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Texas Instruments TPS2149IDGN
- Part No.:
- TPS2149IDGN
- Manufacturer:
- Texas Instruments
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
TPS2149IDGN.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:2 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,325
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Product details
Overview
TPS2149IDGN 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 power switches (340 mΩ typical RDS(on)) in an 8-pin MSOP PowerPAD™ package. It delivers independent thermal/short-circuit protection, overcurrent flag with transient filtering, and operates from 2.9 V to 5.5 V - enabling compact, compliant USB 2.0 bus-powered hubs for keyboards, monitors, and hub boxes.
For engineers reviewing the TPS2149IDGN datasheet, TPS2149IDGN pinout, TPS2149IDGN application, or TPS2149IDGN equivalent, this device supports precise current-limited downstream port control, controlled switch rise/fall times to suppress EMI, active-low enable logic compatible with 3-V/5-V systems, and integrated LDO output switching for USB controller power sequencing.
Technical Context
The TPS2149IDGN implements dual N-channel high-side MOSFETs with independent EN1/EN2 enables and shared VIN input, each rated for 150 mA continuous output with 200 mA current limiting. Its internal 3.3-V LDO features 0.35 V dropout at 200 mA and uses a dedicated LDO_OUT pin for USB controller supply.
Thermal protection employs dual thresholds: first-trip shutdown at ~120°C isolates only the faulted switch, while second-trip at 155°C disables all outputs. Overcurrent detection uses a sense FET (not shunt resistor), with OC open-drain flag asserting after 5.5 ms delay and deasserting after 10.5 ms post-fault clearance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO Output | 3.3 V ±3% at 200 mA load; supplies USB controller and pull-up resistors directly. |
| Switch RDS(on) | 340 mΩ typ (25°C); limits conduction loss and self-heating under 150 mA load. |
| Output Current Limit | 200 mA per switch; holds constant-current during overload without latch-off. |
| Enable Logic | Active-low EN1/EN2; TTL/CMOS-compatible; allows enumeration-controlled port power-up. |
| OC Response Delay | 5.5 ms assertion / 10.5 ms deassertion; filters inrush transients to prevent false trips. |
| UVLO Threshold | 2.2–2.85 V with 260 mV hysteresis; ensures clean startup and hot-plug safety. |
| Operating Temp | −40°C to 85°C ambient; junction-rated to 100°C for sustained 150 mA operation. |
Pinout & Package
TPS2149IDGN is housed in an 8-pin HVSSOP (DGN) package with exposed thermal pad (PowerPAD™), optimized for thermal dissipation in space-constrained USB hub PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT1 (Pin 1) | Switch 1 output | Delivers regulated 5-V power to first downstream USB port; current-limited and thermally protected. |
| VIN (Pin 2) | Input supply | Shared input for LDO and both switches; accepts 2.9–5.5 V USB bus voltage. |
| LDO_OUT (Pin 3) | LDO output | Provides stable 3.3 V for USB controller IC and 1.5-kΩ D+ pull-up resistor. |
| OUT2 (Pin 4) | Switch 2 output | Delivers regulated 5-V power to second downstream USB port; independently enabled and protected. |
| GND (Pin 5) | Ground reference | Common return for LDO, switches, and OC signal; connects to PowerPAD™ for thermal path. |
| OC (Pin 6) | Overcurrent flag | Open-drain output asserted low during overload or thermal fault on either switch. |
| EN2 (Pin 7) | Switch 2 enable | Active-low logic input; controls power delivery to OUT2 independent of EN1. |
| EN1 (Pin 8) | Switch 1 enable | Active-low logic input; enables/disables OUT1 for port-level power sequencing during enumeration. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LDO + dual switches | Reduces board area by up to 60% vs discrete solutions; eliminates external LDO and two MOSFET drivers. |
| Independent thermal protection | First-trip at ~120°C shuts down only the faulted switch, preserving operation of the other port. |
| Controlled switch timing | Rise/fall times (0.1–5 ms) minimize inrush current and EMI during hot-plug events. |
| Sense-FET current monitoring | Enables accurate, low-loss current limiting without added series resistance or power loss. |
| UVLO with hysteresis | Prevents erratic operation during brown-out; 260 mV hysteresis avoids oscillation near threshold. |
Applications
| USB Bus-Powered Hub | Keyboard Hub Module |
|---|---|
Use Scenario: Two-port USB 2.0 hub drawing power solely from upstream host port. IC Role / Device Role / Timing Role: TPS2149IDGN 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 BPH requirements: <100 mA initial draw, inrush limiting, and per-port current limiting to 200 mA. | Use Scenario: Compact keyboard with integrated USB hub supporting multiple peripherals (mouse, flash drive). IC Role / Device Role / Timing Role: TPS2149IDGN powers the embedded hub controller via LDO_OUT and gates 5-V power to auxiliary ports using EN1/EN2. Use Value: Enables zero-layout-change integration of hub functionality into space-constrained keyboard PCBs. |
| Monitor-Integrated Hub | USB Hub Box |
Use Scenario: Display with built-in USB 2.0 hub for connecting peripherals via monitor's USB-B upstream port. IC Role / Device Role / Timing Role: TPS2149IDGN supplies 3.3 V to hub IC and delivers controlled 5-V power to two downstream Type-A ports. Use Value: Satisfies USB BPH power budget (≤500 mA total) while providing independent port disable for power management. | Use Scenario: Standalone desktop USB hub box with two downstream ports and LED indicators. IC Role / Device Role / Timing Role: TPS2149IDGN manages power distribution, overcurrent reporting (via OC), and thermal safety across both ports. Use Value: Eliminates need for external current-sense resistors and discrete protection ICs, reducing BOM count and cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB bus-powered hub applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2159IDGN | Identical pinout and specs, but with active-high EN1/EN2 logic instead of active-low. | Requires inverted enable signals from hub controller; not drop-in compatible with TPS2149IDGN firmware/hardware. | Select TPS2159IDGN only when system logic naturally drives high-enable signals. |
| TPS2148IDGN | MSOP-8 variant with LDO_EN pin and separate LDO output switch; lacks shared VIN/LDO input architecture. | Supports independent LDO enable and output switching, enabling more flexible power sequencing than TPS2149IDGN. | Choose TPS2148IDGN when LDO must be disabled separately from switch inputs or when LDO output switching is required. |
Compared with TPS2159IDGN and TPS2148IDGN, the TPS2149IDGN offers fixed active-low enable logic and integrated LDO-input sharing - simplifying design for standard USB BPH implementations where enumeration-driven port enable timing is critical and LDO always tracks VIN.
Availability
TPS2149IDGN is available at Aetrix Electronics and suitable for USB bus-powered hubs, keyboard-integrated peripherals, and monitor-embedded USB expansion requiring stable component supply, full production traceability, and long-term lifecycle support.
Supply support for TPS2149IDGN 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, efficiency, and system-level integration.
The TPS214x/215x family was designed specifically for USB bus-powered hub power management - integrating LDO regulation, dual high-side switching, and fault protection in minimal footprint packages to meet USB 2.0 compliance requirements.
FAQ
What is the maximum continuous output current per switch in the TPS2149IDGN?
The TPS2149IDGN supports 150 mA continuous output current per switch (OUT1 and OUT2) under recommended operating conditions. Its current-limit threshold is specified at 200 mA, allowing temporary overload handling without shutdown. This rating assumes proper thermal management - including use of the PowerPAD™ thermal pad and adherence to the 684.9 mW power limit at 70°C ambient.
Does the TPS2149IDGN require external capacitors, and if so, what values are recommended?
Yes, the TPS2149IDGN requires external capacitors for stability and transient performance. A 0.01–0.1 µF ceramic bypass capacitor must be placed close between VIN and GND. A 4.7 µF minimum output capacitor (ESR 200 mΩ–10 Ω) is required on LDO_OUT. For OUT1/OUT2, a 66 µF bulk capacitor plus 0.1 µF ceramic bypass is recommended to manage inrush and short-circuit transients.
How does the OC pin function in the TPS2149IDGN, and what triggers it?
The OC pin in the TPS2149IDGN is an open-drain output that asserts low when either OUT1 or OUT2 experiences overcurrent or overtemperature. It remains asserted until the fault condition clears. The response includes a 5.5 ms assertion delay and 10.5 ms deassertion delay to filter transient inrush currents - eliminating need for external RC filtering components.
Can the TPS2149IDGN be used in USB 3.0 applications?
No, the TPS2149IDGN is designed and specified for USB 2.0 bus-powered hub applications only. While its 5-V power switching and current limiting remain functional, it does not meet USB 3.0 power delivery specifications, nor does its LDO output support the higher-speed signaling or additional power rail requirements of SuperSpeed USB. TI recommends evaluating dedicated USB 3.x power switches for such designs.
What is the purpose of the undervoltage lockout (UVLO) in the TPS2149IDGN?
The UVLO in the TPS2149IDGN prevents operation below ~2.2–2.85 V input, ensuring reliable startup and hot-plug safety. It forces the LDO and switches into a known off state during brown-out or insufficient bus voltage, avoiding erratic behavior. With 260 mV hysteresis, it prevents oscillation near the threshold and supports robust reinsertion in dynamic USB environments.
TPS2149IDGN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width) Exposed Pad
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- 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
TPS2149IDGN FAQ
1.How can I place an order for TPS2149IDGN through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2149IDGN 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 TPS2149IDGN reliable?
The price and inventory of TPS2149IDGN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2149IDGN is usually 5 days.
3.What payment methods are accepted for TPS2149IDGN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2149IDGN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2149IDGN?
TPS2149IDGN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2149IDGN 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 TPS2149IDGN?
For technical support, including TPS2149IDGN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2149IDGN requirements.
6.How does Aetrix verify that TPS2149IDGN is sourced from the original manufacturer or authorized distributors?
All TPS2149IDGN 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 TPS2149IDGN meets industry standards.
7.What is the process for return or replacement of TPS2149IDGN?
All TPS2149IDGN units undergo pre-shipment inspection (PSI). If there is an issue with TPS2149IDGN, 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 TPS2149IDGN part is unused and in its original packaging.
Return procedure for TPS2149IDGN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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