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Texas Instruments TPS2046BDG4
- Part No.:
- TPS2046BDG4
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2046BDG4.pdf
- Description:
- IC PWR DIST SWITCH DUAL 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:525
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Product details
Overview
TPS2046BDG4 from Texas Instruments is a dual-channel, current-limited power-distribution switch with 70-mΩ high-side N-channel MOSFETs, active-low enable inputs, and independent overcurrent (OC1/OC2) open-drain fault reporting. It operates from 2.7 V to 5.5 V, delivers up to 250 mA per channel continuously, and integrates thermal shutdown, undervoltage lockout, and deglitched fault detection - designed for USB bus-powered hub and peripheral power management.
For engineers reviewing the TPS2046BDG4 datasheet, TPS2046BDG4 pinout, TPS2046BDG4 application, or TPS2046BDG4 equivalent, key selection criteria include per-channel enable control, 0.5 A typical current limit accuracy, SOIC-8 package compatibility, and compliance with USB inrush-current and hot-plug requirements.
Technical Context
The TPS2046BDG4 implements two independent high-side switches driven by internal charge pumps enabling operation down to 2.7 V without external components. Each channel features dedicated current-sense circuitry that triggers constant-current limiting upon exceeding 0.3–0.7 A, followed by thermal shutdown at ~135°C junction temperature with 10°C hysteresis.
Its logic-level EN1/EN2 inputs are active low, and OC1/OC2 outputs are open-drain, active-low signals debounced with a 4–15 ms deglitch window to suppress false fault reporting during capacitive load turn-on. The device remains disabled until input voltage exceeds 2.0 V (UVLO rising threshold), ensuring controlled startup in hot-swap systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 5.5 V - supports USB 5 V nominal and 3.3 V system rails with margin |
| Continuous Output Current | 250 mA per channel - limits sustained load current to prevent trace overheating |
| Current Limit Threshold | 0.3 A min / 0.7 A max - ensures robust short-circuit protection across temperature and process variation |
| rDS(on) | 70 mΩ typical at 5 V - minimizes conduction loss and self-heating under full load |
| Rise Time (tr) | 0.6 ms typical at 5.5 V - controls inrush dI/dt to meet USB 10 µF + 44 Ω inrush requirement |
| Supply Current (disabled) | ≤1 µA at TJ = 25°C - enables ultra-low-power standby in battery-backed or always-on systems |
| Operating Temperature | –40°C to 85°C ambient - qualified for industrial and consumer USB host/peripheral environments |
Pinout & Package
TPS2046BDG4 is housed in an 8-pin SOIC (D-8) package with exposed pad for thermal enhancement. Pin numbering follows standard D-8 outline (pin 1 = GND, pin 2 = IN, pin 3 = EN1, pin 4 = EN2, pin 5 = OC2, pin 6 = OUT2, pin 7 = OUT1, pin 8 = OC1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Common return path for both channels and internal circuitry; must be low-impedance connection |
| IN (Pin 2) | Input power supply | Single shared input rail for both output channels; accepts 2.7–5.5 V |
| EN1 (Pin 3) | Channel 1 enable input | Active-low logic control - drives OUT1 on low, disables on high or floating (internal pull-up) |
| EN2 (Pin 4) | Channel 2 enable input | Active-low logic control - drives OUT2 on low, disables on high or floating (internal pull-up) |
| OC2 (Pin 5) | Channel 2 fault indicator | Open-drain, active-low output asserted during overcurrent or thermal shutdown; requires external pull-up |
| OUT2 (Pin 6) | Channel 2 switched output | High-side power output for second load; current-limited and thermally protected |
| OUT1 (Pin 7) | Channel 1 switched output | High-side power output for first load; independent switching and fault reporting from OUT2 |
| OC1 (Pin 8) | Channel 1 fault indicator | Open-drain, active-low output asserted during overcurrent or thermal shutdown; requires external pull-up |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent high-side switches | Enables discrete power control of two downstream USB ports or peripherals without cross-talk |
| Integrated charge pump | Eliminates need for external boost capacitor; sustains full rDS(on) performance down to 2.7 V input |
| De-glitched OC outputs | 4–15 ms fault debounce prevents false trips during hot-plug transients or large-capacitance load turn-on |
| Thermal shutdown with hysteresis | Auto-recovery at ~125°C after cooling; prevents latch-up during sustained overload while protecting silicon |
| Undervoltage lockout (UVLO) | Disables outputs below ~2.0 V input; ensures clean power-up sequencing and prevents brownout instability |
Applications
| USB Bus-Powered Hub Port | Industrial Control I/O Module |
|---|---|
Use Scenario: Distributing 5 V power to two downstream USB devices from a single upstream port, meeting USB rev 1.1 inrush limits (≤10 µF + 44 Ω). IC Role / Device Role / Timing Role: Dual-channel high-side switch providing independent enable control, current limiting, and fault reporting per port. Use Value: Eliminates need for discrete FETs, sense resistors, and comparator circuits - reduces BOM count and layout area by >40% versus discrete solution. | Use Scenario: Powering isolated sensor interfaces and actuator drivers in programmable logic controller (PLC) backplane slots with fault isolation. IC Role / Device Role / Timing Role: Protected power rail switch with thermal and overcurrent response <10 ms, supporting hot-swap maintenance. Use Value: Prevents system-wide shutdown during single-sensor short; OC1/OC2 signals feed PLC diagnostics without software polling. |
| Embedded Peripheral Power Gate | Medical Diagnostic Equipment Subsystem |
Use Scenario: Enabling/disabling 3.3 V power to Wi-Fi and Bluetooth modules in portable diagnostic handhelds during sleep/wake cycles. IC Role / Device Role / Timing Role: Low-quiescent, dual-channel power gate with <1 µA disable current and controlled 0.6 ms rise time. Use Value: Extends battery life by cutting module leakage paths; soft-start prevents EMI-induced noise in sensitive analog front-ends. | Use Scenario: Isolating auxiliary 5 V rails for display backlight and touch controller in FDA-cleared patient monitor. IC Role / Device Role / Timing Role: Safety-isolated power switch with independent fault reporting per subsystem and UVLO for clean reset behavior. Use Value: Meets IEC 60601-1 creepage/clearance requirements via SOIC-8 spacing; OC signals trigger audible alarm before thermal damage occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel power-switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2046BDR | Same die, tape-and-reel packaging (R suffix); identical electrical specs and pinout | No functional difference - intended for automated SMT assembly vs. tube-packaged DG4 | Select TPS2046BDR for volume production; TPS2046BDG4 for prototyping or low-volume hand-soldering |
| TPS2056BD | Active-high enable inputs (EN1/EN2 high = ON), same SOIC-8 package and current rating | Requires inverted logic drive; not drop-in compatible without firmware/hardware change | Choose only if system logic naturally provides active-high enables; verify OC polarity timing matches host controller |
Compared with TPS2046BDR, TPS2046BDG4 offers identical performance in tube packaging for flexibility in small-batch builds; versus TPS2056BD, it avoids logic inversion but requires active-low control - critical for USB enumeration timing where enable assertion must align with VBUS presence.
Availability
TPS2046BDG4 is available at Aetrix Electronics and suitable for USB peripheral design, industrial I/O modules, and medical subsystem power gating requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for TPS2046BDG4 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 engineered specifically for USB-compliant hot-plug power distribution, delivering integrated current limiting, fault reporting, and soft-start in compact packages - targeting host controllers, hubs, and bus-powered peripherals.
FAQ
What is the maximum continuous current per channel for TPS2046BDG4?
The TPS2046BDG4 supports 250 mA continuous output current per channel under recommended operating conditions (VI(IN) = 2.7 V to 5.5 V, TA = –40°C to 85°C). Its current-limit threshold is specified from 0.3 A minimum to 0.7 A maximum, with 0.5 A typical - ensuring reliable short-circuit protection without nuisance tripping during transient loads. This rating applies independently to each of the two channels in the TPS2046BDG4.
Does TPS2046BDG4 require external components for charge pump operation?
No, the TPS2046BDG4 integrates a fully self-contained charge pump that requires no external capacitors or inductors. This internal circuit enables the high-side N-channel MOSFETs to achieve full enhancement and maintain low rDS(on) (70 mΩ typical) even when input voltage drops to 2.7 V. The charge pump is optimized for SOIC-8 thermal performance and eliminates board space and BOM cost associated with discrete boost solutions - a key feature confirmed in the TPS2046BDG4 datasheet Figure 1 and Electrical Characteristics table.
How does the overcurrent (OC) reporting work on TPS2046BDG4?
The TPS2046BDG4 provides two independent open-drain, active-low OC outputs (OC1 and OC2), each tied to one channel. When overcurrent or thermal shutdown occurs, the corresponding OC pin pulls low after a 4–15 ms deglitch timeout - preventing false triggers from inrush spikes. The OC signal remains asserted until the fault condition clears and the device recovers. Each OC output requires an external pull-up resistor (typically 10 kΩ to VCC) and interfaces directly with microcontroller GPIOs or interrupt lines. This behavior is explicitly defined in the TPS2046BDG4 Terminal Functions table and APPLICATION INFORMATION section.
Is TPS2046BDG4 compatible with USB 2.0 bus-powered device requirements?
Yes, the TPS2046BDG4 meets core USB 2.0 bus-powered device requirements: it limits inrush current via controlled 0.6 ms rise time (meeting ≤10 µF + 44 Ω spec), provides per-port current limiting (0.5 A typical), reports faults via OC pins for host controller monitoring, and supports hot-plug operation with UVLO and thermal protection. Its dual-channel architecture maps directly to USB hub downstream port power management, as validated in TI's SLVS532C datasheet Figures 25 and 26 - confirming TPS2046BDG4 suitability for USB 2.0-compliant designs.
What is the thermal shutdown behavior of TPS2046BDG4?
The TPS2046BDG4 activates thermal shutdown when junction temperature reaches approximately 135°C under sustained overload or short-circuit conditions. The switch turns off completely, and recovery begins automatically once the die cools to ~125°C - a 10°C hysteresis prevents oscillation. During shutdown, the corresponding OC pin asserts low. This behavior is intrinsic to the TPS2046BDG4 silicon and documented in the Electrical Characteristics table (Thermal Shutdown section) and APPLICATION INFORMATION subsection "THERMAL PROTECTION". No external intervention is required for safe auto-recovery.
TPS2046BDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- 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
TPS2046BDG4 FAQ
1.How can I place an order for TPS2046BDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2046BDG4 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 TPS2046BDG4 reliable?
The price and inventory of TPS2046BDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2046BDG4 is usually 5 days.
3.What payment methods are accepted for TPS2046BDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2046BDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2046BDG4?
TPS2046BDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2046BDG4 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 TPS2046BDG4?
For technical support, including TPS2046BDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2046BDG4 requirements.
6.How does Aetrix verify that TPS2046BDG4 is sourced from the original manufacturer or authorized distributors?
All TPS2046BDG4 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 TPS2046BDG4 meets industry standards.
7.What is the process for return or replacement of TPS2046BDG4?
All TPS2046BDG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS2046BDG4, 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 TPS2046BDG4 part is unused and in its original packaging.
Return procedure for TPS2046BDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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