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Texas Instruments TPS2021IDRQ1
- Part No.:
- TPS2021IDRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS2021IDRQ1.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,160
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Product details
Overview
TPS2021IDRQ1 from Texas Instruments is an automotive-qualified 50-mΩ N-channel high-side power distribution switch with 0.9-A current-limit threshold, logic-level enable input, and integrated overcurrent/thermal/UVLO protection. It operates from 2.7 V to 5.5 V and delivers controlled 6.1-ms rise time for inrush current limiting in hot-plug USB peripherals and infotainment modules.
For engineers reviewing the TPS2021IDRQ1 datasheet, TPS2021IDRQ1 pinout, TPS2021IDRQ1 application, or TPS2021IDRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, SOIC-8 package, 0.9-A short-circuit current limit, active-low OC output, and compatibility with 3-V/5-V logic enable signals in automotive power rail management.
Technical Context
The TPS2021IDRQ1 integrates an internal charge pump enabling gate drive above source voltage for full enhancement of its N-channel MOSFET switch across 2.7–5.5 V input range. Its current-sense FET architecture eliminates series shunt resistance, preserving efficiency while enabling precise constant-current limiting at 0.9 A (typical) during overload.
Thermal shutdown activates at ~140°C junction temperature with ~20°C hysteresis, and undervoltage lockout disables the switch below ~2 V input. The open-drain OC pin asserts low on overcurrent or thermal fault and remains latched until fault removal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current Limit Threshold | 0.9 A (typical at 25°C); sets maximum safe load current before entering constant-current mode |
| rDS(on) | 33 mΩ (typical at 5 V, 25°C); determines conduction loss and thermal dissipation under load |
| Input Voltage Range | 2.7 V to 5.5 V; supports wide automotive battery and regulated rail operation without external regulators |
| Rise Time (tr) | 6.1 ms (typical, VI=5.5 V, CL=1 mF); limits inrush current to protect upstream supply and downstream capacitors |
| Enable Logic | Active-low EN; compatible with TTL/CMOS logic; pulls switch off when high, reducing standby current to ≤10 mA |
| OC Output Type | Open-drain, active-low; provides fault signaling to MCU GPIOs without level-shifting components |
| Ambient Temp Range | –40°C to +85°C; certified for under-hood and cabin-mounted automotive electronics |
Pinout & Package
TPS2021IDRQ1 is housed in an 8-pin SOIC (D) package with exposed pad for thermal performance. Pin numbering follows standard SOIC top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Return path for internal charge pump, driver, and sense circuitry; must be low-impedance connection |
| IN (Pins 2, 3) | Input power supply | Parallel-input configuration reduces trace resistance and improves current sharing; accepts 2.7–5.5 V |
| EN (Pin 4) | Enable control input | Active-low logic signal; high = switch disabled, low = switch enabled; TTL/CMOS compatible |
| OC (Pin 5) | Overcurrent fault indicator | Open-drain output pulled low during overcurrent or thermal fault; requires external pull-up resistor |
| OUT (Pins 6, 7, 8) | Switched power output | Three parallel output pins reduce bond-wire resistance and enhance current capability up to 0.9 A |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Qualified | Automotive-grade reliability validated for –40°C to +85°C ambient operation per Grade 3 requirements |
| Integrated Charge Pump | Enables full gate drive from 2.7 V input; eliminates need for external boost circuitry or higher-voltage rails |
| No Back-Gate Diode | Prevents reverse current flow from OUT to IN during hot-swap events or supply sequencing faults |
| UL Listed (E169910) | Meets UL 60950-1 safety standards for end-equipment certification in industrial and automotive systems |
| ESD Protection | 2-kV HBM / 200-V MM rating ensures robustness against handling and board-level ESD events |
Applications
| USB Peripheral Power Switching | Infotainment System Load Management |
|---|---|
|
Use Scenario: Hot-plugging USB devices (e.g., diagnostic tools, media adapters) into powered vehicle head units. IC Role / Device Role / Timing Role: High-side power switch controlling VBUS delivery with controlled 6.1-ms ramp to limit inrush. Use Value: Prevents brownout of main 5-V rail and avoids false resets in host MCU during plug-in events. |
Use Scenario: Isolating display backlight, audio amplifier, or tuner modules during firmware updates or fault recovery. IC Role / Device Role / Timing Role: Protected power rail switch with OC fault reporting to system controller via GPIO. Use Value: Enables safe module power cycling without interrupting core processor or CAN communication bus. |
| Body Control Module (BCM) Sub-Rail Protection | ADAS Camera Power Sequencing |
|
Use Scenario: Distributing switched 5-V power to door locks, window motors, or mirror controls in BCM. IC Role / Device Role / Timing Role: Fault-tolerant power switch with thermal shutdown and automatic recovery after cooling. Use Value: Sustains operation during momentary shorts (e.g., wiring chafing) and self-recovers without ECU intervention. |
Use Scenario: Powering rear-view or surround-view cameras requiring clean startup and fault isolation. IC Role / Device Role / Timing Role: Current-limited, UVLO-protected switch ensuring stable camera boot before image streaming. Use Value: Eliminates video glitches caused by supply sag during camera power-on and prevents damage from cable shorts. |
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 |
|---|---|---|---|
| TPS2022DRQ1 | Higher 1.5-A current limit; same SOIC-8 package and pinout | Better suited for higher-power loads like HVAC actuators or multi-sensor clusters | Select when load current exceeds 0.9 A but thermal budget allows higher rDS(on) at elevated temperature |
| TPS2051BDRQ1 | Lower 1.5-A limit, but adds programmable current limit via external resistor; same AEC-Q100 grade | Enables fine-tuned protection for mixed-load subsystems without redesigning PCB layout | Choose when design requires adjustable trip point or future-proofing for variant configurations |
Compared with TPS2021IDRQ1, TPS2022DRQ1 offers higher current capacity with identical footprint and control interface, while TPS2051BDRQ1 trades fixed threshold for programmability-both require no PCB changes but differ in fault response granularity and thermal margin.
Availability
TPS2021IDRQ1 is available at Aetrix Electronics and suitable for automotive body electronics, infotainment subsystems, and ADAS camera power management requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS2021IDRQ1 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 automotive ICs, with decades of experience in power management innovation.
The TPS202x-Q1 family was designed specifically for automotive power distribution-delivering robust, current-limited, thermally protected switching in space-constrained SOIC packages for under-dash and in-cabin electronics.
FAQ
What is the current-limit threshold of the TPS2021IDRQ1?
The TPS2021IDRQ1 has a typical short-circuit current limit of 0.9 A at 25°C, with a specified range of 0.66 A to 1.1 A across temperature and process variation. This threshold is factory-trimmed and does not require external components. The TPS2021IDRQ1 enters constant-current mode when load current exceeds this value, maintaining safe power dissipation while sustaining output voltage regulation.
Does the TPS2021IDRQ1 support 3.3-V logic enable inputs?
Yes, the TPS2021IDRQ1 EN pin is fully compatible with 3.3-V logic: a logic-low voltage ≤0.5 V enables the switch, and a logic-high voltage ≥2 V disables it-meeting both TTL and CMOS thresholds across its full operating temperature range. This allows direct interfacing with 3.3-V microcontrollers without level-shifting circuitry, simplifying system design in modern automotive ECUs.
How does the OC pin behave during a short-circuit event on the TPS2021IDRQ1?
During a short-circuit event, the TPS2021IDRQ1's OC pin transitions to a low state (≤0.4 V at 10 mA sink) within microseconds and remains asserted until the fault is removed. It does not auto-clear during thermal cycling-only deasserts once the overload condition ends and the device exits constant-current mode. This behavior enables reliable fault logging and system-level recovery sequencing in automotive controllers.
Can the TPS2021IDRQ1 operate from a 2.7-V supply?
Yes, the TPS2021IDRQ1 is fully functional down to 2.7 V input, thanks to its integrated charge pump that maintains sufficient gate overdrive for the N-channel MOSFET. At 2.7 V, rise time extends to 8.6 ms (vs. 6.1 ms at 5.5 V), providing even gentler inrush control-critical for low-voltage battery scenarios such as cold-cranking or start-stop systems where supply stability is marginal.
Is the TPS2021IDRQ1 pin-compatible with other TPS202x-Q1 variants?
Yes, all TPS202x-Q1 devices-including TPS2020IDRQ1, TPS2021IDRQ1, TPS2022DRQ1, and TPS2024IDRQ1-share identical SOIC-8 (D) packaging and pinout. This enables drop-in replacement across current-limit grades (0.3 A to 3 A) without PCB revision, supporting scalable design reuse and simplified inventory management in automotive platforms with varying load requirements.
TPS2021IDRQ1 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:
- 1
- 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):
- 600mA
- Rds On (Typ):
- 33mOhm
- Input Type:
- Inverting
- Features:
- Status Flag
- Fault Protection:
- Current Limiting (Fixed), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS2021IDRQ1 FAQ
1.How can I place an order for TPS2021IDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2021IDRQ1 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 TPS2021IDRQ1 reliable?
The price and inventory of TPS2021IDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2021IDRQ1 is usually 5 days.
3.What payment methods are accepted for TPS2021IDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2021IDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2021IDRQ1?
TPS2021IDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2021IDRQ1 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 TPS2021IDRQ1?
For technical support, including TPS2021IDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2021IDRQ1 requirements.
6.How does Aetrix verify that TPS2021IDRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS2021IDRQ1 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 TPS2021IDRQ1 meets industry standards.
7.What is the process for return or replacement of TPS2021IDRQ1?
All TPS2021IDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS2021IDRQ1, 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 TPS2021IDRQ1 part is unused and in its original packaging.
Return procedure for TPS2021IDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS2021IDRQ1 Tags
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TPS22919DCKR
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