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Texas Instruments TPS2149IDGNR
- Part No.:
- TPS2149IDGNR
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
TPS2149IDGNR.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:2 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,311
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Product details
Overview
TPS2149IDGNR from Texas Instruments is a USB bus-powered hub power management IC integrating a 3.3-V/200-mA LDO regulator and two independent 5-V high-side MOSFET power switches in an MSOP-8 PowerPAD package. It delivers controlled 3.3-V supply for USB controllers and 5-V downstream port power with independent enable logic, thermal/short-circuit protection, and overcurrent flag reporting - enabling compact, compliant USB 2.0 bus-powered hubs.
For engineers reviewing the TPS2149IDGNR datasheet, TPS2149IDGNR pinout, TPS2149IDGNR application, or TPS2149IDGNR equivalent, this page provides verified functional identity, validated pin functions, confirmed USB 2.0 hub compliance, exact thermal shutdown thresholds (120°C first trip, 155°C second trip), and real-world current-limit behavior (200–400 mA per switch) - all extracted from TI's SLVS401 datasheet.
Technical Context
The TPS2149IDGNR implements dual N-channel high-side MOSFETs (rDS(on) = 340 mΩ typ at 25°C, 680 mΩ max over temp) with independent active-low EN1/EN2 enables compatible with both 3-V and 5-V logic. Its integrated 3.3-V LDO features 0.35-V dropout at 200 mA and built-in undervoltage lockout (UVLO threshold 2.2–2.85 V, 260-mV hysteresis).
Each switch includes dedicated current-sense FETs, transient-filtered open-drain OC flag assertion (5.5-ms delay to assert, 10.5-ms to deassert), and dual-threshold thermal protection: individual switch shutdown at ~120°C with ~10°C hysteresis, plus full-device shutdown at 155°C - ensuring fault isolation without disrupting adjacent ports during overload.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 2.9 V to 5.5 V - supports full USB 2.0 bus voltage tolerance with UVLO preventing operation below 2.2 V. |
| LDO output | 3.3 V ±3% at 200 mA - supplies USB controller core logic and pull-up resistors with 0.35-V dropout. |
| Switch output current | 150 mA continuous per OUT1/OUT2 - meets USB bus-powered hub downstream port steady-state requirement. |
| Current limit threshold | 200–400 mA per switch - programmable via internal sense FET; holds constant current during overload instead of hard shutdown. |
| Thermal shutdown | 120°C (per-switch), 155°C (full-device) - enables fault containment while maintaining upstream functionality. |
| Enable logic | Active-low EN1/EN2 - allows enumeration control: ports remain unpowered until hub completes USB reset handshake. |
| OC flag response | Open-drain, 5.5-ms assertion delay - filters inrush transients to prevent false overcurrent reporting on hot-plug events. |
Pinout & Package
TPS2149IDGNR uses an 8-pin MSOP package with exposed thermal pad (PowerPAD™), optimized for thermal performance in space-constrained USB hub PCB layouts. The package measures 3.0 mm × 3.0 mm × 1.0 mm (max height) with 0.65-mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN1 (Pin 8) | Active-low enable for Switch 1 | Drives OUT1 only; TTL/CMOS-compatible; must be pulled low to activate 5-V power to downstream port 1. |
| EN2 (Pin 7) | Active-low enable for Switch 2 | Drives OUT2 only; independent of EN1 - enables per-port power sequencing during USB enumeration. |
| GND (Pin 5) | Power and signal reference | Common return path for LDO, switches, and OC; connects to PowerPAD for thermal dissipation. |
| LDO_OUT (Pin 3) | 3.3-V regulated output | Supplies USB controller IC and 1.5-kΩ D+ pull-up resistor; requires ≥4.7 µF output capacitor with 200 mΩ–10 Ω ESR. |
| OC (Pin 6) | Overcurrent status flag | Open-drain output asserted low during overload or thermal fault on either switch; internally filtered to reject <50-µs transients. |
| OUT1 (Pin 1) | Switch 1 output | Delivers 5-V power to first downstream USB port; rated for 150 mA continuous, 400 mA short-circuit limit. |
| OUT2 (Pin 4) | Switch 2 output | Delivers 5-V power to second downstream USB port; electrically isolated from OUT1 under thermal fault. |
| VIN (Pin 2) | Input supply | Accepts 5-V USB bus input; feeds both LDO and dual high-side switches; requires 0.01–0.1 µF ceramic + 4.7 µF bulk bypass. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB-compliant power architecture | Combines 3.3-V LDO + dual 5-V switches in one MSOP-8 - eliminates discrete regulators, MOSFETs, and protection ICs, saving >60% board area vs. discrete solutions. |
| Independent per-switch thermal protection | First-trip shutdown at ~120°C isolates faulty port only; adjacent port remains powered - critical for multi-port hub reliability. |
| Controlled switching transitions | Rise/fall times (0.1–5 ms) and turn-on/off delays (0.1–10 ms) minimize inrush current and EMI - satisfies USB 2.0 hot-plug inrush limits (<44 Ω effective impedance). |
| Transient-immune overcurrent detection | Internal OC filter rejects sub-50-µs current spikes - avoids false trips during capacitor charging, eliminating need for external RC snubbers. |
| Low quiescent current | 75 µA typical supply current - reduces standby power loss in always-on USB hub applications. |
Applications
| USB Bus-Powered Hub | Keyboard with Integrated Hub |
|---|---|
|
Use Scenario: Two-port USB 2.0 hub drawing power solely from upstream USB host port. IC Role / Device Role / Timing Role: TPS2149IDGNR provides 3.3-V LDO power to hub controller and independently enables 5-V power to each downstream port after enumeration. Use Value: Meets USB 2.0 bus-powered hub requirements: <100 mA initial power-up, per-port enable/disable, and overcurrent reporting via OC pin. |
Use Scenario: Full-size keyboard with two USB downstream ports for mouse and flash drive. IC Role / Device Role / Timing Role: TPS2149IDGNR powers keyboard MCU (via LDO_OUT) and selectively energizes auxiliary ports (via OUT1/OUT2) only when devices are attached. Use Value: Enables zero-power standby for unused ports - extends system-level energy efficiency without firmware intervention. |
| Monitor with USB Hub | USB Hub Box (Desktop Dock) |
|
Use Scenario: LCD monitor embedding USB 2.0 hub for peripheral connectivity. IC Role / Device Role / Timing Role: TPS2149IDGNR supplies 3.3-V logic power to hub IC and delivers regulated 5-V to downstream ports with independent thermal fault containment. Use Value: Prevents single-port short circuit from disabling video or audio functions - maintains monitor usability during peripheral faults. |
Use Scenario: Compact desktop dock providing four USB 2.0 ports from single upstream connection. IC Role / Device Role / Timing Role: TPS2149IDGNR manages power to two downstream ports (paired with second TPS2149IDGNR for remaining ports); OC flag feeds system-level fault indicator LED. Use Value: Dual-threshold thermal protection ensures dock remains partially functional even if one port sustains sustained overload. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB bus-powered hub power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2159IDGN | Pin-compatible variant with active-high EN1/EN2 enables (vs. active-low on TPS2149IDGNR). | Requires inverted enable logic from hub controller; otherwise identical LDO, switch specs, and protection features. | Select TPS2159IDGN when MCU GPIOs lack open-drain capability or require active-high control signaling. |
| TPS2051BDR | Single-channel 5-V 500-mA power switch (no integrated LDO); SOIC-8 package; no OC flag or thermal trip per channel. | Requires external 3.3-V regulator and separate overcurrent monitoring; suitable only for simpler single-port or non-hub applications. | Choose TPS2051BDR only for cost-sensitive, single-output designs where LDO integration and per-port thermal isolation are unnecessary. |
Compared with TPS2159IDGN, TPS2149IDGNR offers direct compatibility with standard USB enumeration firmware that asserts low enables post-reset; versus TPS2051BDR, it delivers complete hub power architecture - reducing BOM count by 4+ components and enabling fault-isolated multi-port operation.
Availability
TPS2149IDGNR is available at Aetrix Electronics and suitable for USB bus-powered hubs, keyboard-integrated hubs, monitor-embedded USB interfaces, and desktop docking stations requiring stable component supply across industrial temperature ranges (−40°C to 85°C).
Supply support for TPS2149IDGNR 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, serving automotive, industrial, and communications markets since 1930.
The TPS2149IDGNR belongs to TI's USB power distribution switch family, designed specifically to meet USB 2.0 bus-powered hub requirements - integrating LDO regulation, dual high-side switching, and intelligent fault protection in minimal footprint.
FAQ
What is the primary function of the TPS2149IDGNR in a USB system?
The TPS2149IDGNR serves as a complete power management solution for USB bus-powered hubs. It integrates a 3.3-V/200-mA LDO to power the USB controller and two independent 5-V high-side MOSFET switches to deliver power to downstream ports. Its design ensures USB 2.0 compliance through controlled inrush, per-port enable/disable, and overcurrent reporting - all within a single MSOP-8 PowerPAD package.
Does the TPS2149IDGNR support USB 2.0 bus-powered hub requirements?
Yes, the TPS2149IDGNR explicitly meets USB 2.0 bus-powered hub requirements. It enables <100 mA initial power-up via independent EN1/EN2 control, provides integrated current limiting (200–400 mA per switch), delivers overcurrent status via the OC pin, and incorporates controlled rise/fall times to limit inrush current - satisfying the USB specification's electrical and timing mandates for bus-powered hubs.
What thermal protection mechanisms does the TPS2149IDGNR implement?
The TPS2149IDGNR implements dual-threshold thermal protection: a first trip at ~120°C shuts down only the overloaded switch while leaving the other operational, and a second trip at 155°C disables the entire device. Hysteresis of ~10°C enables automatic recovery after cooling. This architecture ensures fault containment - critical for maintaining hub functionality when one downstream port experiences sustained overload or short circuit.
How does the OC pin on the TPS2149IDGNR behave during overcurrent events?
The OC pin on the TPS2149IDGNR is an open-drain output asserted low during overcurrent or thermal fault on either OUT1 or OUT2. It features a 5.5-ms delay to assert and 10.5-ms delay to deassert, filtering transient inrush currents. The internal transient filter eliminates false triggering during hot-plug events, removing the need for external RC networks - simplifying layout and improving system reliability.
What are the key differences between TPS2149IDGNR and TPS2159IDGN?
The TPS2149IDGNR and TPS2159IDGN are pin-compatible variants differing only in enable polarity: TPS2149IDGNR uses active-low EN1/EN2, while TPS2159IDGN uses active-high enables. All other specifications - LDO output, switch RDS(on), current limits, thermal thresholds, OC behavior, and package - are identical. Firmware must invert enable signals when substituting TPS2159IDGN for TPS2149IDGNR.
TPS2149IDGNR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Switch Type:
- USB Switch
- Number of Outputs:
- 2
- Ratio - Input:Output:
- 1:2
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 2.9V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 200mA
- Rds On (Typ):
- 340mOhm
- Input Type:
- Non-Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 100°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-HVSSOP
TPS2149IDGNR FAQ
1.How can I place an order for TPS2149IDGNR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2149IDGNR 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 TPS2149IDGNR reliable?
The price and inventory of TPS2149IDGNR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2149IDGNR is usually 5 days.
3.What payment methods are accepted for TPS2149IDGNR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2149IDGNR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2149IDGNR?
TPS2149IDGNR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2149IDGNR 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 TPS2149IDGNR?
For technical support, including TPS2149IDGNR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2149IDGNR requirements.
6.How does Aetrix verify that TPS2149IDGNR is sourced from the original manufacturer or authorized distributors?
All TPS2149IDGNR 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 TPS2149IDGNR meets industry standards.
7.What is the process for return or replacement of TPS2149IDGNR?
All TPS2149IDGNR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2149IDGNR, 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 TPS2149IDGNR part is unused and in its original packaging.
Return procedure for TPS2149IDGNR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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