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Texas Instruments TPS2051DR
- Part No.:
- TPS2051DR
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2051DR.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,732
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Product details
Overview
TPS2051DR from Texas Instruments is a 500 mA continuous-current, active-high-enable, high-side N-channel MOSFET power distribution switch with 135 mΩ maximum RDS(on) at 5 V input, integrated short-circuit and thermal protection, and an open-drain overcurrent (OC) logic output. It operates from 2.7 V to 5.5 V and is used in USB host/port power management, hot-swap circuits, and peripheral power control where controlled inrush and fault reporting are required.
For engineers reviewing the TPS2051DR datasheet, TPS2051DR pinout, TPS2051DR application, or TPS2051DR equivalent, this device delivers precise current limiting (0.9 A typical short-circuit threshold), 2.5-ms typical rise time, undervoltage lockout (~2 V), <10 µA standby supply current, and SOIC-8 packaging - all critical for robust, low-EMI USB-compliant power switching designs.
Technical Context
The TPS2051DR integrates an internal charge pump enabling gate drive above source voltage for full enhancement of its high-side N-MOSFET across 2.7–5.5 V input range. Its driver circuitry actively controls output rise/fall times (2.5 ms / 4.4 ms typical at 5.5 V) to suppress inrush surges and EMI during switching.
Current sensing uses a matched sense FET - not a shunt resistor - ensuring minimal conduction loss while enabling accurate 0.9-A current-limit trip and constant-current mode under overload. Thermal shutdown activates at ~140°C junction temperature with ~20°C hysteresis, and UVLO disables the switch below ~2 V input to prevent erratic turn-on during brownout or hot-insertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 500 mA - supports sustained load delivery without derating in ambient ≤85°C with proper PCB thermal design |
| RDS(on) (max, 5 V) | 135 mΩ - limits I²R power loss to ≤33.8 mW at 500 mA, enabling compact SOIC-8 thermal performance |
| Enable Polarity | Active-high - compatible with standard 3.3 V/5 V CMOS/TTL logic; enables direct interface to microcontroller GPIO |
| Rise Time (typ.) | 2.5 ms - soft-starts downstream capacitance (e.g., 1 µF load), suppressing inrush peaks and system rail droop |
| Overcurrent Output | Open-drain OC pin - asserts low during current limit or thermal fault, enabling direct connection to USB controller interrupt |
| Supply Current (disabled) | ≤10 µA - minimizes quiescent drain in battery-backed or always-on systems when port is unpowered |
| Operating Voltage Range | 2.7 V to 5.5 V - supports single-supply operation across USB 5 V, Li-ion battery (3.0–4.2 V), and regulated 3.3 V rails |
Pinout & Package
TPS2051DR is housed in an 8-pin SOIC (D) package with gull-wing leads, RoHS-compliant, tape-and-reel format (R suffix). Pin 1 is bottom-left corner (notch-down orientation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Return path for internal charge pump, driver, and current-sense circuitry; must be low-impedance to GND plane |
| IN (Pins 2,3) | Input power supply | Dual-source pins reduce trace resistance and inductance; accepts 2.7–5.5 V; requires local 0.1 µF ceramic bypass |
| EN (Pin 4) | Active-high enable input | Logic high ≥2 V enables switch; logic low disables and reduces supply current to ≤10 µA |
| OC (Pin 5) | Open-drain overcurrent flag | Asserts low during current limit or thermal shutdown; requires external pull-up to VCC or USB VBUS |
| OUT (Pins 6,7,8) | Switched output | Three paralleled pins minimize voltage drop and thermal stress; connects to downstream load or USB VBUS line |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump | Enables full N-MOSFET enhancement down to 2.7 V input without external components or bootstrap capacitors |
| Controlled slew-rate output | 2.5-ms rise / 4.4-ms fall time limits di/dt, reducing EMI and preventing false triggering of upstream OVP/UVP circuits |
| Sense-FET current monitoring | Eliminates series shunt resistor, preserving efficiency and minimizing board space vs. discrete current-limit solutions |
| Thermal shutdown with hysteresis | Auto-recovers after ~20°C cooldown, enabling fault-tolerant operation in intermittent overload conditions (e.g., USB hot-plug) |
| UL recognition (E169910) | Validated for end-equipment safety compliance in USB host/hub applications without additional isolation components |
Applications
| USB Host Port Power Switching | Industrial Hot-Swap Module |
|---|---|
|
Use Scenario: Desktop PC or embedded host controller distributing 5 V to multiple downstream USB ports. IC Role / Device Role / Timing Role: High-side power switch per port, enabling/disabling VBUS with controlled ramp and real-time overcurrent reporting to USB controller. Use Value: Meets USB specification requirements for current limiting (≤500 mA), inrush suppression (<44 Ω + 10 µF), and OC fault signaling - no external FET or sense resistor needed. |
Use Scenario: Field-replaceable module in programmable logic controller (PLC) backplane requiring safe insertion under power. IC Role / Device Role / Timing Role: Primary power switch isolating module supply rail; OC pin feeds PLC diagnostics; EN driven by FPGA configuration state. Use Value: Prevents bus disturbance during insertion via 2.5-ms soft-start, while thermal protection avoids damage from transient short circuits during mating. |
| Self-Powered USB Hub | Low-Power Peripheral Power Control |
|
Use Scenario: Standalone USB hub with local 5 V supply powering four downstream ports. IC Role / Device Role / Timing Role: Individual port switch per downstream connector, each with independent OC reporting and enable control. Use Value: Enables per-port current limiting and fault isolation - if one port shorts, only that port shuts down; others remain operational per USB spec. |
Use Scenario: Battery-powered medical sensor node enabling/disabling RF transceiver or display backlight on demand. IC Role / Device Role / Timing Role: Load switch managing power to high-current subsystems; EN tied to MCU GPIO; OC monitors for abnormal draw indicating fault. Use Value: Reduces system standby current to <10 µA when disabled, extending battery life; 135-mΩ RDS(on) minimizes dropout in 3.3 V supply chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side load switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2041DR | Active-low enable (EN), otherwise identical electrical specs and pinout | Requires inverted logic signal; suitable where system enable logic is active-low or open-collector | Select TPS2041DR only if existing firmware/hardware drives EN low to activate - no change to layout or BOM beyond part number |
| TPS2051BDGNR | Same functionality in 8-pin MSOP package (3.0 × 3.0 mm); higher thermal resistance (θJA = 210°C/W vs. 172°C/W) | Better fit for space-constrained boards; requires tighter thermal management at >300 mA continuous load | Choose TPS2051BDGNR when PCB area is critical and peak load current remains ≤300 mA with adequate copper pour |
Compared with TPS2051DR, TPS2041DR offers identical protection and switching performance but demands active-low control, while TPS2051BDGNR trades SOIC-8's thermal robustness for footprint reduction - both require validation of enable logic polarity and thermal margin in final layout.
Availability
TPS2051DR is available at Aetrix Electronics and suitable for USB host design, industrial hot-swap modules, and self-powered hub development requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for TPS2051DR 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 ICs, with decades of expertise in USB, industrial, and automotive power solutions.
The TPS20xx family was designed specifically for USB-compliant power distribution - delivering integrated current limiting, fault reporting, and soft-start in compact packages to simplify host/hub and peripheral power architecture.
FAQ
What is the enable logic polarity of the TPS2051DR?
The TPS2051DR features active-high enable: the power switch turns on when the EN pin voltage exceeds 2 V (minimum VIH), and turns off when EN is pulled low (≤0.4 V at 2.7–4.5 V input). This matches standard microcontroller GPIO outputs without level-shifting or inversion. The TPS2051DR datasheet specifies VIH = 2 V min and VIL = 0.4 V max under recommended operating conditions.
Does the TPS2051DR require external components for basic operation?
No external components are required for core switching functionality of the TPS2051DR. However, TI recommends a 0.1 µF ceramic capacitor between IN and GND (close to the device) for input bypass, and an external pull-up resistor on the OC pin for fault reporting. For USB applications, an RC filter on OC may be added to suppress inrush-induced false triggers - but it is not mandatory for baseline operation.
How does the TPS2051DR respond to a short-circuit fault?
When a short occurs, the TPS2051DR immediately enters constant-current mode, limiting output current to ~0.9 A (typical) while reducing output voltage. The OC pin pulls low to signal the fault. If the short persists, power dissipation raises junction temperature; at ~140°C, thermal shutdown disables the switch. After cooling ~20°C, the TPS2051DR automatically recovers - cycling until the fault clears.
Can the TPS2051DR operate from a 3.3 V supply?
Yes, the TPS2051DR fully supports 3.3 V input operation within its 2.7–5.5 V range. At 3.3 V, RDS(on) increases to ≤150 mΩ (max at 125°C), resulting in ≤37.5 mW conduction loss at 500 mA. Rise time extends to ~3 ms, and the charge pump maintains reliable gate drive - confirmed in TI's SLVS172A datasheet electrical characteristics tables.
Is the TPS2051DR pin-compatible with other devices in the TPS20xx family?
The TPS2051DR shares identical SOIC-8 pinout and footprint with TPS2041DR, TPS2051P, and TPS2041P. All variants use the same terminal functions (GND, IN×2, EN, OC, OUT×3), enabling direct PCB substitution where enable polarity and package type match. However, TPS2041DR requires active-low logic, so firmware or upstream driver changes may be needed despite mechanical compatibility.
TPS2051DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 80mOhm
- 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
TPS2051DR FAQ
1.How can I place an order for TPS2051DR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2051DR 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 TPS2051DR reliable?
The price and inventory of TPS2051DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2051DR is usually 5 days.
3.What payment methods are accepted for TPS2051DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2051DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2051DR?
TPS2051DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2051DR 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 TPS2051DR?
For technical support, including TPS2051DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2051DR requirements.
6.How does Aetrix verify that TPS2051DR is sourced from the original manufacturer or authorized distributors?
All TPS2051DR 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 TPS2051DR meets industry standards.
7.What is the process for return or replacement of TPS2051DR?
All TPS2051DR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2051DR, 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 TPS2051DR part is unused and in its original packaging.
Return procedure for TPS2051DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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