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Texas Instruments TPS2043D
- Part No.:
- TPS2043D
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2043D.pdf
- Description:
- IC PWR SWTCH N-CH 1:2/1:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,331
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Product details
Overview
TPS2043D from Texas Instruments is a triple high-side N-channel MOSFET power-distribution switch in a 16-pin SOIC package, delivering 500 mA continuous current per channel with 135 mΩ max RDS(on) at 5 V input, active-low enable logic, and integrated short-circuit/thermal protection for USB and hot-swap applications.
For engineers reviewing the TPS2043D datasheet, TPS2043D pinout, TPS2043D application, or TPS2043D equivalent, this device supports robust load switching in multi-rail power systems where inrush current control, fault isolation, and undervoltage lockout are critical - especially in USB host/hub designs requiring independent channel enable and overcurrent reporting.
Technical Context
The TPS2043D integrates three independent high-side switches, each driven by an internal charge pump enabling operation down to 2.7 V input while maintaining gate overdrive. Its current-limit circuitry uses a sense FET (not external resistor) to detect overload and enter constant-current mode at ~0.9 A typical short-circuit threshold.
Thermal protection features dual trip points (~140°C and ~160°C) for per-channel fault isolation and automatic recovery with hysteresis. The device implements undervoltage lockout (~2 V turnoff), 2.5-ms typical rise time, and open-drain OCx outputs that assert low during overcurrent or overtemperature events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channel count | Three independent high-side power switches with separate EN and OC pins. |
| Continuous current per channel | 500 mA - supports sustained loads like USB peripheral ports without derating at 25°C ambient. |
| RDS(on) max | 135 mΩ at 5 V input, 125°C - limits conduction loss to ≤338 mW per channel at full load. |
| Enable logic polarity | Active-low (EN1–EN3) - compatible with standard microcontroller GPIOs asserting low to enable power delivery. |
| OC output type | Open-drain, active-low - allows wired-OR connection to single interrupt line for system-level fault monitoring. |
| Operating input voltage | 2.7 V to 5.5 V - enables use across 3.3 V and 5 V systems, including USB-compliant 4.75–5.25 V bus ranges. |
| Standby supply current | 20 µA max - ensures minimal quiescent draw when all channels disabled, critical for battery-backed systems. |
Pinout & Package
TPS2043D is housed in a 16-pin SOIC (D) package with 1.27 mm pitch, surface-mount footprint, and thermal resistance θJA = 172°C/W. Pin 1 is GND1; pins 8, 9, 10 are NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND1, GND2 (Pins 1, 5) | Dual ground returns | Separate ground paths for IN1/OUT1/OUT2 and IN2/OUT3 domains reduce crosstalk and improve thermal distribution. |
| IN1, IN2 (Pins 2, 6) | Power inputs | Independent input rails - IN1 supplies OUT1/OUT2; IN2 supplies OUT3 - enables dual-input power routing. |
| EN1–EN3 (Pins 3, 4, 7) | Enable inputs | Active-low logic control per channel - direct interface to MCU I/O without level-shifting. |
| OUT1–OUT3 (Pins 15, 14, 11) | Switched power outputs | High-side outputs capable of driving capacitive loads up to 470 µF with controlled 2.5-ms rise time. |
| OC1–OC3 (Pins 16, 13, 12) | Overcurrent status outputs | Open-drain signals pulled low during fault - support shared interrupt bus with external pull-up resistors. |
Key Features
| Feature | Design Value |
|---|---|
| Per-channel thermal fault isolation | Dual-threshold thermal shutdown (~140°C per switch, ~160°C global) prevents single fault from disabling all outputs. |
| Charge-pump gate drive | Enables full enhancement of N-channel MOSFETs from 2.7 V input - eliminates need for external boost circuitry. |
| Controlled switching slew rate | 2.5-ms typical rise time minimizes EMI and inrush current spikes during hot-plug events. |
| Integrated undervoltage lockout | Turns off all switches below ~2 V input - ensures clean power-up sequencing and prevents brownout operation. |
| Sense-FET current limiting | Accurate, resistorless current sensing avoids power loss and PCB area penalty of shunt resistors. |
Applications
| USB Host Hub Power Management | Industrial Multi-Rail Load Switching |
|---|---|
|
Use Scenario: Desktop PC or monitor with three downstream USB ports requiring independent power control and overcurrent reporting. IC Role / Device Role / Timing Role: High-side power switch per port, with ENx controlling port enable/disable and OCx signaling faults to USB controller. Use Value: Enables compliance with USB specification current-limit reporting and hot-plug safety, using only one IC instead of three discrete switches. |
Use Scenario: Programmable logic controller (PLC) backplane distributing 5 V to multiple I/O modules with individual fault isolation. IC Role / Device Role / Timing Role: Triple-channel power distributor with per-module enable and fault flag, supporting modular hot-swap capability. Use Value: Prevents single module short from collapsing entire 5 V rail; OCx outputs feed PLC diagnostics without additional sensing circuitry. |
| Embedded System Power Sequencing | Point-of-Load Protection in Networking Equipment |
|
Use Scenario: FPGA-based edge device powering camera, sensor, and radio subsystems from shared 3.3 V supply with staggered startup. IC Role / Device Role / Timing Role: Sequenced high-side switch enabling subsystems via timed GPIO asserts on EN1–EN3. Use Value: Eliminates need for discrete MOSFETs, gate drivers, and current-sense amps - reduces BOM count and layout complexity. |
Use Scenario: 1U network switch with eight SFP+ cages, each requiring isolated 3.3 V power with short-circuit protection. IC Role / Device Role / Timing Role: One TPS2043D per two cages, providing dual-channel protected power with OC feedback to management MCU. Use Value: Delivers 500 mA per cage with <135 mΩ loss, meeting IEEE 802.3af PoE auxiliary power requirements under thermal constraints. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple high-side power switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2053D | Identical pinout and specs, but active-high enable logic (ENx high = ON) versus TPS2043D's active-low. | Requires inverted control signal timing; better suited for systems with pull-up default-enable architecture. | Select TPS2053D if MCU GPIOs default high and require minimal firmware change for enable assertion. |
| TPS22965DCKR | Single-channel, 2-A rated, 29-mΩ RDS(on), 6-pin SC70 - not pin-compatible; lacks OC output and thermal trip independence. | Requires three units + external logic for triple-channel function; no per-channel OC reporting. | Choose only for space-constrained single-load applications where TPS2043D's integration is unnecessary. |
Compared with TPS2053D, TPS2043D offers identical protection and performance but simplifies control in active-low systems; compared with TPS22965DCKR, it delivers true triple-channel integration with fault visibility and thermal autonomy - eliminating board-level complexity and component count.
Availability
TPS2043D is available at Aetrix Electronics and suitable for USB host hubs, industrial PLC backplanes, and embedded power-sequencing applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for TPS2043D 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 TPS2043D belongs to TI's power-distribution switch product line, designed specifically for USB-compliant hot-swap systems and multi-rail embedded platforms requiring robust fault protection and minimal external components.
FAQ
What is the enable logic polarity of the TPS2043D?
The TPS2043D uses active-low enable inputs (EN1, EN2, EN3). A logic low on any EN pin turns on its corresponding power switch; a logic high disables it and reduces supply current to ≤20 µA. This matches common microcontroller reset-active-low or enable-active-low configurations without requiring inverters.
Does the TPS2043D support 3.3-V input operation?
Yes, the TPS2043D operates from 2.7 V to 5.5 V input, including 3.3 V nominal rails. At 3.3 V and 25°C, its RDS(on) is typically 105 mΩ - still enabling 500 mA continuous current with ≤263 mW conduction loss per channel, verified across temperature and load conditions in the datasheet.
How does the TPS2043D handle short-circuit faults?
When a short occurs, the TPS2043D immediately enters constant-current mode at ~0.9 A (typical), holding output current steady while reducing output voltage. If the fault persists, junction temperature rises and triggers thermal shutdown at ~140°C per affected channel - isolating only the faulty switch while others remain operational.
Can the TPS2043D be used in USB 2.0 hub designs?
Yes - the TPS2043D is explicitly referenced in TI's USB application notes for host and self-powered hubs. Its 500 mA per channel, OCx fault reporting, controlled rise time, and 2.7–5.5 V range meet USB 2.0 power-delivery and hot-plug requirements, and it has been validated in reference designs such as Figure 31 of SLVS191.
What is the thermal resistance and maximum junction temperature of the TPS2043D?
The TPS2043D in SOIC (D) package has θJA = 172°C/W. Its absolute maximum junction temperature is 125°C, and operating virtual junction temperature range is –40°C to 125°C. Thermal shutdown activates at ~140°C per channel, with hysteresis allowing automatic recovery after ~20°C cooldown.
TPS2043D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Switch Type:
- General Purpose
- Number of Outputs:
- 3
- 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):
- 500mA
- Rds On (Typ):
- 80mOhm
- 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:
- 16-SOIC
TPS2043D FAQ
1.How can I place an order for TPS2043D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2043D 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 TPS2043D reliable?
The price and inventory of TPS2043D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2043D is usually 5 days.
3.What payment methods are accepted for TPS2043D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2043D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2043D?
TPS2043D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2043D 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 TPS2043D?
For technical support, including TPS2043D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2043D requirements.
6.How does Aetrix verify that TPS2043D is sourced from the original manufacturer or authorized distributors?
All TPS2043D 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 TPS2043D meets industry standards.
7.What is the process for return or replacement of TPS2043D?
All TPS2043D units undergo pre-shipment inspection (PSI). If there is an issue with TPS2043D, 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 TPS2043D part is unused and in its original packaging.
Return procedure for TPS2043D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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