5.5V; compatible with 3.3V and 5V system rails, including USB VBUS and industrial I/O supplies. |
| Standby Current | 1μA max (output disabled); preserves battery life in always-on systems with infrequent load activation. |
| Operating Temperature | –40°C to +85°C ambient; qualified for industrial and extended-temperature embedded applications. |
Pinout & Package
TPS2051BD is packaged in an 8-pin SOIC (D package), 4.90mm × 3.91mm body size, with PowerPAD™ thermally enhanced construction internally connected to GND for board-level heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path for power switch and internal circuitry; must be connected to PCB ground plane via PowerPAD™. |
| IN | Power input | Accepts 2.7V–5.5V supply; feeds both internal charge pump and high-side MOSFET source. |
| EN | Enable input | Active-high logic control (VIH ≥ 2V); asserts internal gate drive to turn on the power switch. |
| OC | Overcurrent indicator | Open-drain, active-low output; pulled low during current limit or thermal shutdown; requires external pull-up. |
| OUT | Switched power output | Drives load through internal 70mΩ MOSFET; voltage follows IN when enabled, disconnected when disabled or faulted. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump | Enables full MOSFET enhancement from 2.7V input; eliminates need for external boost components or higher supply rails. |
| Accurate current limiting | Guaranteed 0.75A–1.25A trip window ensures consistent fault response across voltage/temperature without calibration. |
| Deglitched OC reporting | 4–15ms OC assertion/deassertion filter prevents false fault latching during transient overloads or startup surges. |
| Thermal shutdown recovery | Automatic restart after cooling to 125°C; avoids manual reset requirement in sealed or inaccessible systems. |
| UL recognition | UL File E169910 certified; meets safety requirements for end-equipment compliance in commercial and industrial products. |
Applications
| USB Peripheral Power Switching | Industrial I/O Module Protection |
|---|---|
Use Scenario: Isolating downstream USB devices (e.g., hubs, sensors) from host VBUS during hot-plug or fault events. IC Role / Device Role: Single-channel high-side load switch controlling 5V VBUS delivery with inrush and short-circuit protection. Use Value: Prevents host port shutdown due to downstream shorts; maintains system-level USB compliance via controlled rise/fall times. |
Use Scenario: Powering field-connected analog/digital I/O circuits subject to cable-induced transients and accidental shorts. IC Role / Device Role: Protected 5V/3.3V rail switch with thermal foldback and OC flag for PLC or gateway backplane modules. Use Value: Enables automatic fault containment without fuse replacement; OC signal triggers diagnostic logging in firmware. |
| Embedded System Power Sequencing | Capacitive Load Management |
Use Scenario: Enabling auxiliary subsystems (e.g., display backlight, sensor array) only after main processor initialization. IC Role / Device Role: Controlled power gate with logic-enable interface synchronized to MCU GPIO. Use Value: Eliminates uncontrolled power-on timing skew; 1μA standby current supports low-power sleep modes. |
Use Scenario: Driving large bulk capacitance (>100µF) on FPGA or microcontroller core rails without violating supply slew limits. IC Role / Device Role: Inrush-limited power switch with programmable rise time via external CL. Use Value: Limits peak inrush to <1A, avoiding upstream regulator dropout or voltage sag during cold start. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-distribution switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2041BD | Same SOIC-8 package, identical pinout, but uses active-low EN and lacks UL recognition. | Requires inverted enable logic; not certified for safety-critical end equipment requiring UL listing. | Select TPS2041BD only if EN polarity matches existing design and UL compliance is not required. |
| TPS2051BDBV | SOT-23-5 package (2.90mm × 1.60mm); same electrical specs but higher rDS(on) (95–140mΩ) and no PowerPAD™ thermal path. | Used in space-constrained portable designs; thermal performance limited by smaller footprint and no thermal pad. | Choose TPS2051BDBV when board area is critical and power dissipation remains ≤125mW under worst-case load. |
Compared with TPS2041BD and TPS2051BDBV, the TPS2051BD offers UL certification and superior thermal management via SOIC-8 PowerPAD™, making it preferred for industrial and safety-compliant applications where reliability and thermal headroom are prioritized over footprint size or enable polarity flexibility.
Availability
TPS2051BD is available at Aetrix Electronics and suitable for USB peripheral power switching, industrial I/O module protection, and embedded system power sequencing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS2051BD includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of expertise in high-reliability power IC design.
The TPS20xxB family was developed specifically for robust, current-limited power distribution in USB, industrial, and embedded systems - emphasizing fault resilience, thermal safety, and ease of integration without external support components.
FAQ
What is the maximum continuous output current rating for the TPS2051BD?
The TPS2051BD is rated for 500mA continuous output current across its full operating temperature range (–40°C to +85°C ambient). This rating assumes proper PCB thermal design using the PowerPAD™ to maintain junction temperature within 125°C under sustained load. Derating may be required above 70°C ambient depending on copper area and airflow.
Does the TPS2051BD require external components to operate from a 2.7V supply?
No, the TPS2051BD does not require external components to operate from 2.7V. Its integrated charge pump generates sufficient gate drive voltage to fully enhance the internal 70mΩ N-channel MOSFET even at minimum input voltage, eliminating the need for external boost circuits or higher auxiliary supplies.
How does the overcurrent (OC) pin behave during a short-circuit event on the TPS2051BD?
During a short circuit, the TPS2051BD enters constant-current mode and pulls the OC pin low in an open-drain configuration. The OC signal remains asserted for the duration of the overload and includes a 4–15ms deglitch filter to reject transient spikes. It returns high only after the fault clears and the device exits current-limit mode.
What is the purpose of the PowerPAD™ on the TPS2051BD SOIC package?
The PowerPAD™ on the TPS2051BD is an exposed thermal pad on the underside of the SOIC-8 package, internally connected to GND. When soldered to a PCB ground plane, it significantly reduces junction-to-board thermal resistance (RθJB = 59.6°C/W), improving power handling and enabling reliable 500mA operation in compact layouts without forced air cooling.
Is the TPS2051BD UL-recognized, and what does that mean for end-product certification?
Yes, the TPS2051BD carries UL Recognition under File E169910. This means the device has been evaluated by UL for safety compliance (e.g., dielectric strength, flammability, thermal performance) and may be used in end products seeking UL/CSA certification without requiring retesting of the IC itself - accelerating time-to-market for industrial and commercial equipment.
TPS2051BD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.7V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 500mA
- Rds On (Typ):
- 70mOhm
- Input Type:
- Non-Inverting
- Features:
- -
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS2051BD FAQ
1.How can I place an order for TPS2051BD through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2051BD on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS2051BD reliable?
The price and inventory of TPS2051BD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2051BD is usually 5 days.
3.What payment methods are accepted for TPS2051BD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2051BD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2051BD?
TPS2051BD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2051BD order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS2051BD?
For technical support, including TPS2051BD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2051BD requirements.
6.How does Aetrix verify that TPS2051BD is sourced from the original manufacturer or authorized distributors?
All TPS2051BD products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS2051BD meets industry standards.
7.What is the process for return or replacement of TPS2051BD?
All TPS2051BD units undergo pre-shipment inspection (PSI). If there is an issue with TPS2051BD, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS2051BD part is unused and in its original packaging.
Return procedure for TPS2051BD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS2051BD Tags
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TPS22919DCKR
Texas Instruments
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MIC2091-1YM5-TR
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MIC2090-1YM5-TR
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TPS22995RZFR
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SIP32510DT-T1-GE3
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ULN2003D1013TR
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MIC2005A-1YM5-TR
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MIC2005A-1YM6-TR
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TPS22916BYFPR
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TPS22917DBVR
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ULN2003APWR
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