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Texas Instruments TPS2066D
- Part No.:
- TPS2066D
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2066D.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:2 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:536
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Product details
Overview
TPS2066D from Texas Instruments is a dual-channel, current-limited, high-side power-distribution switch featuring two 70 mΩ N-channel MOSFETs, 1 A continuous output per channel, thermal and short-circuit protection, and operation from 2.7 V to 5.5 V input supply - used in USB peripheral power management and hot-swap interfaces where inrush control and fault isolation are critical.
For engineers reviewing the TPS2066D datasheet, TPS2066D pinout, TPS2066D application, or TPS2066D equivalent, key selection criteria include per-channel current limit accuracy (1.1 A min / 1.9 A max), bidirectional switching capability, deglitched OC reporting, <1 μA standby current, and SOIC-8 package compatibility with board-level thermal management via PowerPAD™.
Technical Context
The TPS2066D integrates two independent high-side switches controlled by active-high enable inputs (EN1/EN2), each with dedicated overcurrent outputs (OC1/OC2) and internal charge-pump gate drive enabling full enhancement down to 2.7 V input. Its flat current-limit profile maintains constant 1.5 A typical output current under overload without peaking, distinguishing it from TPS2063/TPS2067 variants.
Each channel employs a sense FET for accurate current monitoring and fast response (<15 ms OC deglitch), while thermal shutdown activates at 135°C with 10°C hysteresis. The device uses no external components for gate drive and supports soft-start via controlled 0.6 ms typical rise time to suppress inrush surges into heavy capacitive loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Continuous Output Current | 1 A per channel - supports stable power delivery to USB peripherals, SSDs, and FPGA I/O banks without derating at 85°C ambient. |
| rDS(on) | 70 mΩ (typ) at 5 V - minimizes conduction loss (≤70 mW at 1 A), reducing thermal load on SOIC-8 package. |
| Input Voltage Range | 2.7 V to 5.5 V - enables direct integration with 3.3 V and 5 V system rails, including USB 2.0/3.0 VBUS domains. |
| Current Limit Threshold | 1.1 A (min) to 1.9 A (max) - ensures robust short-circuit tolerance while avoiding nuisance tripping during capacitor charging. |
| Rise Time | 0.6 ms (typ) - limits inrush di/dt to <1.7 A/ms, suppressing EMI and preventing upstream supply droop. |
| Standby Supply Current | 1 μA (max) - enables ultra-low-power state retention in battery-backed systems and always-on USB hubs. |
| Operating Temperature | -40°C to +85°C ambient - qualified for industrial and embedded computing environments with no derating. |
Pinout & Package
TPS2066D is housed in an 8-pin SOIC (D) package with exposed PowerPAD™ thermally connected to GND. The PowerPAD must be soldered to a PCB copper pour for effective heat dissipation and meets JEDEC MS-012AC standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power input rail | Common input for both channels; accepts 2.7–5.5 V; connects directly to system VBUS or DC-DC output. |
| GND | Ground reference | Primary ground return; internally tied to PowerPAD™ for thermal conduction and low-impedance noise path. |
| EN1 | Channel 1 enable | Active-high logic input; enables OUT1 when driven ≥2 V; compatible with 3.3 V/5 V CMOS/TTL. |
| EN2 | Channel 2 enable | Active-high logic input; enables OUT2 independently; allows staggered power-up of dual loads. |
| OC1 | Channel 1 fault flag | Open-drain output, active-low; asserts after 4–15 ms deglitch window upon sustained overcurrent or thermal fault. |
| OC2 | Channel 2 fault flag | Open-drain output, active-low; provides independent fault signaling for diagnostics and host controller interrupt handling. |
| OUT1 | Channel 1 switched output | High-side power output for load; features built-in soft-start and bidirectional blocking (no reverse current). |
| OUT2 | Channel 2 switched output | High-side power output for second load; electrically isolated from OUT1; supports independent current limiting. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional switch architecture | Prevents reverse current flow from OUT to IN during hot-plug or load discharge, eliminating need for external blocking diodes. |
| Accurate flat current limit | 1.5 A typical short-circuit current with ±0.4 A tolerance - avoids false trips during bulk capacitor charging while ensuring safe fault energy dissipation. |
| Integrated charge pump | Enables full MOSFET enhancement from 2.7 V input without external capacitors - simplifies BOM and layout for low-voltage systems. |
| Thermal shutdown with hysteresis | Shuts off at 135°C junction; auto-recovers at 125°C - protects against sustained overload without requiring system-level reset logic. |
| UL recognition (E169910) | Validated for end-equipment safety compliance in commercial and industrial applications without additional certification effort. |
Applications
| USB Peripheral Power Switching | Industrial Hot-Swap Interface |
|---|---|
Use Scenario: Powering USB 2.0/3.0 devices (keyboards, webcams, storage) from a shared 5 V rail with individual port disable and fault reporting. IC Role / Device Role / Timing Role: Dual high-side switch providing independent enable control, current limiting, and OC fault signaling per port. Use Value: Prevents bus-wide collapse during single-port short circuit; eliminates need for discrete fuses or PTCs; supports USB specification-compliant inrush control. |
Use Scenario: Insertion of field-replaceable modules (I/O cards, sensor nodes) into powered-backplane systems without disrupting main power. IC Role / Device Role / Timing Role: Controlled power ramp generator with soft-start and thermal foldback to manage insertion surge and sustain operation under partial faults. Use Value: Limits peak inrush to <1.7 A/ms; isolates faulty module without affecting other slots; enables automatic recovery after cooling. |
| Embedded System Load Management | Capacitor Charging Protection |
Use Scenario: Sequencing power to FPGA I/O banks, memory interfaces, or display backlights in portable medical or test equipment. IC Role / Device Role / Timing Role: Dual-channel programmable power gate with independent enable timing and fault monitoring. Use Value: Enables precise power-up sequencing via EN1/EN2 delay; OC1/OC2 signals feed microcontroller GPIO for real-time health monitoring. |
Use Scenario: Charging large bulk capacitors (>100 µF) in DC-DC post-regulation stages or PoE-powered devices. IC Role / Device Role / Timing Role: Inrush current limiter using controlled 0.6 ms rise time and flat current limit to prevent supply sag and MOSFET stress. Use Value: Reduces peak inrush by >80% vs. direct connection; eliminates voltage droop on shared 3.3 V/5 V rails; extends capacitor lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side power-switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2062DR | Same dual-channel architecture, identical pinout (SOIC-8), but EN inputs are active-low; rDS(on) and current limit specs match TPS2066D. | Requires inverted enable logic; suitable where host MCU GPIOs default high or pull-up bias is preferred. | Select TPS2062DR only if system-level enable polarity aligns with active-low control; otherwise, TPS2066D's active-high EN simplifies interface. |
| TPS2052BDR | Lower 0.5 A per-channel rating; 100 mΩ rDS(on); no thermal shutdown; OC output lacks deglitching; same SOIC-8 footprint. | Limited to low-power peripherals (LEDs, sensors); unsuitable for USB ports or >500 mA loads due to missing thermal protection. | Choose TPS2052BDR only for cost-sensitive, low-current applications where thermal fault coverage is not required. |
Compared with TPS2062DR and TPS2052BDR, the TPS2066D delivers superior fault resilience through integrated thermal shutdown and deglitched OC reporting, while its active-high enable simplifies direct interfacing with modern microcontrollers and PMICs - making it optimal for USB, hot-swap, and industrial load management where reliability and ease of use are prioritized.
Availability
TPS2066D is available at Aetrix Electronics and suitable for USB peripheral power distribution, industrial hot-swap interfaces, and embedded load sequencing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS2066D 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 expertise in high-reliability power-switch ICs.
The TPS206x family was designed specifically for robust, low-EMI power distribution in USB, docking stations, and industrial systems - emphasizing accurate current limiting, thermal safety, and seamless integration with 3.3 V/5 V logic domains.
FAQ
What is the maximum continuous current per channel for the TPS2066D?
The TPS2066D supports 1 A continuous output current per channel across the full -40°C to +85°C ambient temperature range, with thermal shutdown protecting against sustained overload. This rating is validated under recommended operating conditions with adequate PCB copper area for the PowerPAD™ thermal pad.
Does the TPS2066D require external components for gate drive or current sensing?
No, the TPS2066D integrates a charge pump for gate drive and a sense FET for current monitoring - eliminating the need for external capacitors, resistors, or op-amps. Only input/output bypass capacitors and optional pull-down resistors on EN1/EN2 are recommended for noise immunity.
How does the TPS2066D handle short-circuit events?
Upon detecting an overcurrent, the TPS2066D enters constant-current mode at ~1.5 A (typ), holding output current steady while reducing output voltage. If the fault persists, thermal shutdown activates at 135°C. OC1/OC2 assert low after a 4–15 ms deglitch window, providing clean fault signaling to the host controller.
Is the TPS2066D pin-compatible with other devices in the TPS206x family?
Yes - the TPS2066D shares the same SOIC-8 (D) package and pinout with TPS2062, TPS2065, and TPS2067. However, enable polarity differs: TPS2066D and TPS2065 use active-high EN, while TPS2062 and TPS2061 use active-low EN. Swapping requires logic-level verification.
What is the purpose of the PowerPAD™ on the TPS2066D package?
The PowerPAD™ is an exposed thermal pad on the underside of the SOIC-8 package, internally connected to GND. It must be soldered to a PCB copper pour to conduct heat away from the die - improving thermal resistance by up to 60% and enabling reliable 1 A operation at elevated ambient temperatures.
TPS2066D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- 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):
- 1A
- Rds On (Typ):
- 70mOhm
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS2066D FAQ
1.How can I place an order for TPS2066D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2066D 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 TPS2066D reliable?
The price and inventory of TPS2066D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2066D is usually 5 days.
3.What payment methods are accepted for TPS2066D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2066D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2066D?
TPS2066D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2066D 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 TPS2066D?
For technical support, including TPS2066D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2066D requirements.
6.How does Aetrix verify that TPS2066D is sourced from the original manufacturer or authorized distributors?
All TPS2066D 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 TPS2066D meets industry standards.
7.What is the process for return or replacement of TPS2066D?
All TPS2066D units undergo pre-shipment inspection (PSI). If there is an issue with TPS2066D, 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 TPS2066D part is unused and in its original packaging.
Return procedure for TPS2066D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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