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Texas Instruments TPS2051BDBVT
- Part No.:
- TPS2051BDBVT
- Manufacturer:
- Texas Instruments
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS2051BDBVT.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:10,479
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Product details
Overview
TPS2051BDBVT 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 from 2.7V to 5.5V. It serves as a smart load switch in USB-powered peripherals and embedded systems requiring controlled hot-swap capability and robust fault management.
For engineers reviewing the TPS2051BDBVT datasheet, TPS2051BDBVT pinout, TPS2051BDBVT application, or TPS2051BDBVT equivalent, key selection criteria include its accurate 0.75A–1.25A current-limit threshold, 0.6ms typical rise time, 1μA standby supply current, undervoltage lockout (2.0–2.6V), and SOT-23-5 package compatibility with space-constrained PCB layouts.
Technical Context
The TPS2051BDBVT integrates an internal charge pump to drive the high-side MOSFET gate, enabling full enhancement down to 2.7V input while controlling rise/fall times to suppress inrush current. Its deglitched OC output provides noise-immune overcurrent reporting without false triggers during power-up.
Under overload, it enters constant-current limiting; sustained faults trigger thermal shutdown at 135°C with 10°C hysteresis and automatic recovery. Internal UVLO ensures the switch remains off until valid input voltage is present, preventing erratic behavior during brownout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 500 mA - supports USB-compliant downstream ports and low-power peripheral rails |
| Current Limit Threshold | 0.75 A min / 1.25 A max - enables precise fault detection without nuisance tripping |
| RDS(on) | 70 mΩ (D/DGN) / 95 mΩ (DBV) - determines conduction loss and self-heating under load |
| Input Voltage Range | 2.7 V to 5.5 V - compatible with Li-ion, USB, and regulated 3.3V/5V system rails |
| Rise Time (tr) | 0.6 ms typical - limits inrush di/dt into heavy capacitive loads (e.g., 100 µF decoupling) |
| Standby Supply Current | 1 µA - enables ultra-low-power sleep modes in battery-backed systems |
| Thermal Shutdown | 135°C trip / 125°C recovery - protects against sustained short circuits and board-level overheating |
Pinout & Package
SOT-23-5 package (2.90 mm × 1.60 mm), surface-mount, thermally enhanced with exposed pad connected internally to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power input | Connects to 2.7–5.5V supply rail; feeds internal charge pump and switch FET source |
| OUT | Switched power output | Delivers current-limited, protected power to load; no external flyback diode required |
| EN | Enable input (active-high) | Logic-high (>2V) turns on switch; logic-low disables output and reduces quiescent current to 1 µA |
| OC | Open-drain overcurrent flag | Pulled low during current limit or thermal shutdown; requires external pull-up for host monitoring |
| GND | Ground reference | Common return for power, control, and thermal path; must be low-impedance for stability |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump | Enables full MOSFET enhancement from 2.7V input-no external components needed |
| Accurate current limit | Guaranteed 0.75–1.25A range eliminates need for external sense resistors or calibration |
| Deglitched OC output | 4–15ms filter prevents false fault reporting from transient spikes or switching noise |
| No OC glitch at power-up | Ensures clean initialization-host MCU can safely monitor OC without startup spurious asserts |
| UL Recognized (E169910) | Validated for end-equipment safety compliance in commercial and industrial applications |
Applications
| USB Peripheral Power Switching | Hot-Swap Board Management |
|---|---|
Use Scenario: Powering USB audio interfaces, HID devices, or serial adapters where plug-in surge and short-circuit risk exist. IC Role / Device Role: Single-channel high-side load switch with current limiting and OC reporting. Use Value: Prevents bus voltage collapse during hot-plug events and isolates faults without disabling entire USB hub. | Use Scenario: Controlled power sequencing for FPGA I/O banks or sensor modules added post-power-on. IC Role / Device Role: Enable-controlled distribution switch with soft-start and thermal protection. Use Value: Limits inrush to <1A during module insertion, avoiding supply rail droop and system reset. |
| Low-Power Embedded System Rail Control | Capacitor-Charged Backup Circuit Enable |
Use Scenario: Enabling/disabling 3.3V rails for BLE radios or display drivers in battery-operated IoT nodes. IC Role / Device Role: Ultra-low-quiescent (1µA) enable switch with fast turn-off for energy harvesting duty cycling. Use Value: Extends battery life by cutting leakage paths when subsystems are idle, with sub-millisecond response. | Use Scenario: Activating backup power paths using supercapacitors charged via main supply. IC Role / Device Role: High-side switch managing capacitor discharge into critical logic during main supply failure. Use Value: Ensures clean, current-limited delivery from stored energy-prevents capacitor over-discharge and voltage sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-distribution switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2041BDBVR | Same SOT-23-5 package, but active-low EN and lower RDS(on) (70mΩ typ); no UL recognition | Requires inverted enable logic; suited for cost-sensitive designs without safety certification needs | Choose when EN polarity matches existing control logic and UL listing is not required |
| AP2171SG-13 | 500mA rating, 110mΩ RDS(on), 1.2µA quiescent, but no deglitched OC output or UL recognition | Lacks fault debouncing-requires external RC filtering for noisy environments | Select for compact footprint and basic current limiting where OC reliability is secondary |
Compared with TPS2041BDBVR and AP2171SG-13, the TPS2051BDBVT offers guaranteed active-high enable timing, UL safety recognition, and hardware-deglitched OC reporting-critical for certified industrial and USB-compliant designs where fault integrity and regulatory compliance are mandatory.
Availability
TPS2051BDBVT is available at Aetrix Electronics and suitable for USB peripheral power management, hot-swap board enablement, and low-power embedded rail control requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS2051BDBVT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and consumer markets.
The TPS20xxB family was designed specifically for robust, current-limited power distribution in systems exposed to heavy capacitive loads and accidental shorts-targeting USB, docking stations, and modular embedded platforms.
FAQ
What is the maximum continuous output current of the TPS2051BDBVT?
The TPS2051BDBVT supports 500 mA continuous output current. This rating is maintained across the full operating temperature range (–40°C to 85°C) and input voltage range (2.7 V to 5.5 V). The device enters constant-current limiting if load demand exceeds this value, protecting both itself and the downstream circuitry. Peak short-circuit current is specified between 0.75 A and 1.25 A depending on junction temperature and input voltage.
Does the TPS2051BDBVT require external components for basic operation?
No, the TPS2051BDBVT operates autonomously with no external components required for core functionality. Its integrated charge pump eliminates the need for external gate-drive circuitry, and the deglitched OC output functions with only a single external pull-up resistor. Input and output capacitors are recommended per layout guidelines but are not part of the IC's internal functional block.
How does the TPS2051BDBVT handle thermal overload conditions?
When power dissipation causes junction temperature to reach 135°C, the TPS2051BDBVT activates thermal shutdown, turning off the internal MOSFET and pulling the OC pin low. Recovery occurs automatically once the die cools to approximately 125°C (10°C hysteresis). This behavior is independent of enable state and ensures protection even during sustained short-circuit faults.
What is the purpose of the deglitched OC output in the TPS2051BDBVT?
The deglitched OC output in the TPS2051BDBVT filters transient overcurrent events with a 4–15 ms blanking window, preventing false fault assertions caused by inrush surges or noise. This allows host microcontrollers to reliably detect only sustained faults-not momentary spikes-reducing unnecessary system resets or error logging. The OC pin is open-drain and requires an external pull-up resistor.
Is the TPS2051BDBVT UL-recognized, and what does that mean for system design?
Yes, the TPS2051BDBVT carries UL Recognition under file E169910. This certification validates its construction, isolation, and fault-handling performance for use in end equipment seeking UL/CSA safety approval. Designers can leverage this recognition to simplify system-level safety testing and reduce time-to-market for commercial and industrial products requiring regulatory compliance.
TPS2051BDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- SC-74A, SOT-753
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 95mOhm
- 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:
- SOT-23-5
TPS2051BDBVT FAQ
1.How can I place an order for TPS2051BDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2051BDBVT 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 TPS2051BDBVT reliable?
The price and inventory of TPS2051BDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2051BDBVT is usually 5 days.
3.What payment methods are accepted for TPS2051BDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2051BDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2051BDBVT?
TPS2051BDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2051BDBVT 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 TPS2051BDBVT?
For technical support, including TPS2051BDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2051BDBVT requirements.
6.How does Aetrix verify that TPS2051BDBVT is sourced from the original manufacturer or authorized distributors?
All TPS2051BDBVT 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 TPS2051BDBVT meets industry standards.
7.What is the process for return or replacement of TPS2051BDBVT?
All TPS2051BDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS2051BDBVT, 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 TPS2051BDBVT part is unused and in its original packaging.
Return procedure for TPS2051BDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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