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Texas Instruments TPS2046AD
- Part No.:
- TPS2046AD
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2046AD.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:2 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,886
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Product details
Overview
TPS2046AD from Texas Instruments is a dual-channel, high-side N-channel MOSFET power-distribution switch with independent enable control and overcurrent protection. It features 80-mΩ on-resistance per channel, 250 mA continuous current per switch, 2.7-V to 5.5-V input operation, and active-high enable inputs (per TPS204xA series). It is used in USB peripheral power management, portable electronics, and multi-rail embedded systems requiring fault-isolated load switching.
For engineers reviewing the TPS2046AD datasheet, TPS2046AD pinout, TPS2046AD application, or TPS2046AD equivalent, key selection considerations include per-channel thermal/short-circuit protection, open-drain OCx outputs for system-level fault monitoring, rise/fall time control (2.5 ms typical), undervoltage lockout (~2 V), and low standby current (≤10 µA).
Technical Context
The TPS2046AD integrates two independent high-side power switches, each driven by an internal charge pump enabling full enhancement of the N-channel MOSFETs down to 2.7 V input. Each channel includes dedicated current-sense FETs, thermal sensing circuitry, and open-drain OC outputs that assert low during overcurrent or junction temperature >140°C.
Enable logic is CMOS/TTL-compatible and active-high (EN1/EN2); disabling either channel cuts bias to its associated driver and charge pump, reducing supply current to ≤10 µA. The device implements dual-threshold thermal protection-individual channel shutdown without affecting the other-and automatic recovery after ~20°C hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Number of channels | Dual independent high-side switches with separate EN1/EN2 and OC1/OC2 signals |
| rDS(on) max | 135 mΩ at 5 V IN, 125°C - limits voltage drop and self-heating under 250 mA load |
| Continuous current per channel | 250 mA - supports USB-compliant downstream ports and low-power peripherals |
| Input voltage range | 2.7 V to 5.5 V - compatible with Li-ion, 3.3 V, and 5 V system rails |
| Rise time (typ) | 2.5 ms at 5.5 V IN - controls inrush current into capacitive loads (e.g., 100 µF) |
| Standby supply current | ≤10 µA (both channels disabled) - enables ultra-low-power system sleep states |
| Overcurrent response | Constant-current limiting (0.5 A short-circuit trip) followed by thermal shutdown at ~140°C |
Pinout & Package
TPS2046AD is housed in an 8-pin SOIC (D) package with exposed pad (not thermally enhanced per datasheet). Pin functions are validated per TI SLVS251C Rev. Jan 2008.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND | Power ground reference for both channels and internal circuitry |
| 2 | IN | Common input voltage rail feeding both high-side switches |
| 3 | EN1 | Active-high enable for channel 1 (IN → OUT1); logic high = ON |
| 4 | EN2 | Active-high enable for channel 2 (IN → OUT2); logic high = ON |
| 5 | OC2 | Open-drain overcurrent output for channel 2; pulled low during fault |
| 6 | OUT2 | Channel 2 switched output; connects to load when EN2 = high |
| 7 | OUT1 | Channel 1 switched output; connects to load when EN1 = high |
| 8 | OC1 | Open-drain overcurrent output for channel 1; pulled low during fault |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-channel protection | Each switch has dedicated current sense, OC output, and thermal shutdown - faults on one channel do not disable the other |
| Controlled switching transients | Internal driver limits rise/fall times to ~2.5 ms, minimizing EMI and inrush surges into large capacitive loads |
| Low-quiescent power state | ≤10 µA total supply current when both EN inputs are low - critical for battery-backed systems |
| Undervoltage lockout (UVLO) | Disables output when IN falls below ~2 V - prevents erratic behavior during brownout or startup |
| Logic-level compatible enables | EN1/EN2 accept 0–5.5 V inputs and interface directly with 3.3 V or 5 V microcontrollers without level shifters |
Applications
| USB Peripheral Power Switching | Multi-Rail Embedded System Protection |
|---|---|
Use Scenario: Isolating power to USB-connected peripherals (keyboard, mouse, hub) in laptops or docking stations. IC Role / Device Role / Timing Role: Dual high-side switch providing independent, current-limited 5 V power rails with fault reporting via OC1/OC2. Use Value: Prevents bus-wide failure from single-peripheral short; OC outputs feed MCU GPIOs for real-time fault logging and graceful recovery. |
Use Scenario: Power sequencing and protection for FPGA I/O banks or sensor subsystems with distinct voltage domains. IC Role / Device Role / Timing Role: Dual-channel load switch enabling/disabling 3.3 V and 2.5 V rails under firmware control with independent fault detection. Use Value: Enables safe hot-swap of subassemblies; thermal independence ensures one rail's overload doesn't disrupt another's operation. |
| Portable Medical Device Power Management | Industrial Control Module Load Isolation |
Use Scenario: Controlling power to disposable sensor modules or wireless telemetry units in handheld diagnostics equipment. IC Role / Device Role / Timing Role: High-side switch delivering regulated 3.3 V with precise current limiting and fast OC assertion (<100 µs) for safety-critical fault response. Use Value: Meets IEC 62304 fault tolerance requirements; constant-current mode avoids destructive latch-up during sensor cable shorts. |
Use Scenario: Isolating auxiliary 5 V supplies for fieldbus interfaces (RS-485, CAN transceivers) in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-channel switch with UVLO and thermal protection ensuring robust operation in wide-temperature industrial environments (0°C to 85°C). Use Value: Eliminates need for discrete fuses and relays; OC outputs integrate with PLC watchdog timers for automated fault reset. |
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 |
|---|---|---|---|
| TPS2056AD | Same pinout and package, but active-high enable logic aligned with TPS205xA series - identical electrical specs and protection features | No functional difference; designed for same use cases - differs only in enable polarity convention across TI's product families | Select TPS2056AD if system logic uses active-high enables consistently across multiple TI power switches |
| AP2152AMPG-13 | Single-channel 2.7–5.5 V switch (Diodes Inc.), 115 mΩ rDS(on), 600 mA limit, no OC output - requires external fault detection | Lacks dual-channel integration and per-channel OC reporting; suitable only where channel count or fault visibility is not required | Choose only for cost-sensitive, single-load applications where OC feedback and dual independence are unnecessary |
Compared with TPS2056AD, the TPS2046AD offers identical performance and pin compatibility but uses active-high enable logic consistent with the TPS204xA family; versus AP2152AMPG-13, it provides integrated dual-channel control, independent OC signaling, and lower rDS(on), making it superior for fault-aware multi-load systems.
Availability
TPS2046AD is available at Aetrix Electronics and suitable for USB peripheral power distribution, portable medical device subsystems, and industrial control module load isolation requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS2046AD 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 high-reliability power-switching solutions.
The TPS204xA family was designed specifically for USB-compliant and general-purpose power-distribution applications requiring robust overcurrent and thermal protection in compact SOIC packages.
FAQ
What is the enable logic polarity for TPS2046AD?
The TPS2046AD uses active-high enable inputs: EN1 and EN2 must be driven high (≥2 V) to turn on their respective channels. This matches the TPS204xA series designation and differs from the TPS205xA series, which uses active-low enables. The datasheet confirms EN1/EN2 function as logic-high enables for IN→OUT1 and IN→OUT2 paths.
Does TPS2046AD support independent input rails for each channel?
No. The TPS2046AD has a single IN pin (Pin 2) supplying both high-side switches. It does not support dual-input operation - both channels share the same input voltage source. For independent input rails, TI's TPS2047A/TPS2048A (triple/quad with GNDA/GNDB and IN1/IN2) would be required instead.
What is the maximum continuous current per channel for TPS2046AD?
The TPS2046AD is rated for 250 mA continuous output current per channel under recommended operating conditions (TA ≤ 85°C, VI(IN) = 2.7–5.5 V). This rating is validated across temperature and accounts for thermal derating - the D-8 package delivers 377 mW at 85°C ambient.
How does the overcurrent (OC) output behave during a fault?
The OC1 and OC2 pins are open-drain outputs that pull low during overcurrent or thermal events. They remain asserted (low) until the fault condition is removed and the device recovers - no external pull-up is required for basic fault detection, though a 10-kΩ pull-up to system VCC is typical for clean logic-level signaling to a microcontroller.
Can TPS2046AD be used with 3.3 V logic control signals?
Yes. The EN1 and EN2 inputs are CMOS- and TTL-compatible, with VIH(min) = 2.0 V at 2.7–4.5 V supply and 0.8 × VI(IN) at higher voltages. A 3.3 V GPIO from an MCU meets this requirement directly, requiring no level-shifting circuitry for enable control.
TPS2046AD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Bulk
- 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):
- 80mOhm
- Input Type:
- Inverting
- Features:
- -
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS2046AD FAQ
1.How can I place an order for TPS2046AD through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2046AD 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 TPS2046AD reliable?
The price and inventory of TPS2046AD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2046AD is usually 5 days.
3.What payment methods are accepted for TPS2046AD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2046AD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2046AD?
TPS2046AD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2046AD 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 TPS2046AD?
For technical support, including TPS2046AD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2046AD requirements.
6.How does Aetrix verify that TPS2046AD is sourced from the original manufacturer or authorized distributors?
All TPS2046AD 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 TPS2046AD meets industry standards.
7.What is the process for return or replacement of TPS2046AD?
All TPS2046AD units undergo pre-shipment inspection (PSI). If there is an issue with TPS2046AD, 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 TPS2046AD part is unused and in its original packaging.
Return procedure for TPS2046AD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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