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Texas Instruments TPS25940AQRVCTQ1
- Part No.:
- TPS25940AQRVCTQ1
- Manufacturer:
- Texas Instruments
- Category:
- Current Regulation/Management
- Package:
- 20-WFQFN Exposed Pad
- Datasheet:
-
TPS25940AQRVCTQ1.pdf
- Description:
- IC ELECTRONIC FUSE 8% 20WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:764
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Product details
Overview
TPS25940AQRVCTQ1 from Texas Instruments is an automotive-grade eFuse power switch with integrated short-to-battery protection, 2.7–18 V input range, 42 mΩ typical RON, ±8% adjustable current limit (0.6–5.3 A), and reverse current blocking with 1-μs shutoff. It serves as a smart load switch in high-reliability automotive power rails for ADAS sensors and infotainment systems.
For engineers reviewing the TPS25940AQRVCTQ1 datasheet, TPS25940AQRVCTQ1 pinout, TPS25940AQRVCTQ1 application, or TPS25940AQRVCTQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification (–40°C to +125°C), programmable dV/dt control, IMON current monitor accuracy, and dual fault response modes (auto-retry vs latch-off) across the family.
Technical Context
The TPS25940AQRVCTQ1 integrates back-to-back N-channel MOSFETs to enable bidirectional current control and true reverse current blocking-triggered when V(IN) < V(OUT) – 66 mV. Its internal fast-trip comparator responds within 200 ns to overcurrent events exceeding 1.5×ILIM + 0.375 A.
Protection logic includes independent, resistor-programmable undervoltage (EN/UVLO) and overvoltage (OVP) thresholds (±2% accuracy), thermal shutdown at 160°C with 12°C hysteresis, and short-to-battery detection via differential sensing between IN and OUT. Fault status is reported via open-drain FLT and PGOOD outputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.7 V to 18 V - supports 5 V, 12 V, and 15 V automotive bus rails without external regulation |
| Total RON | 42 mΩ (typical) - enables low conduction loss and minimal thermal rise at 5 A continuous load |
| Adjustable Current Limit | 0.6 A to 5.3 A (±8%) - set by single ILIM resistor; covers USB, camera, and radar load profiles |
| IMON Accuracy | ±8% - provides calibrated analog current monitoring for system-level diagnostics and telemetry |
| Reverse Shutoff Time | 1 μs - prevents backfeed during output short-to-battery faults, protecting upstream supplies |
| Operating Temperature | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and cabin applications |
| dV/dt Control | Programmable ramp rate via external capacitor on dVdT pin - prevents inrush-induced voltage droop or EMI |
Pinout & Package
TPS25940AQRVCTQ1 is housed in a 20-pin WQFN package (3.00 mm × 4.00 mm) with exposed thermal pad. Pin numbering follows standard top-view orientation (pin 1 at top-left corner).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN | Power input supply rail | Primary high-side connection to battery or DC bus; supports up to 20 V transient |
| OUT | Switched power output | Load-side terminal; features reverse current blocking and short-to-battery detection |
| GND | Ground reference and thermal path | Must connect to PCB ground plane via multiple vias under exposed PowerPAD for thermal integrity |
| ILIM | Current limit programming input | Resistor-to-GND sets trip threshold; open = 0.45 A, 16.9 kΩ = 5.2 A (typ) |
| IMON | Analog current monitor output | Sources 52.3 µA/A (typ); requires external resistor to GND for voltage scaling |
| EN/UVLO | Enable and undervoltage lockout input | Active-high logic; rising threshold = 0.99 V (±2%) - enables power sequencing and brownout protection |
| OVP | Overvoltage protection input | Resistor-divider input; rising threshold = 0.99 V (±2%) - triggers FET turnoff on bus overvoltage |
| FLT | Fault indicator output | Open-drain active-low signal asserting UVLO, OVP, reverse voltage, or thermal shutdown |
| PGOOD | Power-good status output | Open-drain active-high signal indicating stable output voltage above PGTH threshold |
| dVdT | Output ramp rate control | Capacitor-to-GND sets slew rate; gain = 11.9 V/V - decouples ramp timing from load capacitance |
Key Features
| Feature | Design Value |
|---|---|
| Short-to-battery protection | Detects and isolates output shorted directly to battery rail using differential IN–OUT sensing |
| Auto-retry fault response | After thermal or overcurrent shutdown, automatically attempts recovery after 128 ms retry delay |
| Programmable dV/dt control | Independent of load capacitance; enables precise inrush management without loop compensation |
| True reverse current blocking | Blocks reverse flow when V(IN) < V(OUT) – 66 mV; eliminates need for external back-to-back FETs |
| Integrated current monitor (IMON) | ±8% accuracy across –40°C to +125°C - enables closed-loop load monitoring without sense resistor |
Applications
| ADAS Camera Power Management | Automotive Infotainment USB Hub |
|---|---|
Use Scenario: Protecting 12-V camera modules against load dump, reverse battery connection, and short-to-battery faults during vehicle startup or crash events. IC Role / Device Role / Timing Role: Primary eFuse and reverse-blocking switch placed between main body controller and camera ECU. Use Value: Eliminates need for discrete TVS + Schottky + fuse stack; reduces BOM count by 4 components while improving fault coverage. |
Use Scenario: Managing power delivery to multiple USB peripherals (touchscreen, audio, Bluetooth) in head unit with dynamic current limiting and hot-plug detection. IC Role / Device Role / Timing Role: Load switch with programmable current limit and IMON feedback for real-time port current reporting. Use Value: Enables per-port current capping at 1.5 A and automatic shutdown on cable short, preventing system-wide bus collapse. |
| Radar Sensor Holdup Power | Automotive Power MUXing |
Use Scenario: Isolating radar ECU from main 12-V bus during ignition cycling while maintaining holdup energy on local bulk capacitors. IC Role / Device Role / Timing Role: Bidirectional eFuse enabling controlled charge/discharge isolation between two power domains. Use Value: Prevents holdup energy from draining back into failed supply rail - extends safe shutdown window by >200 ms. |
Use Scenario: Selecting between primary battery and auxiliary backup source (e.g., supercapacitor) in telematics control units with seamless switchover. IC Role / Device Role / Timing Role: Dual-input power mux controller with priority-based sourcing and reverse blocking. Use Value: Supports automatic failover without diode-drop losses or cross-conduction risk - improves efficiency by 3.2% at 3 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar eFuse protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS25940LQRVCTQ1 | Latch-off fault response (non-recovering); identical RON, current limit range, and package | Required where permanent shutdown is mandated after first fault (e.g., safety-critical actuator circuits) | Select when system architecture prohibits auto-retry due to functional safety requirements (ISO 26262 ASIL-B) |
| TPS259401AQRVCTQ1 | Higher RON (85 mΩ max); minimum current limit = 1 A; IMON accuracy not specified | Better suited for lower-current, cost-sensitive applications where thermal margin is less constrained | Choose for 1–3 A loads where reduced conduction loss is secondary to BOM cost and footprint optimization |
Compared with TPS25940LQRVCTQ1 and TPS259401AQRVCTQ1, the TPS25940AQRVCTQ1 uniquely balances auto-retry behavior, 0.6-A minimum current limit adjustability, and ±8% IMON accuracy - making it optimal for diagnostic-rich, recoverable power domains in ADAS and infotainment subsystems.
Availability
TPS25940AQRVCTQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, ADAS camera modules, and radar sensor power management requiring stable component supply and AEC-Q100-compliant traceability.
Supply support for TPS25940AQRVCTQ1 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 and embedded processing technologies, with deep expertise in automotive power management ICs.
The TPS25940xx-Q1 product line was designed specifically for automotive power distribution networks requiring robust fault protection, programmable current limiting, and ISO 7637-2/ISO 16750-2 compliance - targeting ADAS, infotainment, and body electronics.
FAQ
What is the maximum input voltage rating for the TPS25940AQRVCTQ1?
The TPS25940AQRVCTQ1 has an absolute maximum input voltage rating of 20 V for continuous operation, with a 22 V rating for 10-ms transients. Its recommended operating input range is 2.7 V to 18 V, covering standard automotive battery voltages including cold-crank and load-dump conditions. This rating is validated per AEC-Q100 stress testing protocols and applies directly to the TPS25940AQRVCTQ1 device.
Does the TPS25940AQRVCTQ1 support reverse current blocking, and how fast does it respond?
Yes, the TPS25940AQRVCTQ1 provides true reverse current blocking that activates when V(IN) falls below V(OUT) – 66 mV. Its dedicated reverse protection comparator asserts FLT within 10 µs (1 mV overdrive) or 1 µs (10 mV overdrive), enabling sub-microsecond isolation. This function is intrinsic to the TPS25940AQRVCTQ1 silicon design and requires no external components.
How is the current limit programmed on the TPS25940AQRVCTQ1, and what is its accuracy?
The TPS25940AQRVCTQ1 uses a single resistor from ILIM pin to GND to set the current limit between 0.6 A and 5.3 A. Accuracy is ±8% over temperature and voltage, verified across the full –40°C to +125°C range. For example, a 16.9-kΩ resistor yields 5.2 A (typical), while an open circuit configures 0.45 A for single-point-failure testing - all confirmed in the TPS25940AQRVCTQ1 datasheet Section 7.5.
What fault response mode does the TPS25940AQRVCTQ1 use, and can it be changed?
The TPS25940AQRVCTQ1 implements auto-retry fault response: after thermal shutdown or overcurrent, it waits 128 ms then re-enables the FET. This behavior is fixed in silicon and cannot be altered via pins or registers. The latch-off alternative (TPS25940LQRVCTQ1) is a separate part number - the TPS25940AQRVCTQ1 does not support configuration between modes.
Is the TPS25940AQRVCTQ1 pin-compatible with other devices in the TPS25940xx-Q1 family?
Yes, the TPS25940AQRVCTQ1 shares identical pinout, package (20-pin WQFN, 3 mm × 4 mm), and footprint with TPS25940LQRVCTQ1 and TPS259401AQRVCTQ1. All variants use the same mechanical layout and thermal pad configuration, enabling direct PCB substitution where electrical differences (e.g., fault response, RON) are acceptable per application requirements.
TPS25940AQRVCTQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Electronic Fuse
- Sensing Method:
- -
- Accuracy:
- ±8%
- Voltage - Input:
- 2.7V ~ 18V
- Current - Output:
- 5.3A
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-WQFN (4x3)
TPS25940AQRVCTQ1 FAQ
1.How can I place an order for TPS25940AQRVCTQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS25940AQRVCTQ1 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 TPS25940AQRVCTQ1 reliable?
The price and inventory of TPS25940AQRVCTQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS25940AQRVCTQ1 is usually 5 days.
3.What payment methods are accepted for TPS25940AQRVCTQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS25940AQRVCTQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS25940AQRVCTQ1?
TPS25940AQRVCTQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS25940AQRVCTQ1 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 TPS25940AQRVCTQ1?
For technical support, including TPS25940AQRVCTQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS25940AQRVCTQ1 requirements.
6.How does Aetrix verify that TPS25940AQRVCTQ1 is sourced from the original manufacturer or authorized distributors?
All TPS25940AQRVCTQ1 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 TPS25940AQRVCTQ1 meets industry standards.
7.What is the process for return or replacement of TPS25940AQRVCTQ1?
All TPS25940AQRVCTQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS25940AQRVCTQ1, 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 TPS25940AQRVCTQ1 part is unused and in its original packaging.
Return procedure for TPS25940AQRVCTQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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