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Texas Instruments TPS25820DSST
- Part No.:
- TPS25820DSST
- Manufacturer:
- Texas Instruments
- Category:
- Specialized
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
TPS25820DSST.pdf
- Description:
- IC INTERFACE SPECIALIZED 12WSON
- Quantity:
- Payment:
- Shipping:
Inventory:2,703
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Product details
Overview
TPS25820DSST from Texas Instruments is a USB Type-C 1.5-A source controller and integrated power switch for Downstream Facing Port (DFP) applications. It provides VBUS sourcing, VCONN power delivery (TPS25820 only), CC line monitoring, and polarity detection with 64-mΩ typical RDS(on), ±8-kV CC-line ESD protection, and 1.7-A ±7% accurate current limit. It enables compliant USB 3.1 DFP ports in docking stations and wall chargers.
For engineers reviewing the TPS25820DSST datasheet, TPS25820DSST pinout, TPS25820DSST application, or TPS25820DSST equivalent, this page delivers verified technical context, real-world timing and switching behavior, confirmed VCONN capability, validated thermal shutdown thresholds, and precise current-limiting performance under load - all critical for USB-C port design validation and BOM selection.
Technical Context
The TPS25820DSST implements a dual-role CC-line monitor to detect sink attachment, determine cable orientation via POL output, and assert VCONN on CC2 when an electronically marked cable is present. Its internal charge pump drives VCONN with 250-mA current limit and 480-mΩ typical RDS(on) at 25°C.
It uses analog current-sense feedback with REF pin biasing (100-kΩ to GND) to set VBUS current limit at 1.7 A ±7%, responds to overcurrent in 1.5 µs, and features dual thermal shutdown thresholds: 135°C for OUT/VCONN switch disable and 155°C for full device shutdown with 20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBUS Current Limit | 1.7 A ±7% - ensures compliance with USB Type-C 1.5-A sourcing requirement and prevents overstress during short-circuit events |
| OUT RDS(on) | 64 mΩ typ at 25°C - minimizes conduction loss and thermal rise at 1.5-A load, enabling compact PCB layout |
| VCONN Support | Yes - enables USB 3.1 SuperSpeed operation with electronically marked cables by powering CC2 at 250 mA |
| CC-Line ESD Rating | ±8-kV contact / ±15-kV air (IEC-61000-4-2) - protects configuration channel against real-world electrostatic discharge in end-user environments |
| Quiescent Supply Current | 1.0 µA typ with no attachment - extends system standby time and reduces idle power in always-on USB-C ports |
| Overcurrent Response Time | 1.5 µs typical - limits fault energy before PCB trace damage or connector arcing occurs |
| Thermal Shutdown Thresholds | 135°C (OUT/VCONN disable) and 155°C (full shutdown) - provides staged protection for MOSFET reliability and system safety |
Pinout & Package
TPS25820DSST is housed in a 12-pin WSON package (3.00 mm × 2.00 mm) with exposed thermal pad for enhanced heat dissipation in high-density USB-C port designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 1,2) | Power input supply | Accepts 4.5–5.5 V bus input for both VBUS and VCONN switches; dual-pin routing improves current handling and reduces IR drop |
| CHG (Pin 3) | Current mode select input | Logic-high enables 1.5-A VBUS advertisement; logic-low selects standard USB current (500/900 mA) |
| EN (Pin 4) | Enable control input | Active-high digital enable; must be pulled high for normal operation; supports system-level power sequencing |
| FAULT (Pin 5) | Open-drain fault indicator | Asserts low on overcurrent or overtemperature; requires external 100-kΩ pull-up to IN for proper logic level |
| SINK (Pin 6) | Open-drain sink detect output | Drives low when Rd termination detected on CC1 or CC2 - signals valid sink attachment to host controller |
| POL (Pin 7) | Open-drain polarity indicator | Drives low when CC2 is active - informs mux logic of SuperSpeed lane orientation for correct data routing |
| REF (Pin 8) | Analog reference input | Connects to 100-kΩ precision resistor to GND to set VBUS current limit threshold; determines accuracy of 1.7-A limit |
| CC1 (Pin 9) | Configuration channel I/O | Analog bidirectional interface to Type-C receptacle CC1; monitors Rd/Ra terminations and sources VCONN when selected |
| GND (Pin 10) | Ground reference | Primary signal and power return; must be connected to thermal pad for optimal thermal performance |
| CC2 (Pin 11) | Configuration channel I/O | Analog bidirectional interface to Type-C receptacle CC2; used for VCONN delivery and cable orientation resolution |
| OUT (Pin 12) | VBUS power switch output | Delivers regulated 5-V power to Type-C connector; integrates 64-mΩ MOSFET with fast 1.5-µs overcurrent response |
Key Features
| Feature | Design Value |
|---|---|
| USB Type-C Rel. 1.3 compliance | Meets mandatory VCONN discharge, CC attach/detach detection, and polarity determination requirements for certified DFP implementation |
| Integrated VCONN power switch | Provides 250-mA VCONN at CC2 with 480-mΩ RDS(on), eliminating need for external LDO or charge pump in USB 3.1 designs |
| Low-power standby mode | Draws only 1.0 µA with no cable attached - reduces system quiescent consumption in portable and battery-backed applications |
| Dual thermal protection | Staged shutdown: 135°C disables VBUS/VCONN switches only; 155°C fully disables device - preserves system functionality while preventing damage |
| Fast overcurrent response | 1.5 µs detection-to-limit activation - constrains fault energy below I²t thresholds of USB-C connectors and PCB traces |
Applications
| USB 3.1 Docking Station | USB-C Wall Charger |
|---|---|
Use Scenario: Desktop docking station with USB 3.1 data + 1.5-A charging via single Type-C uplink. IC Role / Device Role / Timing Role: TPS25820DSST acts as DFP controller, managing VBUS enable, VCONN delivery to active cables, and SuperSpeed polarity signaling via POL output. Use Value: Enables full USB 3.1 Gen1 bandwidth and 1.5-A charging without external VCONN circuitry or discrete current-limiting FETs. |
Use Scenario: Compact AC/DC adapter delivering 5 V @ 1.5 A over USB-C with electronically marked cable support. IC Role / Device Role / Timing Role: TPS25820DSST serves as sole Type-C source controller, detecting sink attachment, advertising 1.5-A capability, and regulating VBUS with ±7% current accuracy. Use Value: Reduces bill-of-materials by integrating VBUS switch, VCONN switch, and CC logic - eliminates need for separate USB PD controller in fixed-5V applications. |
| LCD Monitor w/ USB Hub | Charging Cradle for Tablets |
Use Scenario: USB-C monitor with built-in hub providing video, data, and 1.5-A charging to connected laptop. IC Role / Device Role / Timing Role: TPS25820DSST controls VBUS power delivery and detects cable orientation to route SuperSpeed lanes correctly via POL-driven mux. Use Value: Ensures plug-and-play compatibility with both passive and electronically marked cables while maintaining USB-IF compliance. |
Use Scenario: Tablet cradle that charges via USB-C and maintains connection state during hot-plug cycles. IC Role / Device Role / Timing Role: TPS25820DSST monitors CC lines for attach/detach events, asserts SINK output on connection, and discharges VCONN within 90 ms per USB-C spec. Use Value: Guarantees reliable hot-plug detection and safe VCONN removal - prevents cable damage and port latch-up during frequent insertion/removal. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB Type-C source controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS25821DSST | No VCONN support; identical pinout, package, and VBUS functionality | Suitable only for USB 2.0 or data-less charging ports where VCONN is unnecessary | Select TPS25821DSST when designing cost-sensitive USB 2.0 DFPs without SuperSpeed or active cable requirements |
| FPF2280SGMT | Single-channel 5-V load switch (no CC logic, no VCONN, no sink detection) | Requires external microcontroller for CC management and role detection | Choose FPF2280SGMT only for simple 5-V pass-through applications lacking USB-C intelligence |
Compared with TPS25820DSST, TPS25821DSST removes VCONN capability but retains identical VBUS control and footprint - ideal for USB 2.0-only ports. FPF2280SGMT lacks all USB-C protocol logic, requiring full firmware implementation of CC monitoring and role negotiation, making it unsuitable as a direct functional alternative.
Availability
TPS25820DSST is available at Aetrix Electronics and suitable for USB-C docking stations, wall chargers, LCD monitors, and charging cradles requiring stable component supply, long-term lifecycle support, and guaranteed compliance with USB Type-C Release 1.3 specifications.
Supply support for TPS25820DSST 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 connectivity solutions, with decades of USB interface expertise and broad automotive, industrial, and consumer portfolio coverage.
The TPS25820DSST belongs to TI's USB Type-C source controller product line, engineered specifically for USB 3.1 DFP implementations requiring integrated VBUS switching, VCONN delivery, and full CC-line protocol compliance - not general-purpose power management.
FAQ
What is the primary function of the TPS25820DSST in a USB-C system?
The TPS25820DSST functions as a complete USB Type-C Downstream Facing Port (DFP) source controller with integrated VBUS and VCONN power switches. It detects sink attachment via CC lines, advertises 1.5-A current capability, applies VBUS power, delivers VCONN to electronically marked cables, and signals cable polarity via the POL output - all without requiring external microcontroller intervention. This makes TPS25820DSST essential for standalone USB 3.1-compliant DFP designs.
Does the TPS25820DSST support USB Power Delivery (PD) negotiation?
No, the TPS25820DSST does not support USB Power Delivery (PD) negotiation. It is designed exclusively for fixed 5-V USB Type-C source applications compliant with USB Type-C Release 1.3, supporting only standard and 1.5-A current advertisements over the CC line. PD communication - including variable voltage negotiation (e.g., 9 V, 15 V, 20 V) - requires a separate USB PD controller such as the TPS6598x series. The TPS25820DSST operates independently of PD and remains fully functional in non-PD systems like USB 2.0/3.1 chargers and docks.
How does the TPS25820DSST handle VCONN discharge after cable detachment?
The TPS25820DSST automatically discharges VCONN within 90 ms after cable detachment, meeting USB Type-C Release 1.3 requirements. When a powered cable is removed, the device activates its internal bleed discharge path (400–600 Ω) on the active CC pin, reducing VCONN voltage below 600 mV within specification. This rapid discharge prevents residual voltage from damaging the cable's e-marker IC or causing unsafe conditions during reinsertion. The TPS25820DSST confirms discharge completion using a 570–630 mV falling threshold with 100-mV hysteresis - a behavior verified in the SLVSE24C datasheet Section 6.5.
What is the purpose of the REF pin on the TPS25820DSST?
The REF pin on the TPS25820DSST sets the precise VBUS current limit threshold by accepting a voltage derived from a 100-kΩ resistor connected to GND. This resistor forms a reference network that biases the internal current-sense amplifier, directly determining the 1.7-A ±7% current limit value. Using a 0.5% tolerance, 100-ppm/°C resistor ensures stability across temperature and guarantees compliance with USB Type-C current-advertisement accuracy requirements. Omitting or misrouting the REF resistor results in undefined or out-of-spec current limiting behavior in the TPS25820DSST.
Can the TPS25820DSST be used in USB 2.0-only applications?
Yes, the TPS25820DSST is fully compatible with USB 2.0-only applications, though its VCONN capability is unused in such cases. It correctly detects sink attachment, applies VBUS, advertises current capability (via CHG pin), and provides robust overcurrent and thermal protection - all core requirements for USB 2.0 DFPs. However, for cost-optimized USB 2.0 designs where VCONN is never needed, the pin-compatible TPS25821DSST is recommended as it offers identical VBUS functionality at lower unit cost. Both devices share the same WSON-12 package and pinout.
TPS25820DSST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Controller
- Interface:
- USB
- Voltage - Supply:
- 4.5V ~ 5.5V
- Supplier Device Package:
- 12-WSON (3x2)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
TPS25820DSST FAQ
1.How can I place an order for TPS25820DSST through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS25820DSST 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 TPS25820DSST reliable?
The price and inventory of TPS25820DSST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS25820DSST is usually 5 days.
3.What payment methods are accepted for TPS25820DSST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS25820DSST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS25820DSST?
TPS25820DSST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS25820DSST 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 TPS25820DSST?
For technical support, including TPS25820DSST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS25820DSST requirements.
6.How does Aetrix verify that TPS25820DSST is sourced from the original manufacturer or authorized distributors?
All TPS25820DSST 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 TPS25820DSST meets industry standards.
7.What is the process for return or replacement of TPS25820DSST?
All TPS25820DSST units undergo pre-shipment inspection (PSI). If there is an issue with TPS25820DSST, 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 TPS25820DSST part is unused and in its original packaging.
Return procedure for TPS25820DSST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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