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Texas Instruments TPS2056D
- Part No.:
- TPS2056D
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2056D.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:2 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,019
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Product details
Overview
TPS2056D from Texas Instruments is a dual-channel, active-high enable, current-limited high-side power-distribution switch featuring two 135-mΩ N-channel MOSFETs, 250 mA continuous per channel, 0.44 A short-circuit current limit at 25°C, and operation from 2.7 V to 5.5 V - used for USB peripheral power control and hot-insertion protection in notebook PCs and digital cameras.
For engineers reviewing the TPS2056D datasheet, TPS2056D pinout, TPS2056D application, or TPS2056D equivalent, this page delivers verified electrical parameters, SOIC-8 package mapping, thermal/overcurrent protection behavior, and real-world design implications for USB-compliant load switching and fault-isolated power rail management.
Technical Context
The TPS2056D integrates two independent high-side switches with internal charge-pump gate drive enabling full operation down to 2.7 V input; each channel features dedicated overcurrent logic output (OC1/OC2) and thermal shutdown with dual-threshold trip (140°C primary, 160°C secondary).
Its enable inputs are active-high (EN1/EN2), contrasting with the active-low TPS2046D; both channels share a common IN supply and GND, but operate autonomously under overload - one channel can shut down thermally while the other remains functional.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Current per Channel | 250 mA - supports sustained USB bus-powered peripheral loads without derating at 85°C ambient. |
| Short-Circuit Current Limit | 0.44 A at 25°C - clamps fault current to prevent trace damage and upstream supply collapse during hot-plug shorts. |
| On-Resistance (rDS(on)) | 135 mΩ max at 5 V, 25°C - yields ≤110 mV drop at 250 mA, minimizing voltage loss in 5-V power rails. |
| Input Voltage Range | 2.7 V to 5.5 V - enables use with Li-ion battery (3.3 V) and USB 5-V supplies without external regulation. |
| Rise/Fall Time | 2.5 ms / 4.4 ms typical (5.5 V, 1 µF load) - limits inrush dI/dt to reduce EMI and avoid false OC triggering. |
| Standby Supply Current | 10 µA max - allows low-power sleep-state retention in portable systems with enabled but inactive switches. |
| Operating Ambient Range | –40°C to +85°C - qualified for industrial and consumer embedded environments including laptop docking stations. |
Pinout & Package
TPS2056D is housed in an 8-pin SOIC (D) package with standard 1.27 mm pitch, surface-mount footprint, and thermal pad omitted - suitable for compact PCB layouts in space-constrained USB hubs and peripherals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - GND | Power Ground Reference | Common return path for internal charge pump, driver, and thermal sense circuits; must be low-impedance connection. |
| 2 - IN | Main Power Input | Supplies both channels; accepts 2.7–5.5 V; requires local 0.1 µF ceramic bypass capacitor. |
| 3 - EN1 | Channel 1 Enable Input | Active-high logic input; TTL/CMOS compatible; disables switch and reduces supply current to ≤10 µA when low. |
| 4 - EN2 | Channel 2 Enable Input | Independent active-high control; allows staggered power-up of downstream loads to limit inrush. |
| 5 - OC2 | Channel 2 Overcurrent Output | Open-drain, active-low flag; asserts during overcurrent or thermal fault; requires external pull-up to monitor status. |
| 6 - OUT2 | Channel 2 Power Output | Switched 250 mA output; connects to load; voltage follows IN minus I×rDS(on) in normal operation. |
| 7 - OUT1 | Channel 1 Power Output | Independent switched output; electrically isolated from OUT2; supports dual-rail or redundant load control. |
| 8 - OC1 | Channel 1 Overcurrent Output | Dedicated fault indicator; enables per-channel diagnostics in USB host controllers or microcontroller GPIO monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Independent Thermal Protection | Dual-threshold shutdown (140°C per channel, 160°C global) isolates faults without disabling healthy channel - critical for multi-port USB hubs. |
| Integrated Charge Pump | Enables full 2.7 V operation without external components; eliminates need for bootstrap capacitors or higher-voltage gate drivers. |
| Controlled Switching Transients | 2.5–4.4 ms rise/fall times minimize EMI and prevent false OC assertions during hot-plug events with large capacitive loads. |
| Undervoltage Lockout (UVLO) | Shuts off switches below ~2 V; prevents erratic behavior during brownout or partial power-up - essential for robust hot-insertion. |
| ESD Robustness | 2-kV HBM / 200-V MM rating - withstands handling and system-level ESD events in consumer electronics assembly and field use. |
Applications
| USB Bus-Powered Hub | Portable Digital Camera |
|---|---|
|
Use Scenario: Distributing 5-V power to four downstream USB ports from a single upstream port while limiting total draw to 500 mA. IC Role / Device Role / Timing Role: Dual-channel power switch controlling VBUS to two port groups; EN1/EN2 sequenced to manage inrush during enumeration. Use Value: Prevents upstream port shutdown during plug-in transients; OC1/OC2 signals feed hub controller for per-port fault isolation. |
Use Scenario: Enabling/disabling flash LED and SD card interface independently to conserve battery during standby. IC Role / Device Role / Timing Role: High-side load switch managing 3.3-V and 5-V rails; active-high EN pins synchronized with MCU GPIO states. Use Value: Reduces quiescent current to <10 µA when disabled; 135-mΩ rDS(on) avoids voltage droop on sensitive imaging sensors. |
| Notebook PC Docking Station | Industrial Human-Machine Interface (HMI) |
|
Use Scenario: Providing hot-pluggable 5-V power to external monitors, keyboards, and scanners via mini-DP/USB-C expansion ports. IC Role / Device Role / Timing Role: Dual-switch IC delivering fault-isolated power to two independent peripheral zones; UVLO ensures clean power-on sequencing. Use Value: Thermal independence allows one port to survive short-circuit while others remain operational - improves system uptime. |
Use Scenario: Controlling power to touch-screen controller and RS-485 transceiver in a factory-floor panel PC with strict EMC requirements. IC Role / Device Role / Timing Role: EMI-optimized power switch with controlled 2.5-ms rise time; OC outputs wired to PLC diagnostic inputs. Use Value: Meets IEC 61000-4-2 Level 3 ESD immunity; 2.7–5.5 V range accommodates wide-input DC-DC converters in industrial power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel power-distribution switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2046D | Active-low enable inputs; identical rDS(on), current limit, and thermal behavior. | Requires inverted logic control signal; preferred where MCU GPIO defaults to high or system uses active-low reset architecture. | Select TPS2046D if existing firmware or logic levels mandate active-low enable; same SOIC-8 footprint and thermal performance. |
| TPD3S014RGER | Single-channel, integrated USB data-line ESD protection + 1.5-A load switch; no dual-channel or OC outputs. | Targets USB Type-C port protection only; lacks independent channel control and fault reporting capability. | Choose TPD3S014RGER only for cost-sensitive single-port designs needing combined ESD + power switch; not a functional replacement for dual-rail control. |
Compared with TPS2056D, TPS2046D offers identical power-switch performance but inverted enable polarity - ideal for legacy logic interfaces - while TPD3S014RGER trades channel count and diagnostics for integrated USB data-line protection, making it unsuitable for multi-rail isolation or per-channel fault monitoring.
Availability
TPS2056D is available at Aetrix Electronics and suitable for USB peripheral power management, notebook docking stations, and industrial HMI systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS2056D 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 high-reliability power distribution solutions.
The TPS20xx family was designed specifically for USB-compliant hot-plug power switching - delivering fault-isolated, current-limited, and thermally protected high-side control in compact SOIC packages for portable and industrial systems.
FAQ
What is the enable logic polarity of the TPS2056D?
The TPS2056D features active-high enable inputs (EN1 and EN2). A logic high (≥2 V) turns on the corresponding channel's power switch, while a logic low (≤0.4 V at 2.7–4.5 V input) disables it and reduces supply current to ≤10 µA. This differs from the TPS2046D, which uses active-low enables - confirming correct logic level alignment is essential before PCB layout.
Does the TPS2056D support 3.3-V input operation?
Yes, the TPS2056D operates across 2.7 V to 5.5 V, including nominal 3.3-V supplies. At 3.3 V and 25°C, its typical rDS(on) is 105 mΩ, yielding ~26 mV drop at 250 mA - well within USB voltage tolerance. The internal charge pump ensures reliable gate drive even at minimum input, eliminating need for external boost circuitry.
How does the TPS2056D respond to a short circuit on one channel?
When a short occurs on OUT1 or OUT2, the TPS2056D immediately enters constant-current mode (0.44 A at 25°C), pulling the respective OC1 or OC2 pin low. If thermal buildup reaches ~140°C, only the affected channel shuts down - the other remains fully operational. Recovery is automatic after cooling by ~20°C, enabling fault containment without system-wide reset.
Can the TPS2056D be used in USB 2.0 applications?
Yes, the TPS2056D is widely deployed in USB 2.0 bus-powered hubs and peripherals. Its 250 mA per channel supports low-power functions (≤100 mA) and high-power functions post-enumeration (≤500 mA total), while controlled 2.5-ms rise time meets USB inrush current limits and minimizes EMI on shared data lines.
What is the maximum junction temperature and thermal resistance for the TPS2056D in SOIC-8 package?
The TPS2056D has a maximum virtual junction temperature of 125°C. In the SOIC-8 (D) package, its thermal resistance θJA is 172°C/W. At 250 mA and 5 V input, worst-case power dissipation is ~8.4 mW (135 mΩ × 0.25²), resulting in <2°C junction-to-ambient rise - well within safe operating limits even at 85°C ambient.
TPS2056D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Switch Type:
- General Purpose
- Number of Outputs:
- 2
- Ratio - Input:Output:
- 1:2
- 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):
- 250mA
- 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
TPS2056D FAQ
1.How can I place an order for TPS2056D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2056D 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 TPS2056D reliable?
The price and inventory of TPS2056D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2056D is usually 5 days.
3.What payment methods are accepted for TPS2056D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2056D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2056D?
TPS2056D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2056D 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 TPS2056D?
For technical support, including TPS2056D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2056D requirements.
6.How does Aetrix verify that TPS2056D is sourced from the original manufacturer or authorized distributors?
All TPS2056D 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 TPS2056D meets industry standards.
7.What is the process for return or replacement of TPS2056D?
All TPS2056D units undergo pre-shipment inspection (PSI). If there is an issue with TPS2056D, 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 TPS2056D part is unused and in its original packaging.
Return procedure for TPS2056D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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