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Texas Instruments TPS2043ADR
- Part No.:
- TPS2043ADR
- Manufacturer:
- Texas Instruments
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2043ADR.pdf
- Description:
- IC PWR SWTCH N-CH 1:2/1:1 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,991
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Product details
Overview
TPS2043ADR from Texas Instruments is a triple-channel, current-limited, high-side N-channel MOSFET power-distribution switch with independent enable control per channel and integrated thermal/short-circuit protection. It delivers 500 mA continuous current per channel, features 80 mΩ on-resistance at 5 V, operates from 2.7 V to 5.5 V, and provides active-low overcurrent (OC) logic outputs for fault monitoring - used in USB-powered peripheral hubs, industrial I/O modules, and embedded system power rail management.
For engineers reviewing the TPS2043ADR datasheet, TPS2043ADR pinout, TPS2043ADR application, or TPS2043ADR equivalent, key selection considerations include its triple-channel architecture with dual-input voltage domains (IN1/GNDA and IN2/GNDB), 20 µA maximum standby supply current, 2.5-ms typical rise time, undervoltage lockout (~2 V), and SOIC-16 D-package compatibility with tape-and-reel delivery (R suffix).
Technical Context
The TPS2043ADR integrates three independent high-side power switches - two driven from IN1/GNDA and one from IN2/GNDB - each with dedicated CMOS/TTL-compatible enable inputs (EN1–EN3, active-low for TPS204x series) and open-drain OC outputs. Its internal charge pump enables full gate drive down to 2.7 V input, eliminating external components while controlling rise/fall times to limit inrush current and EMI.
Current limiting is implemented via a sense FET (not shunt resistor), enabling constant-current mode at ~0.9 A short-circuit threshold. Thermal protection uses a dual-threshold trip (~140°C activation, ~120°C recovery hysteresis) that isolates only the faulted channel, preserving operation of unaffected switches - critical for multi-rail systems requiring fault containment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Number of channels | Triple independent high-side switches: two on IN1/GNDA, one on IN2/GNDB |
| Continuous current per channel | 500 mA - supports standard USB downstream port loads and industrial sensor rails |
| On-resistance (rDS(on)) | 80 mΩ max at VI(IN) = 5 V, TJ = 25°C - limits voltage drop to ≤400 mV at 500 mA |
| Input voltage range | 2.7 V to 5.5 V - compatible with 3.3 V and 5 V logic/system rails |
| Enable logic polarity | Active-low (TPS204x series) - EN1/EN2/EN3 low enables respective switch |
| Standby supply current | 20 µA max - enables ultra-low-power sleep states in battery-backed systems |
| Rise time (tr) | 2.5 ms typical (VI(IN) = 5.5 V, CL = 1 µF) - controls inrush, reduces stress on upstream converters |
Pinout & Package
TPS2043ADR is housed in a 16-pin SOIC (D) package with exposed pad (not thermally enhanced per datasheet), rated for 0°C to 85°C ambient operation. Pin numbering follows standard SOIC top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GNDA (Pin 1) | Ground reference | Return path for IN1, OUT1, OUT2, and associated circuitry - must be routed separately from GNDB |
| IN1 (Pin 2) | Power input | Main input rail for first two switches (OUT1/OUT2); requires local 0.01–0.1 µF ceramic bypass |
| EN1 (Pin 3) | Enable input | Active-low control for IN1→OUT1 switch; TTL/CMOS compatible (VIH ≥2 V, VIL ≤0.4 V) |
| EN2 (Pin 4) | Enable input | Active-low control for IN1→OUT2 switch; independent timing and fault response |
| GNDB (Pin 5) | Ground reference | Return path for IN2 and OUT3 - electrically isolated from GNDA to support dual-input domain operation |
| IN2 (Pin 6) | Power input | Second input rail for third switch (OUT3); enables flexible dual-supply partitioning |
| EN3 (Pin 7) | Enable input | Active-low control for IN2→OUT3 switch; fully independent of EN1/EN2 timing and faults |
| NC (Pins 8, 9, 10) | No connection | Unbonded pins - must remain unconnected and unstubbed on PCB |
| OC1 (Pin 16) | Fault output | Open-drain active-low signal indicating overcurrent or overtemperature on OUT1 |
| OUT1 (Pin 15) | Switched output | High-side switched output from IN1; supports up to 500 mA continuous load |
| OUT2 (Pin 14) | Switched output | High-side switched output from IN1; shares IN1/GNDA domain with OUT1 |
| OC2 (Pin 13) | Fault output | Open-drain active-low signal indicating overcurrent or overtemperature on OUT2 |
| OC3 (Pin 12) | Fault output | Open-drain active-low signal indicating overcurrent or overtemperature on OUT3 |
| OUT3 (Pin 11) | Switched output | High-side switched output from IN2; electrically isolated from IN1 domain |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-input domain architecture | Separate IN1/GNDA and IN2/GNDB domains allow two independent power rails (e.g., 3.3 V + 5 V) to feed three loads without cross-talk or shared fault propagation |
| Channel-isolated thermal shutdown | Dual-threshold thermal sensing (~140°C trip, ~120°C recovery) disables only the overheating switch, maintaining uptime for other channels |
| Integrated charge pump | Enables full gate drive from 2.7 V input - no external capacitors required and ensures reliable switching across entire operating voltage range |
| Active-low overcurrent outputs (OC1–OC3) | Open-drain outputs sink ≥10 mA - directly interface with microcontroller GPIOs or pull-up logic for real-time fault logging without level-shifting |
| Undervoltage lockout (UVLO) | Disables all switches when VI(IN) falls below ~2 V - prevents erratic behavior during brownout or startup sequencing |
Applications
| USB Peripheral Hub Power Management | Industrial Digital I/O Module |
|---|---|
Use Scenario: A compact USB 2.0 hub board supplies regulated 5 V to three downstream ports, each requiring individual overcurrent protection and hot-plug detection. IC Role / Device Role / Timing Role: TPS2043ADR acts as triple-channel power switch - OUT1/OUT2 power two ports from main 5 V rail (IN1), OUT3 powers third port from auxiliary 5 V source (IN2), with OC1–OC3 feeding MCU interrupt lines. Use Value: Enables per-port current limiting (500 mA), automatic fault isolation, and coordinated reset via EN1–EN3 - eliminating need for discrete fuses or multiple single-channel switches. | Use Scenario: A programmable logic controller (PLC) digital output module drives three 24 V DC solenoid loads, each requiring independent short-circuit protection and status feedback. IC Role / Device Role / Timing Role: TPS2043ADR serves as protected high-side driver - IN1 powers two 24 V loads (via external DC-DC), IN2 powers third; OC signals report faults to safety controller. Use Value: Provides fast current limiting (<100 µs response), thermal fault containment, and 20 µA standby draw - meeting IEC 61000-4-5 surge immunity and low-power standby requirements. |
| Embedded System Multi-Rail Sequencing | Medical Sensor Interface Board |
Use Scenario: A portable diagnostic device sequences power to three subsystems: display backlight (5 V), analog front-end (3.3 V), and wireless transceiver (3.3 V), with strict fault containment. IC Role / Device Role / Timing Role: TPS2043ADR implements rail control - IN1 = 5 V (OUT1), IN1 = 3.3 V (OUT2), IN2 = 3.3 V (OUT3); EN1–EN3 timed by MCU for controlled startup/shutdown. Use Value: Guarantees independent enable/disable timing, eliminates cross-rail fault propagation, and maintains <100 mV dropout at full load - ensuring stable bias for sensitive analog circuits. | Use Scenario: A patient-worn biosensor node powers ECG amplifier, temperature sensor, and Bluetooth LE radio from separate regulated rails, requiring low-noise, low-leakage switching. IC Role / Device Role / Timing Role: TPS2043ADR delivers clean, sequenced power - OUT1 (ECG), OUT2 (temp), OUT3 (BLE); OC outputs trigger alert on leakage or short. Use Value: Achieves 100 µA max output leakage and 20 µA standby - extending battery life; sense-FET current limiting avoids resistive heating near biocompatible components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-side power-switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2043AD | Same silicon, SOIC-16 package without tape-and-reel (R suffix omitted); identical electrical specs and pinout | No difference in functional use; differs only in packaging format (bulk vs. reel) | Select TPS2043AD for prototyping or low-volume builds where reel delivery is unnecessary |
| TPS2053ADR | Pin-compatible triple-channel switch with active-high enable inputs (EN1–EN3 high = on); otherwise identical rDS(on), current rating, and protection features | Requires inverted enable logic in MCU firmware or external inverters; same fault reporting and dual-input capability | Choose TPS2053ADR when system-level logic design favors active-high control for consistency across multiple TI power switches |
Compared with TPS2043ADR, TPS2043AD offers identical performance in bulk packaging, while TPS2053ADR preserves pinout and protection but shifts enable polarity - both alternatives maintain the dual-input domain and channel-isolated thermal response critical for robust multi-rail designs.
Availability
TPS2043ADR is available at Aetrix Electronics and suitable for USB peripheral hubs, industrial I/O modules, and embedded multi-rail power sequencing requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS2043ADR 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 technologies, with decades of expertise in high-reliability power distribution ICs.
The TPS204x family was designed specifically for USB-compliant and industrial power rail management - delivering integrated current limiting, thermal protection, and multi-channel independence in compact SOIC packages.
FAQ
What is the maximum continuous current per channel for the TPS2043ADR?
The TPS2043ADR supports 500 mA continuous current per channel under recommended operating conditions (TA ≤ 85°C, VI(IN) = 2.7 V to 5.5 V). This rating applies independently to OUT1, OUT2, and OUT3 - with current limiting activating at ~0.9 A during short-circuit events. Derating is required above 70°C ambient per the dissipation rating table (584 mW at TA = 85°C).
Does the TPS2043ADR support dual-input voltage domains, and how are they configured?
Yes, the TPS2043ADR supports two independent input domains: IN1/GNDA powers OUT1 and OUT2, while IN2/GNDB powers OUT3. GNDA and GNDB are separate ground terminals and must not be shorted on the PCB - this isolation enables operation from different supply rails (e.g., 5 V and 3.3 V) and prevents fault propagation between domains. The datasheet explicitly confirms this architecture in the Terminal Functions table and functional block diagram.
What is the enable logic polarity for the TPS2043ADR, and how does it differ from the TPS2053ADR?
The TPS2043ADR uses active-low enable inputs (EN1, EN2, EN3): a logic low turns on the corresponding switch. This differs from the TPS2053ADR, which uses active-high enables. Both share identical pinout, current rating, and protection features - the sole functional difference is enable polarity, confirmed in the "Terminal Functions" section of SLVS247 and the "AVAILABLE OPTIONS" table listing "Active low" for TPS2043AD(R).
How does the TPS2043ADR handle overtemperature conditions, and is fault isolation guaranteed?
The TPS2043ADR implements channel-isolated thermal protection: when junction temperature reaches ~140°C, only the switch experiencing overcurrent or overload is disabled - adjacent channels remain operational. Recovery occurs automatically after cooling ~20°C (to ~120°C). This behavior is explicitly documented in the "thermal sense" section of the datasheet and verified in the functional block diagram showing independent thermal sense paths per switch.
Can the TPS2043ADR be used with input voltages below 3.3 V, and what is the minimum supported voltage?
Yes, the TPS2043ADR operates down to 2.7 V input, as specified in the "recommended operating conditions" table (VI(IN) min = 2.7 V). Its internal charge pump enables full gate drive at this voltage, ensuring reliable turn-on. Performance metrics - including 80 mΩ rDS(on) and 2.5-ms rise time - are characterized at 2.7 V, 3.3 V, and 5.5 V, confirming robust low-voltage operation without external components.
TPS2043ADR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- 0°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
TPS2043ADR FAQ
1.How can I place an order for TPS2043ADR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2043ADR 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 TPS2043ADR reliable?
The price and inventory of TPS2043ADR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2043ADR is usually 5 days.
3.What payment methods are accepted for TPS2043ADR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2043ADR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2043ADR?
TPS2043ADR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2043ADR 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 TPS2043ADR?
For technical support, including TPS2043ADR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2043ADR requirements.
6.How does Aetrix verify that TPS2043ADR is sourced from the original manufacturer or authorized distributors?
All TPS2043ADR 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 TPS2043ADR meets industry standards.
7.What is the process for return or replacement of TPS2043ADR?
All TPS2043ADR units undergo pre-shipment inspection (PSI). If there is an issue with TPS2043ADR, 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 TPS2043ADR part is unused and in its original packaging.
Return procedure for TPS2043ADR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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