TPS2054BDG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments TPS2054BDG4 is a quad-channel USB power switch with 0.75 A to 1.25 A current-limit threshold per channel, operating up to 5.5 V with undervoltage lockout in a 16-pin SOIC package. It protects four USB downstream ports simultaneously with independent overcurrent flags and active-low enable inputs. Available from TI's standard supply chain worldwide.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- TPS2054BDG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TPS2054BDG4?
- 4 independent USB power switch channels each rated 0.75 A to 1.25 A current limit, protecting four downstream USB ports in one IC
- Undervoltage lockout (UVLO) disables all outputs when supply drops below the operational threshold, preventing USB enumeration errors
- Active-low enable inputs and open-drain fault flags per channel enable GPIO-controlled switching and interrupt-driven fault detection
What is TPS2054BDG4 used for?
The TPS2054BDG4 is designed for USB hub controllers, notebook docking stations, and industrial USB port expanders where four downstream ports require simultaneous power switching and overcurrent protection. Its 5.5 V maximum rating and 0.75 A to 1.25 A adjustable current limit per channel meet USB 2.0 standard port power specifications. Embedded systems designers use it in SBCs and IoT gateways to safely distribute 5 V bus power to USB peripherals while protecting the upstream supply from short-circuit faults.
What are the specifications of TPS2054BDG4?
| YTEOL | 0 |
| Additional Feature | UNDERVOLTAGE LOCKOUT |
| Adjustable Threshold | NO |
| Analog IC - Other Type | LOAD SWITCH |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Channels | 4 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 2.7V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the TPS2054BDG4 datasheet?
TPS2054BDG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS2054BDG4?
Compatible alternatives and drop-in replacements for TPS2054BDG4:
Texas Instruments Fixed, 4 Channel, PDSO16
Texas Instruments Fixed, 4 Channel, PDSO16
Frequently Asked Questions
What current-limit range does each TPS2054BDG4 channel provide and how is it set?
Each of the 4 channels in TPS2054BDG4 features an internal current-limit threshold between 0.75 A and 1.25 A, factory-set without an external resistor. When output current exceeds this threshold, the channel folds back to limit current and asserts the open-drain fault flag low, allowing the host GPIO to detect the overcurrent event. This fixed-threshold design simplifies BOM by eliminating current-setting resistors required on competing adjustable-threshold parts.
How does the undervoltage lockout in TPS2054BDG4 protect a USB hub during system power-up?
The TPS2054BDG4 integrates an undervoltage lockout (UVLO) circuit that holds all 4 output channels off when the supply voltage is below the UVLO threshold, preventing partial USB enumeration that can corrupt device state. As the supply ramps above the UVLO threshold toward 4.5 V to 5.5 V, the outputs enable in order, ensuring downstream devices receive a clean power-on reset. This is critical in notebook designs where the 5 V USB rail may sag during hard-drive spin-up or battery-to-AC transitions.
For a 4-port USB 2.0 hub, how does TPS2054BDG4 compare to using four discrete P-channel MOSFETs?
TPS2054BDG4 integrates 4 power switches, 4 current limiters, 4 fault flags, and undervoltage lockout in a single 16-pin SOIC, replacing 4 P-channel MOSFETs, 4 gate-drive resistors, 4 current-sense resistors, and 4 comparator ICs. The single-IC solution reduces PCB area by approximately 60%, lowers component count by 16 to 20 parts, and provides a known-characterized current-limit accuracy of ±25% versus discrete implementations that can vary by ±40% with MOSFET Rds(on) temperature drift.
What is the on-resistance of the TPS2054BDG4 switch channels at 5 V and how does it affect USB cable drop?
Each TPS2054BDG4 channel has a typical on-resistance of 90 mΩ at 5 V, producing a voltage drop of approximately 90 mV at the 1 A USB standard port current. Combined with the USB cable resistance (typically 300 mΩ for a 1 m cable), total I2R drop remains under 400 mV at full load, keeping the downstream USB connector voltage above the 4.75 V minimum required by USB 2.0 specification. The 16-pin SOIC package thermal resistance is 50°C/W, so the switch dissipates only 90 mW at 1 A, remaining well below thermal limits.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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