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Texas Instruments TPS2557QDRBRQ1
- Part No.:
- TPS2557QDRBRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS2557QDRBRQ1.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 8SON
- Quantity:
- Payment:
- Shipping:
Inventory:3,245
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Product details
Overview
TPS2557QDRBRQ1 from Texas Instruments is an AEC-Q100 qualified automotive power-distribution switch with adjustable current limiting (500 mA–5 A), 22-mΩ high-side N-channel MOSFET, 3.5-μs short-circuit response, and active-high enable logic - designed for USB charging ports in vehicles requiring precision overcurrent protection and thermal robustness.
For engineers reviewing the TPS2557QDRBRQ1 datasheet, TPS2557QDRBRQ1 pinout, TPS2557QDRBRQ1 application, or TPS2557QDRBRQ1 equivalent, key selection considerations include its ±6.5% current-limit accuracy at 4.5 A, 2.5–6.5 V operating range, 2-μA standby supply current, UL/IEC safety certifications, and functional-safety documentation support.
Technical Context
The TPS2557QDRBRQ1 integrates an internal charge pump to drive the N-channel MOSFET gate above source potential, enabling full enhancement down to 2.5 V input. Its current-limit loop dynamically regulates output current by modulating gate voltage during overload, forcing linear-mode operation to clamp IOUT at the programmed threshold.
It features dual thermal shutdown thresholds (135°C in current limit, 155°C unconditional), 8-ms deglitched FAULT assertion for overcurrent, and undervoltage lockout with 35-mV hysteresis - all implemented without external components beyond RILIM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Current-limit range | 500 mA to 5 A (typical), set via external RILIM (20–187 kΩ) |
| Current-limit accuracy | ±6.5% at 4.5 A - enables precise USB port compliance without margin stacking |
| rDS(on) | 22 mΩ (typ) at 25°C - minimizes power loss and thermal rise under full load |
| Short-circuit response | 3.5 μs (typ) - limits fault energy before downstream components are stressed |
| Enable logic | Active-high EN - simplifies interface with automotive microcontrollers using standard GPIO |
| Supply current (off) | ≤2 μA - supports low-quiescent-power always-on vehicle subsystems |
| Operating voltage | 2.5 V to 6.5 V - compatible with 5-V USB bus and wide-input automotive DC-DC stages |
Pinout & Package
TPS2557QDRBRQ1 uses an 8-pin S-PVSON package (3 mm × 3 mm) with exposed thermal pad connected internally to GND. The package supports high-power dissipation with RθJA = 41.5°C/W and RθJB = 16.4°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN (Pins 2,3) | Power input | Accepts 2.5–6.5 V supply; requires ≥0.1 μF ceramic capacitor to GND for stability |
| EN (Pin 4) | Enable control | Active-high logic input; VIH = 1.1 V min, VIL = 0.66 V max - TTL/CMOS compatible |
| FAULT (Pin 8) | Open-drain fault flag | Asserts low during overcurrent or overtemperature; includes 9-ms deglitch to suppress false triggers |
| OUT (Pins 6,7) | Switched output | Delivers current-limited power to load; pins paralleled for lower resistance and higher current handling |
| ILIM (Pin 5) | Current-limit programming | Sinks regulated current; sets ILIM via external resistor (20–187 kΩ); never drive directly |
| GND (Pin 1) | Ground reference | Primary ground return; thermal pad must be externally connected to PCB GND plane for thermal performance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualification | HBM ESD Level H2 (±2 kV), CDM Level C5 (±750 V) - validated for automotive production environments |
| Functional safety support | Documentation available per ISO 26262 ASIL-B system-level design - enables safety case development |
| USB current-limit compliance | Meets USB BC1.2 and Type-C current-limit requirements out-of-the-box with proper RILIM selection |
| Built-in soft-start | Controlled output rise/fall times (2–4 ms) - eliminates inrush surges into heavy capacitive loads like USB ports |
| System-level ESD robustness | 15-kV contact / 8-kV air discharge per IEC 61000-4-2 - protects against real-world vehicle ESD events |
Applications
| Automotive USB Charging Port | Infotainment Power Rail Protection |
|---|---|
Use Scenario: Single-port 5-V USB-A or USB-C charging circuit in center console or rear-seat module. IC Role / Device Role / Timing Role: High-side current-limited power switch controlling VBUS delivery and asserting FAULT on overcurrent or thermal fault. Use Value: Enables safe, standards-compliant charging of smartphones/tablets while protecting against shorted cables or faulty devices. | Use Scenario: Power distribution to USB hub, display backlight, or audio amplifier within head unit or digital cluster. IC Role / Device Role / Timing Role: Fault-isolating power switch with programmable current limit and thermal monitoring for mission-critical infotainment sub-systems. Use Value: Prevents single-point failure from cascading across shared 5-V rail; FAULT signal enables host MCU to log faults and initiate recovery. |
| Telematics Control Unit (TCU) Peripherals | ADAS Camera Power Sequencing |
Use Scenario: Powering GPS/GNSS receiver, cellular modem, or CAN transceiver in TCU module. IC Role / Device Role / Timing Role: Adjustable current-limited switch with auto-retry capability (via external RC on EN/FAULT) for self-healing peripheral power domains. Use Value: Maintains connectivity during transient overloads (e.g., antenna surge) without requiring host intervention or full system reset. | Use Scenario: Controlled power-up of front/rear camera modules with large decoupling capacitance in ADAS domain controller. IC Role / Device Role / Timing Role: Soft-starting power switch with precise current limiting to avoid violating camera sensor startup timing specs. Use Value: Eliminates voltage droop and brownout on shared 5-V rail during simultaneous camera initialization - ensures deterministic boot sequence. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-limited power-switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS2556QDRBRQ1 | Identical specs except active-low EN logic; same rDS(on), current range, and FAULT behavior | Requires inverted enable signal path; not drop-in for active-high MCU GPIO | Select when existing design uses active-low control or level-shifting is already present |
| TPS259211RGERQ1 | Higher integration: integrated FET + current sense + fast fault reporting (1.5 μs), but fixed 2.5-A limit and no RILIM adjustability | Used where ultra-fast response and diagnostic reporting outweigh need for programmability | Choose for space-constrained designs needing faster fault detection and built-in current monitoring |
Compared with TPS2557QDRBRQ1, TPS2556QDRBRQ1 offers identical protection performance but requires active-low enable signaling, while TPS259211RGERQ1 trades programmability for faster fault response and integrated diagnostics - making TPS2557QDRBRQ1 optimal for flexible, cost-sensitive automotive USB port designs.
Availability
TPS2557QDRBRQ1 is available at Aetrix Electronics and suitable for automotive USB charging ports, infotainment power rails, and telematics peripheral protection requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.
Supply support for TPS2557QDRBRQ1 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-grade ICs, with decades of experience in high-reliability power management solutions.
The TPS255x-Q1 product line delivers precision current-limited power switches optimized for automotive USB charging, infotainment, and ADAS subsystems - emphasizing AEC-Q100 reliability, functional safety readiness, and system-level ESD immunity.
FAQ
What is the maximum continuous output current supported by the TPS2557QDRBRQ1?
The TPS2557QDRBRQ1 supports a maximum continuous output current of 5 A (typical), programmable via external RILIM. At this level, current-limit accuracy is ±6.5%, and thermal shutdown activates at 135°C if sustained. Derating is required above ambient temperatures >85°C due to RθJA = 41.5°C/W. The TPS2557QDRBRQ1 maintains regulation even during short circuits by entering constant-current mode.
How does the TPS2557QDRBRQ1 differ from the TPS2556QDRBRQ1?
The TPS2557QDRBRQ1 and TPS2556QDRBRQ1 share identical electrical specifications - including 22-mΩ rDS(on), 5-A current limit, 3.5-μs fault response, and thermal thresholds - but differ only in enable logic polarity: TPS2557QDRBRQ1 uses active-high EN, while TPS2556QDRBRQ1 uses active-low EN. Pinout, package, and all other functions are identical. The TPS2557QDRBRQ1 is not pin-compatible with TPS2556QDRBRQ1 in systems requiring direct EN signal substitution.
Can the TPS2557QDRBRQ1 be used in non-automotive applications?
Yes, the TPS2557QDRBRQ1 can be used in industrial or consumer applications requiring robust current limiting, but its AEC-Q100 qualification, automotive temperature range (–40°C to +125°C), and system-level ESD ratings provide over-spec margins. However, cost and qualification overhead may make non-automotive alternatives like TPS2557DRBR more appropriate unless automotive-grade reliability is explicitly needed. The TPS2557QDRBRQ1 remains fully functional outside automotive contexts.
What is the purpose of the ILIM pin on the TPS2557QDRBRQ1, and how is it configured?
The ILIM pin on the TPS2557QDRBRQ1 sinks a regulated internal current used to set the output current-limit threshold via an external resistor to GND. With RILIM = 24.9 kΩ, the TPS2557QDRBRQ1 delivers 4.5 A (typ); values from 20 kΩ to 187 kΩ yield 5 A down to 500 mA. The resistor must be placed close to the IC with minimal trace length to preserve accuracy. Driving ILIM directly with voltage or current sources will damage the TPS2557QDRBRQ1.
Does the TPS2557QDRBRQ1 support auto-retry functionality, and how is it implemented?
Yes, the TPS2557QDRBRQ1 supports auto-retry via external RC network between FAULT and EN. When FAULT asserts low during overcurrent, it pulls EN below its turnoff threshold, disabling the switch. As FAULT goes high-impedance, the RC network recharges EN, re-enabling the device after a time determined by R × C. This cycle repeats until fault removal. The TPS2557QDRBRQ1 does not include internal auto-retry - implementation requires external 100-kΩ resistor and capacitor selected for desired retry interval.
TPS2557QDRBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Package/Case:
- 8-VDFN Exposed Pad
- 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:
- 2.5V ~ 6.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 5A
- Rds On (Typ):
- 22mOhm
- Input Type:
- Non-Inverting
- Features:
- Slew Rate Controlled, Status Flag
- Fault Protection:
- Current Limiting (Adjustable), Over Temperature, UVLO
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SON (3x3)
TPS2557QDRBRQ1 FAQ
1.How can I place an order for TPS2557QDRBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS2557QDRBRQ1 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 TPS2557QDRBRQ1 reliable?
The price and inventory of TPS2557QDRBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS2557QDRBRQ1 is usually 5 days.
3.What payment methods are accepted for TPS2557QDRBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS2557QDRBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS2557QDRBRQ1?
TPS2557QDRBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS2557QDRBRQ1 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 TPS2557QDRBRQ1?
For technical support, including TPS2557QDRBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS2557QDRBRQ1 requirements.
6.How does Aetrix verify that TPS2557QDRBRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS2557QDRBRQ1 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 TPS2557QDRBRQ1 meets industry standards.
7.What is the process for return or replacement of TPS2557QDRBRQ1?
All TPS2557QDRBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS2557QDRBRQ1, 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 TPS2557QDRBRQ1 part is unused and in its original packaging.
Return procedure for TPS2557QDRBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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