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Texas Instruments TPS2051BDGN
- Part No.:
- TPS2051BDGN
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
TPS2051BDGN.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:11,108
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Product details
Overview
TPS2051BDGN 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 robust load switch in USB-powered peripherals and embedded systems with heavy capacitive loads.
For engineers reviewing the TPS2051BDGN datasheet, TPS2051BDGN pinout, TPS2051BDGN application, or TPS2051BDGN equivalent, key selection criteria include its accurate 0.75A–1.25A current-limit threshold, 0.6ms typical rise time, undervoltage lockout (2.0–2.6V), deglitched OC fault reporting, and ultra-low 1μA standby supply current - all critical for reliable hot-swap and inrush control in space-constrained designs.
Technical Context
The TPS2051BDGN integrates an internal charge pump to drive the gate of its high-side MOSFET, 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 to signal fault conditions.
Thermal shutdown engages at 135°C junction temperature and recovers automatically at 125°C with 10°C hysteresis. The device remains disabled until valid input voltage is present, and OC assertion is deglitched for 4–15ms to prevent false triggers during transient events like power-up or load switching.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 500 mA - supports sustained load delivery without derating under 85°C ambient |
| rDS(on) | 70 mΩ (typ) at 5V - minimizes conduction loss and self-heating in 5V rail applications |
| Current Limit Threshold | 0.75 A min / 1.25 A max - ensures predictable overcurrent response across temperature and voltage |
| 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 (typ) - controls inrush dI/dt to limit stress on upstream regulators and bulk capacitance |
| Standby Supply Current | 1 μA - enables always-on power management without measurable battery drain |
| Operating Temperature | –40°C to +85°C - qualified for industrial and extended-temperature embedded environments |
Pinout & Package
HVSSOP-8 (DGN) package: 3.00 mm × 3.00 mm body, exposed PowerPAD™ thermally connected to GND for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND | Ground reference | Primary return path; PowerPAD™ must be soldered to PCB ground plane for thermal and electrical integrity |
| IN | Power input | Accepts 2.7–5.5V supply; feeds internal charge pump and high-side switch |
| EN | Enable input | Active-high logic control (VIH ≥ 2V); enables/disables output with no external pull-up required |
| OC | Open-drain fault output | Active-low overcurrent indicator; deglitched 4–15ms; requires external pull-up for MCU interrupt |
| OUT | Switched power output | Drives downstream load; internally limited to safe current during shorts or overload |
Key Features
| Feature | Design Value |
|---|---|
| Integrated charge pump | Enables full MOSFET enhancement from 2.7V input - eliminates need for external gate-drive circuitry |
| Accurate current limit | Guaranteed 0.75–1.25A window ensures consistent trip behavior across voltage, temperature, and process variation |
| OC deglitching | 4–15ms filtering prevents false fault reporting during benign transients like capacitor charging or ESD events |
| Thermal shutdown recovery | Automatic restart at 125°C after cooling - avoids manual reset while preventing latch-up damage |
| UL Recognition | E169910 certified - meets safety requirements for end-equipment compliance without additional isolation |
Applications
| USB Peripheral Power Switching | Industrial Sensor Node Protection |
|---|---|
Use Scenario: Hot-plug USB devices (keyboards, hubs, dongles) powered from host 5V rail with large decoupling capacitance. IC Role / Device Role: High-side load switch managing inrush current and isolating faults from upstream USB controller. Use Value: Prevents bus voltage droop and host port shutdown by limiting peak inrush to ≤1.25A and reporting overcurrent via OC pin. | Use Scenario: Remote sensor modules powered over 24V-to-5V DC-DC converters with local 100µF+ output capacitance. IC Role / Device Role: Final-stage distribution switch providing short-circuit and thermal protection before analog front-end. Use Value: Enables safe field replacement without powering down entire node; 1μA standby preserves battery life in sleep mode. |
| Embedded System Rail Sequencing | Medical Diagnostic Equipment Power Control |
Use Scenario: Controlled power-up of FPGA I/O banks or ADC reference supplies requiring staggered enable timing. IC Role / Device Role: Individually enabled power switch supporting precise sequencing via GPIO-controlled EN pins. Use Value: 0.6ms rise time allows deterministic turn-on delay; OC feedback enables firmware-level fault logging and retry logic. | Use Scenario: Isolated power domains in portable ultrasound or patient monitor subsystems where reliability is safety-critical. IC Role / Device Role: Protected 5V distribution switch for display backlight or communication interface ICs. Use Value: UL E169910 recognition supports regulatory submission; thermal shutdown prevents hazardous overheating during cable fault conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar power-distribution switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2041BDGN | Same HVSSOP-8 package and pinout; active-low EN (vs active-high for TPS2051B); identical rDS(on), current limit, and protection features | Requires inverted enable logic; otherwise drop-in in layout and BOM; suitable where system uses active-low control signals | Select TPS2041BDGN only if existing firmware/hardware drives EN low to enable - no change to thermal or electrical performance |
| TPS2051BDBVR | SOT-23-5 package (2.90mm × 1.60mm); same electrical specs and active-high EN; higher rDS(on) (95–140mΩ) due to smaller die | Used where board area is more constrained than thermal margin; lower power density increases junction temp rise under 500mA | Choose TPS2051BDBVR for ultra-compact designs accepting ~25% higher conduction loss; verify thermal performance with RθJA = 208.6°C/W |
Compared with TPS2041BDGN and TPS2051BDBVR, the TPS2051BDGN delivers optimal balance of low rDS(on), compact HVSSOP-8 footprint, and active-high logic compatibility - making it preferred for new 5V USB and industrial control designs where thermal headroom and control simplicity are prioritized.
Availability
TPS2051BDGN is available at Aetrix Electronics and suitable for USB peripheral power management, industrial sensor node protection, and embedded rail sequencing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS2051BDGN 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 automotive, industrial, and consumer design expertise.
The TPS20xxB family was engineered specifically for robust, low-voltage power distribution in systems prone to heavy capacitive loads and short circuits - delivering integrated protection, precise current limiting, and minimal external component count.
FAQ
What is the maximum continuous output current rating for the TPS2051BDGN?
The TPS2051BDGN is rated for 500 mA continuous output current across its full operating temperature range (–40°C to +85°C). This rating assumes proper PCB thermal design using the exposed PowerPAD™ connected to a sufficient copper area. Exceeding this current may trigger current-limit mode or thermal shutdown depending on ambient conditions and load duration.
Does the TPS2051BDGN require an external gate driver or charge pump capacitor?
No, the TPS2051BDGN integrates a fully self-contained charge pump that generates the necessary gate voltage for its internal high-side N-channel MOSFET. No external capacitors or drivers are needed - simplifying layout and reducing BOM count while maintaining full switch enhancement down to 2.7V input.
How does the overcurrent (OC) pin behave during a short-circuit event on the TPS2051BDGN?
During a short circuit, the TPS2051BDGN enters constant-current mode and pulls the OC pin low within microseconds. The OC signal is deglitched for 4–15ms to reject noise, then remains asserted until the fault clears and the device recovers. Once the short is removed, the switch resumes normal operation automatically unless thermal shutdown has also been triggered.
What is the undervoltage lockout (UVLO) threshold for the TPS2051BDGN?
The TPS2051BDGN features an undervoltage lockout with a rising threshold between 2.0 V and 2.6 V (typical 2.3 V), and hysteresis of 75 mV. This ensures the device remains disabled until the input rail is sufficiently stable, preventing erratic switching or incomplete turn-on during brownout conditions.
Can the TPS2051BDGN be used in battery-powered applications with strict quiescent current requirements?
Yes - the TPS2051BDGN draws only 1 μA of supply current in standby (output disabled), making it ideal for battery-powered systems requiring ultra-low power consumption during sleep or idle states. This value is guaranteed across –40°C to +125°C junction temperature and does not increase with input voltage.
TPS2051BDGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- 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-HVSSOP
TPS2051BDGN FAQ
1.How can I place an order for TPS2051BDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2051BDGN 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 TPS2051BDGN reliable?
The price and inventory of TPS2051BDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2051BDGN is usually 5 days.
3.What payment methods are accepted for TPS2051BDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2051BDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2051BDGN?
TPS2051BDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2051BDGN 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 TPS2051BDGN?
For technical support, including TPS2051BDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2051BDGN requirements.
6.How does Aetrix verify that TPS2051BDGN is sourced from the original manufacturer or authorized distributors?
All TPS2051BDGN 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 TPS2051BDGN meets industry standards.
7.What is the process for return or replacement of TPS2051BDGN?
All TPS2051BDGN units undergo pre-shipment inspection (PSI). If there is an issue with TPS2051BDGN, 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 TPS2051BDGN part is unused and in its original packaging.
Return procedure for TPS2051BDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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