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Texas Instruments TPS2046BDR
- Part No.:
- TPS2046BDR
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2046BDR.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:2 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,834
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Product details
Overview
TPS2046BDR from Texas Instruments is a dual-channel, current-limited, high-side power-distribution switch in SOIC-8 (D-8) package. It integrates two 70-mΩ N-channel MOSFETs, delivers 250 mA continuous per channel, operates from 2.7 V to 5.5 V, and features independent active-low enable inputs (EN1/EN2), overcurrent reporting (OC1/OC2), and thermal shutdown - used in USB bus-powered hubs and peripheral power rail control.
For engineers reviewing the TPS2046BDR datasheet, TPS2046BDR pinout, TPS2046BDR application, or TPS2046BDR equivalent, key selection criteria include per-channel current limiting (0.3–0.7 A), low quiescent supply current (≤1 μA disabled), undervoltage lockout (2.0–2.5 V threshold), deglitched OC outputs, and SOIC-8 thermal performance under capacitive load switching.
Technical Context
The TPS2046BDR implements dual independent high-side switches with internal charge-pump gate drive enabling full enhancement down to 2.7 V input. Each channel includes dedicated current-sense FET, thermal shutdown circuitry (trip at 135°C, hysteresis 10°C), and deglitched open-drain OC outputs with 4–15 ms assertion/deassertion timing.
It uses active-low logic enables (EN1/EN2), supports bidirectional current flow during fault conditions, and incorporates undervoltage lockout that disables output until VIN exceeds ~2.0 V - critical for hot-plug USB compliance and inrush control in bus-powered systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Dual independent high-side power switches - enables isolated control of two downstream USB ports or peripheral rails. |
| Continuous Current per Channel | 250 mA - supports USB low-power function enumeration and sustained operation within Class 1 unit-load limits. |
| rDS(on) | 70 mΩ (typical @ 5 V, 25°C) - minimizes voltage drop and power loss at full rated load; enables use in compact SOIC-8 without external heatsinking. |
| Current Limit Range | 0.3 A (min) to 0.7 A (max) - ensures robust short-circuit protection while accommodating process and temperature variation across operating range. |
| Enable Logic Polarity | Active-low (EN1/EN2) - matches standard USB hub controller enable signaling and simplifies interface with microcontrollers lacking active-high drive capability. |
| OC Output Type | Open-drain, active-low, deglitched (4–15 ms timeout) - eliminates false fault reporting during capacitive inrush; interfaces directly with 3.3 V/5 V microcontroller GPIOs. |
| Supply Voltage Range | 2.7 V to 5.5 V - supports operation from single Li-ion cells (3.0–3.6 V), USB VBUS (4.75–5.25 V), and regulated 3.3 V rails. |
Pinout & Package
TPS2046BDR is packaged in SOIC-8 (D-8) with standard 1.27 mm pitch, 5.0 mm × 6.2 mm body, and exposed pad not present. Pinout validated per TI SLVS532C datasheet Figure 3 (TPS2046B D-package top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference for internal charge pump, current sense, and thermal sensing - must be low-impedance connection to system ground plane. |
| 2 | IN | Common input voltage rail for both channels - accepts 2.7–5.5 V; requires local 0.1 µF ceramic bypass capacitor. |
| 3 | EN1 | Active-low enable for OUT1 - drives channel ON when pulled low; high-impedance when floating (default OFF). |
| 4 | EN2 | Active-low enable for OUT2 - independently controls second channel; allows staggered power-up sequencing. |
| 5 | OC2 | Open-drain overcurrent flag for OUT2 - sinks current when fault detected; requires external pullup to VCC or microcontroller I/O. |
| 6 | OUT2 | Switched output for channel 2 - connects to load (e.g., USB port VBUS); limited to 250 mA continuous, 0.3–0.7 A trip. |
| 7 | OUT1 | Switched output for channel 1 - electrically isolated from OUT2; supports independent load monitoring and control. |
| 8 | OC1 | Open-drain overcurrent flag for OUT1 - asserted low during overload or thermal shutdown; debounced internally to avoid noise-induced faults. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Charge Pump | Enables full MOSFET enhancement from 2.7 V input - eliminates need for external gate-drive supply or level shifters in low-voltage systems. |
| Per-Channel Overcurrent Reporting | Dedicated OC1/OC2 pins provide independent fault status - enables precise root-cause identification in multi-port USB hubs without shared fault lines. |
| Controlled Rise/Fall Times | 0.4–1.5 ms rise time (VIN = 2.7–5.5 V) - limits inrush di/dt into heavy capacitive loads (e.g., 10–100 µF USB ports), reducing EMI and input rail droop. |
| Thermal Shutdown with Hysteresis | Shuts off at 135°C junction temp; auto-recovers at 125°C - prevents latch-up during sustained overload while allowing safe cyclic operation until fault removal. |
| Ultra-Low Standby Current | ≤1 μA per channel when disabled - preserves battery life in portable USB hosts and extends runtime in always-on embedded systems. |
Applications
| USB Bus-Powered Hub | Industrial Peripheral Power Control |
|---|---|
Use Scenario: Dual-port USB hub drawing power solely from upstream host VBUS, requiring independent port power enable and overcurrent reporting per USB specification. IC Role / Device Role: Dual-channel high-side switch managing VBUS delivery to two downstream ports with per-port enable and fault signaling. Use Value: Meets USB 2.0 inrush (<44 Ω + 10 µF) and enumeration (<100 mA) requirements via controlled turn-on and accurate current limiting. |
Use Scenario: Programmable I/O module powering multiple sensors or actuators from a shared 3.3 V or 5 V rail, where individual rail isolation and fault containment are required. IC Role / Device Role: Independent power switch for each sensor subsystem, enabling software-controlled power cycling and fault detection. Use Value: Prevents single-point failure propagation; OC1/OC2 signals allow MCU to identify and disable only the faulty subsystem without resetting entire module. |
| Embedded Host Controller Interface | Hot-Swap Board Management |
Use Scenario: Embedded x86 or ARM-based host (e.g., industrial PC) implementing USB host controller with two downstream ports needing compliant power management. IC Role / Device Role: USB VBUS distribution switch interfacing between host controller GPIOs and physical USB connectors. Use Value: Integrates UVLO, current limit, and OC reporting - eliminates discrete protection components and reduces BOM count by ≥5 parts per port. |
Use Scenario: Backplane-based system where daughter cards are inserted/removed while main power remains active, requiring controlled power ramp and fault isolation. IC Role / Device Role: Hot-swap controller for auxiliary 5 V or 3.3 V rails feeding FPGA mezzanine or communication modules. Use Value: 0.6 ms typical rise time and deglitched OC prevent transient-induced resets during card insertion; SOIC-8 footprint simplifies layout near edge connectors. |
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 |
|---|---|---|---|
| TPS2046BD | Same silicon die and electrical specs; differs only in packaging - TPS2046BD is tube-packaged, while TPS2046BDR is tape-and-reel (R suffix). | No functional difference; identical pinout, timing, and thermal behavior - suitable for same PCB design and firmware. | Select TPS2046BD for prototyping or low-volume builds; choose TPS2046BDR for automated SMT assembly and volume production. |
| TPS2056BDR | Active-high enable logic (EN1/EN2 high = ON), otherwise identical architecture, rDS(on), current limit, and package. | Requires inverted enable signal routing or GPIO configuration change - not drop-in compatible without firmware/hardware update. | Choose TPS2056BDR only if system controller natively provides active-high enables and avoids level-shifting logic. |
Compared with TPS2046BD and TPS2056BDR, the TPS2046BDR offers tape-and-reel logistics advantage for manufacturing while retaining active-low enable compatibility with legacy USB hub controllers - making it optimal for cost-sensitive, high-volume USB peripheral designs requiring no enable polarity redesign.
Availability
TPS2046BDR is available at Aetrix Electronics and suitable for USB bus-powered hubs, industrial peripheral power control, embedded host controller interfaces, and hot-swap board management requiring stable component supply and long-term production continuity.
Supply support for TPS2046BDR 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 USB interface and power distribution solutions.
The TPS204xB family was designed specifically for USB-compliant power distribution in host, hub, and peripheral applications - emphasizing inrush control, fault reporting, and low-voltage operation in space-constrained packages.
FAQ
What is the maximum continuous current per channel for the TPS2046BDR?
The TPS2046BDR supports 250 mA continuous output current per channel under recommended operating conditions (TA ≤ 85°C, VI(IN) = 2.7–5.5 V). Its current-limit threshold is specified from 0.3 A (min) to 0.7 A (max), ensuring reliable short-circuit protection across process and temperature variations. This rating applies independently to OUT1 and OUT2.
Does the TPS2046BDR support 3.3 V input operation?
Yes, the TPS2046BDR fully supports 3.3 V input operation. Its operating voltage range is 2.7 V to 5.5 V, and its internal charge pump ensures proper MOSFET gate drive even at 3.3 V - delivering 75 mΩ typical rDS(on) at 2.7 V and maintaining fast, controlled rise/fall times essential for USB inrush compliance.
How does the overcurrent (OC) reporting work on the TPS2046BDR?
The TPS2046BDR provides two independent open-drain, active-low OC outputs: OC1 for OUT1 and OC2 for OUT2. Each asserts low after a 4–15 ms deglitch timeout upon detecting overcurrent or thermal shutdown. The deglitch prevents false triggers from capacitive inrush, and the outputs remain low until the fault condition clears - enabling precise per-channel fault diagnosis in USB hubs.
What is the thermal shutdown behavior of the TPS2046BDR?
The TPS2046BDR activates thermal shutdown at approximately 135°C junction temperature and recovers automatically at ~125°C due to 10°C hysteresis. During sustained overload, it cycles ON/OFF until the fault is removed. This protects the device without requiring external intervention and maintains safe operation in enclosed or high-ambient environments where airflow is limited.
Is the TPS2046BDR pin-compatible with other devices in the TPS204x family?
The TPS2046BDR is pin-compatible with the TPS2046BD (same SOIC-8 footprint and pinout), but not with TPS2045B (single-channel) or TPS2047B (triple-channel), which have different pin counts and assignments. Always verify terminal functions using the "Terminal Functions (TPS2046B)" table in the TI SLVS532C datasheet before PCB layout.
TPS2046BDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 2
- Ratio - Input:Output:
- 1:1
- 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):
- 70mOhm
- Input Type:
- 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
TPS2046BDR FAQ
1.How can I place an order for TPS2046BDR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2046BDR 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 TPS2046BDR reliable?
The price and inventory of TPS2046BDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2046BDR is usually 5 days.
3.What payment methods are accepted for TPS2046BDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2046BDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2046BDR?
TPS2046BDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2046BDR 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 TPS2046BDR?
For technical support, including TPS2046BDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2046BDR requirements.
6.How does Aetrix verify that TPS2046BDR is sourced from the original manufacturer or authorized distributors?
All TPS2046BDR 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 TPS2046BDR meets industry standards.
7.What is the process for return or replacement of TPS2046BDR?
All TPS2046BDR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2046BDR, 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 TPS2046BDR part is unused and in its original packaging.
Return procedure for TPS2046BDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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