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Texas Instruments TPS746125PQWDRBRQ1
- Part No.:
- TPS746125PQWDRBRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS746125PQWDRBRQ1.pdf
- Description:
- IC POWER
- Quantity:
- Payment:
- Shipping:
Inventory:2,780
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Product details
Overview
TPS746125PQWDRBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified 1A ultra-low-dropout linear regulator with power-good (PG) output, fixed 1.25V output, 265mV max dropout at 1A, ±1.5% output accuracy over –40°C to +125°C, and stable operation with ≥1µF ceramic output capacitance. It powers critical subsystems in automotive infotainment and ADAS sensors where supply stability and fault monitoring are essential.
For engineers reviewing the TPS746125PQWDRBRQ1 datasheet, TPS746125PQWDRBRQ1 pinout, TPS746125PQWDRBRQ1 application, or TPS746125PQWDRBRQ1 equivalent, key selection criteria include its wettable-flank 3mm × 3mm VSON-8 package for optical solder inspection, push-pull PG output capability (VOUT ≥ 1.0V), functional safety documentation support, and thermal resistance of 55.5°C/W (RθJA) enabling high-power-density automotive PCB layouts.
Technical Context
The TPS746125PQWDRBRQ1 implements a precision band-gap reference and error amplifier to achieve ±0.85% typical output accuracy at 25°C and ±1.5% over full temperature range. Its foldback current limit reduces thermal dissipation during short-circuit events, while integrated UVLO (1.21–1.47V rising threshold) prevents erratic startup under low-input conditions.
This device supports both fixed-output (1.25V) and adjustable configurations; the TPS746125PQWDRBRQ1 variant is factory-set to 1.25V and uses the DRB (8-pin VSON) wettable flank package. Power-good logic monitors feedback voltage at 92% (rising) and 90% (falling) of nominal VOUT with 2% hysteresis, enabling reliable sequencing in multi-rail systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.25V ±1.5% over –40°C to +125°C - ensures stable core voltage for automotive MCUs and image signal processors. |
| Max Output Current | 1A continuous - sufficient to power SoC cores, DDR termination, or camera sensor analog rails without derating. |
| Dropout Voltage | 265mV maximum at 1A (for 1.25V output) - enables operation from 1.5V input, supporting post-regulation from buck converters. |
| PSRR | 38dB at 100kHz - suppresses switching noise from upstream DC/DC converters, critical for noise-sensitive analog circuits. |
| Quiescent Current | 25µA typical - minimizes standby power loss in always-on automotive modules like telematics and radar. |
| Thermal Resistance | RθJA = 55.5°C/W (DRB package) - allows >1W dissipation at ambient 85°C with standard 2-layer PCB, reducing need for heatsinking. |
| Power-Good Output | Push-pull topology, 92%/90% VOUT thresholds - eliminates external pull-up resistor, simplifies sequencing and reduces BOM count. |
Pinout & Package
TPS746125PQWDRBRQ1 is housed in a 3mm × 3mm wettable flank VSON-8 (DRB) package with exposed thermal pad electrically connected to GND. This package enables automated optical inspection (AOI) of solder joints and provides low thermal resistance (RθJA = 55.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT | Regulated output | Delivers 1.25V to load; requires ≥1µF ceramic capacitor to ground for stability and transient response. |
| 2: NC | No internal connection | Must be grounded for optimal thermal performance; not electrically active but improves heat conduction. |
| 3: NC | No internal connection | Must be grounded for optimal thermal performance; second thermal enhancement pad. |
| 4: GND | Ground reference | Main return path for load, bias, and thermal pad; connects internally to exposed thermal pad. |
| 5: EN | Enable control input | Active-high logic; >1.0V enables regulator, <0.3V disables it with 1µA shutdown current. |
| 6: PG | Power-good status output | Push-pull output asserts high when VOUT ≥ 92% of 1.25V; sinks 2mA or sources 0.2mA. |
| 7: NC | No internal connection | Must be grounded for optimal thermal performance; third thermal enhancement pad. |
| 8: IN | Input supply | Accepts 1.5V–6.0V; requires ≥1µF ceramic capacitor to GND near pin for EMI suppression and transient response. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, meeting automotive reliability and lifetime requirements. |
| Functional Safety-Capable | Documentation available (FIT rate, FMEA, diagnostic coverage) to support ISO 26262 ASIL-B system-level safety analysis. |
| Wettable flank VSON-8 package | Enables AOI of solder fillets on all 8 side pins, improving manufacturing yield and field-reliability verification. |
| Active output discharge | Internally discharges OUT capacitor when disabled, preventing floating voltage and ensuring clean power-down sequencing. |
| Stable with small output capacitors | Guaranteed stability with 1µF–220µF ceramic COUT, reducing solution size and cost vs. traditional LDOs requiring ≥10µF. |
Applications
| Automotive Head Units | Front/Rear Cameras |
|---|---|
|
Use Scenario: Powering audio DSPs, touch controller ICs, and display interface logic in infotainment head units. IC Role / Device Role / Timing Role: Post-regulator delivering clean, sequenced 1.25V supply to low-voltage digital cores. Use Value: Ultra-low dropout enables use after 1.8V buck converter; PG output synchronizes boot with main SoC and memory initialization. |
Use Scenario: Supplying image signal processors (ISPs) and serializer ICs in ADAS camera modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO providing regulated 1.25V for ISP analog front-end and PLL circuitry. Use Value: 38dB PSRR at 100kHz attenuates switching noise from adjacent DC/DC converters, preserving image SNR. |
| Cluster Displays | Telematics Control Units |
|
Use Scenario: Powering TFT LCD timing controllers and GPU memory interfaces in digital instrument clusters. IC Role / Device Role / Timing Role: Fixed-output LDO with fast load transient response (<500µs startup) for dynamic backlight and graphics loads. Use Value: 25µA quiescent current minimizes battery drain during vehicle sleep mode; thermal shutdown protects against overheating in sealed enclosures. |
Use Scenario: Regulating power for cellular modems, GNSS receivers, and CAN transceivers in telematics gateways. IC Role / Device Role / Timing Role: Sequenced enable/power-good node ensuring modem firmware boots only after stable 1.25V rail is established. Use Value: Push-pull PG eliminates external pull-up resistor, reducing component count and board area in space-constrained TCUs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS74612PQWDRBRQ1 | Same DRB package and 1.2V fixed output; differs only in nominal voltage (1.2V vs 1.25V) and PG timing (standard vs 'B' version). | Used where 1.2V logic rails are required instead of 1.25V; identical thermal and sequencing behavior. | Select when system design specifies 1.2V tolerance and no PG delay modification is needed. |
| TLV76712DRVR | Non-automotive 1.2V LDO in 2mm × 2mm WSON-6; lacks AEC-Q100 qualification, PG output, and functional safety documentation. | Suitable for industrial or consumer applications with lower reliability requirements and no sequencing needs. | Choose only for cost-sensitive non-automotive designs where qualification, PG, and safety support are unnecessary. |
Compared with TPS746125PQWDRBRQ1, the TPS74612PQWDRBRQ1 offers identical automotive qualification and package but targets 1.2V rails, while TLV76712DRVR sacrifices qualification and PG functionality for lower cost and smaller footprint in non-safety-critical systems.
Availability
TPS746125PQWDRBRQ1 is available at Aetrix Electronics and suitable for automotive head units, front/rear cameras, and cluster displays requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for TPS746125PQWDRBRQ1 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 decades of automotive-grade product development and manufacturing expertise.
The TPS746-Q1 product line delivers ultra-low-dropout, AEC-Q100-qualified LDOs with integrated power-good and functional safety support for demanding automotive subsystems including ADAS, infotainment, and body electronics.
FAQ
What is the output voltage tolerance of the TPS746125PQWDRBRQ1 over temperature?
The TPS746125PQWDRBRQ1 maintains ±1.5% output voltage accuracy across its full operating junction temperature range of –40°C to +150°C. At 25°C, typical accuracy is ±0.85%, making it suitable for precision voltage rails in automotive microcontrollers and sensor interfaces where tight regulation is mandatory.
Does the TPS746125PQWDRBRQ1 require an external pull-up resistor on the PG pin?
No - the TPS746125PQWDRBRQ1 uses a push-pull power-good output, which actively drives high or low without needing an external pull-up resistor. This simplifies schematic design and reduces BOM count compared to open-drain alternatives that require external resistors.
Can the TPS746125PQWDRBRQ1 operate with a 1.5V input supply?
Yes - the TPS746125PQWDRBRQ1 supports an input voltage range of 1.5V to 6.0V. With a 1.25V output and maximum dropout of 265mV at 1A, it can regulate from 1.5V input down to 1.25V output, enabling use after low-voltage buck converters or battery-backed supplies.
What package type does the TPS746125PQWDRBRQ1 use, and why is it significant for automotive applications?
The TPS746125PQWDRBRQ1 uses the 3mm × 3mm wettable flank VSON-8 (DRB) package. Its side-wettable flanks allow automated optical inspection (AOI) of solder joints - a critical requirement for zero-defect automotive manufacturing and field reliability assurance.
Is the TPS746125PQWDRBRQ1 qualified for functional safety applications?
Yes - the TPS746125PQWDRBRQ1 is functional safety-capable, with documentation available to support ISO 26262 ASIL-B system-level safety analysis, including FIT rate data, failure mode analysis, and diagnostic coverage metrics for use in safety-critical automotive subsystems.
TPS746125PQWDRBRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.25V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.625V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 36 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Current Limit, Enable, Power Good
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 8-SON (3x3)
TPS746125PQWDRBRQ1 FAQ
1.How can I place an order for TPS746125PQWDRBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS746125PQWDRBRQ1 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 TPS746125PQWDRBRQ1 reliable?
The price and inventory of TPS746125PQWDRBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS746125PQWDRBRQ1 is usually 5 days.
3.What payment methods are accepted for TPS746125PQWDRBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS746125PQWDRBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS746125PQWDRBRQ1?
TPS746125PQWDRBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS746125PQWDRBRQ1 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 TPS746125PQWDRBRQ1?
For technical support, including TPS746125PQWDRBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS746125PQWDRBRQ1 requirements.
6.How does Aetrix verify that TPS746125PQWDRBRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS746125PQWDRBRQ1 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 TPS746125PQWDRBRQ1 meets industry standards.
7.What is the process for return or replacement of TPS746125PQWDRBRQ1?
All TPS746125PQWDRBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS746125PQWDRBRQ1, 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 TPS746125PQWDRBRQ1 part is unused and in its original packaging.
Return procedure for TPS746125PQWDRBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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