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Texas Instruments TPS74550PQWDRBRQ1
- Part No.:
- TPS74550PQWDRBRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
TPS74550PQWDRBRQ1.pdf
- Description:
- IC POWER
- Quantity:
- Payment:
- Shipping:
Inventory:2,898
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Product details
Overview
TPS74550PQWDRBRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive ultra-low-dropout (LDO) regulator delivering 500 mA with power-good (PG) output, fixed 5.0 V output, 2-mm × 2-mm wettable-flank WSON-6 package, ±0.85% output accuracy at 25°C, and 160 mV max dropout at 500 mA - used for powering infotainment processors and camera sensor rails in head units and front/rear ADAS cameras.
For engineers reviewing the TPS74550PQWDRBRQ1 datasheet, TPS74550PQWDRBRQ1 pinout, TPS74550PQWDRBRQ1 application, or TPS74550PQWDRBRQ1 equivalent, key selection criteria include automotive-grade thermal robustness (–40°C to +125°C ambient), wettable-flank optical inspection support, PG open-drain/push-pull configurability, and stability with ≥1-µF ceramic output capacitance.
Technical Context
The TPS74550PQWDRBRQ1 implements a precision band-gap reference and error amplifier to achieve ±0.85% output accuracy at 25°C and ±1.5% over full temperature range. Its internal foldback current limit reduces thermal dissipation during short-circuit events, while integrated UVLO (1.17–1.42 V) and thermal shutdown (170°C trip) ensure system-level fault protection.
Power-good monitoring operates via feedback-pin voltage comparison with programmable thresholds (PGHTH = 92% VOUT, PGLTH = 90% VOUT, 2% hysteresis); PG output supports both open-drain and push-pull topologies - push-pull enabled only for VOUT ≥ 1.0 V, matching the fixed 5.0 V configuration of TPS74550PQWDRBRQ1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output current | 500 mA maximum - supports high-current digital loads like SoC I/O rails and image sensor interfaces without external boost stages. |
| Dropout voltage | 160 mV max at 500 mA (3.3 VOUT) - enables operation from low-input sources such as post-buck 3.3 V or 5.0 V rails with minimal headroom loss. |
| Output accuracy | ±0.85% at 25°C, ±1.5% over –40°C to +125°C - ensures stable voltage margining for automotive microcontrollers and SerDes PHYs. |
| PSRR | 45 dB at 100 kHz - suppresses switching noise from upstream DC/DC converters feeding sensitive analog or RF subsystems. |
| Quiescent current | 25 µA typical, 1.5 µA in shutdown - extends battery runtime in always-on vehicle modules (e.g., telematics wake-up circuits). |
| Input voltage range | 1.5 V to 6.0 V - compatible with wide-range automotive supply domains including 3.3 V, 5.0 V, and partially discharged 12 V battery derivatives. |
| Thermal resistance | RθJA = 80.3°C/W (WSON-6) - enables compact layout on 2-layer PCBs without forced airflow in sealed enclosures. |
Pinout & Package
TPS74550PQWDRBRQ1 uses a 6-pin, 2.0 mm × 2.0 mm wettable-flank WSON package (DRV variant) with exposed thermal pad electrically tied to GND. Wettable flanks enable automated optical inspection (AOI) of solder joints - critical for automotive manufacturing traceability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Regulated output | Delivers stable 5.0 V to load; requires ≥1-µF ceramic capacitor to ground for stability and transient response. |
| 2 - FB | Feedback input | Internally connected to 5.0 V divider; not accessible - fixed-output version eliminates external resistor network and associated tolerance drift. |
| 3 - GND | Ground reference | Primary return path; thermal pad must be soldered to GND plane for optimal thermal performance and EMI control. |
| 4 - EN | Enable control | Active-high logic input (VEN(HI) ≥ 1.0 V); enables sequencing with upstream regulators or MCU GPIOs. |
| 5 - PG | Power-good indicator | Open-drain output (pull-up required externally); asserts high when VOUT ≥ 92% of nominal - used for system reset coordination. |
| 6 - IN | Input supply | Accepts 1.5–6.0 V input; requires ≥1-µF ceramic capacitor to ground near pin for PSRR and transient immunity. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive cabin and engine bay thermal requirements without derating. |
| Wettable-flank WSON-6 package | Enables AOI-capable solder joint inspection - satisfies IATF 16949 process control requirements for zero-defect automotive assembly. |
| Ultra-low dropout (160 mV @ 500 mA) | Minimizes power loss and heat generation in space-constrained modules - critical for thermally isolated camera housings. |
| Active output discharge | Forces rapid VOUT discharge on shutdown - prevents floating rail conditions that could cause latch-up in downstream logic or interface ICs. |
| Functional safety documentation support | Includes FIT rate, failure mode analysis, and diagnostic coverage data - accelerates ISO 26262 ASIL-B system-level certification. |
Applications
| Automotive Head Units | Front/Rear ADAS Cameras |
|---|---|
|
Use Scenario: Powering display controller, audio codec, and USB interface in centralized infotainment head units. IC Role / Device Role / Timing Role: Primary 5.0 V LDO supplying core logic and peripheral I/O rails with tight regulation and fast load transient response. Use Value: Maintains ±1.5% output accuracy across –40°C to +125°C ambient, ensuring reliable HDMI/MIPI D-PHY timing margins under thermal stress. |
Use Scenario: Regulating 5.0 V supply for CMOS image sensors and ISP processors in driver-monitoring and surround-view systems. IC Role / Device Role / Timing Role: Post-regulator after buck converter, providing clean, low-noise 5.0 V with PG signaling for sensor initialization sequence. Use Value: 45 dB PSRR at 100 kHz suppresses switching artifacts from adjacent DC/DC converters, preventing image noise and frame corruption. |
| Cluster Displays | Telematics Control Units |
|
Use Scenario: Delivering stable 5.0 V to TFT LCD timing controllers and touch controller ASICs in digital instrument clusters. IC Role / Device Role / Timing Role: Fixed-output LDO with EN/PG sequencing for synchronized power-up of display subsystem and MCU. Use Value: 200–650 µs startup time and precise PG threshold (92% VOUT) enable deterministic boot timing for ASIL-B cluster firmware execution. |
Use Scenario: Supplying 5.0 V to cellular modem baseband, GNSS receiver, and CAN transceiver in vehicle connectivity gateways. IC Role / Device Role / Timing Role: Low-IQ (25 µA) LDO supporting always-on LTE/Wi-Fi wake-up circuitry with controlled power sequencing. Use Value: 1.5 µA shutdown current minimizes parasitic drain on 12 V battery during extended parking - critical for >10-year telematics module lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS74650PQWDRBRQ1 | Same 5.0 V fixed output, but adds adjustable PG delay (B-version timing option) and improved RθJA = 55.5°C/W in 3-mm × 3-mm VSON-8 package. | Better thermal performance suits higher ambient environments (e.g., under-hood telematics); larger footprint requires PCB redesign. | Select when thermal margin is constrained and board area allows 3-mm × 3-mm package; not pin-compatible with TPS74550PQWDRBRQ1. |
| TLV76750QWDRBRQ1 | 500-mA automotive LDO with 5.0 V fixed output, but lower PSRR (35 dB @ 100 kHz), no PG output, and higher dropout (220 mV @ 500 mA). | Lacks power-good signaling - unsuitable for systems requiring coordinated power sequencing or fault detection. | Choose only for cost-sensitive, non-sequenced applications where PG functionality is omitted and PSRR >40 dB is not required. |
Compared with TPS74550PQWDRBRQ1, TPS74650PQWDRBRQ1 offers superior thermal management in larger packages, while TLV76750QWDRBRQ1 trades PG functionality and PSRR for lower BOM cost - neither is pin-compatible, requiring layout changes.
Availability
TPS74550PQWDRBRQ1 is available at Aetrix Electronics and suitable for automotive head units, front/rear ADAS cameras, and cluster displays requiring stable component supply with full AEC-Q100 compliance and traceable sourcing.
Supply support for TPS74550PQWDRBRQ1 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 automotive qualification expertise and broad functional safety infrastructure.
The TPS745-Q1 product line delivers ultra-low-dropout regulators with integrated power-good and wettable-flank packaging specifically for automotive infotainment, ADAS, and telematics power domains demanding AEC-Q100 Grade 1 reliability.
FAQ
What is the output voltage tolerance of the TPS74550PQWDRBRQ1 over temperature?
The TPS74550PQWDRBRQ1 maintains ±0.85% output accuracy at 25°C and ±1.5% maximum over the full operating junction temperature range of –40°C to +150°C. This specification applies to the fixed 5.0 V output version and is verified per AEC-Q100 test conditions with VIN = VOUT(NOM) + 0.5 V and IOUT = 1 mA. The TPS74550PQWDRBRQ1 achieves this using a precision band-gap reference and trimmed error amplifier.
Does the TPS74550PQWDRBRQ1 require an external pull-up resistor on the PG pin?
Yes, the TPS74550PQWDRBRQ1 uses an open-drain power-good (PG) output by default, requiring an external pull-up resistor to a valid logic supply (e.g., 3.3 V or 5.0 V). The datasheet specifies no internal pull-up; omission causes PG to remain floating and non-functional. Push-pull PG is not supported in the TPS74550PQWDRBRQ1 variant - only in select adjustable versions with VOUT ≥ 1.0 V.
Can the TPS74550PQWDRBRQ1 operate with less than 1 µF output capacitance?
No - the TPS74550PQWDRBRQ1 requires a minimum of 1 µF ceramic output capacitor for guaranteed stability, as specified in the Recommended Operating Conditions table. Using less capacitance risks oscillation, poor transient response, and potential system reset due to output voltage collapse under load steps. The 1 µF value is the minimum derated capacitance; actual capacitor must meet this at operating bias and temperature.
What is the thermal resistance (RθJA) of the TPS74550PQWDRBRQ1 package?
The TPS74550PQWDRBRQ1 uses the 6-pin WSON package (DRV) with a junction-to-ambient thermal resistance (RθJA) of 80.3°C/W, measured on a standard 2-layer JEDEC PCB with 1-in² copper pad. This value assumes proper thermal pad soldering to the GND plane. Higher ambient temperatures or reduced copper area will increase effective RθJA, requiring derating of maximum output current per thermal calculations.
Is the TPS74550PQWDRBRQ1 pin-compatible with other devices in the TPS745-Q1 family?
No - the TPS74550PQWDRBRQ1 (WSON-6, fixed 5.0 V) is not pin-compatible with TPS745-Q1 variants in VSON-8 (e.g., DRB) or adjustable WSON-6 packages. Pin count, pin functions (e.g., FB presence), and package dimensions differ. For example, the DRB 8-pin variant includes NC pins and different PG/EN placement. Migration requires PCB layout revision and schematic update.
TPS74550PQWDRBRQ1 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):
- 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.16V @ 500mA
- Current - Output:
- 500mA
- 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)
TPS74550PQWDRBRQ1 FAQ
1.How can I place an order for TPS74550PQWDRBRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS74550PQWDRBRQ1 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 TPS74550PQWDRBRQ1 reliable?
The price and inventory of TPS74550PQWDRBRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS74550PQWDRBRQ1 is usually 5 days.
3.What payment methods are accepted for TPS74550PQWDRBRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS74550PQWDRBRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS74550PQWDRBRQ1?
TPS74550PQWDRBRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS74550PQWDRBRQ1 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 TPS74550PQWDRBRQ1?
For technical support, including TPS74550PQWDRBRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS74550PQWDRBRQ1 requirements.
6.How does Aetrix verify that TPS74550PQWDRBRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS74550PQWDRBRQ1 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 TPS74550PQWDRBRQ1 meets industry standards.
7.What is the process for return or replacement of TPS74550PQWDRBRQ1?
All TPS74550PQWDRBRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS74550PQWDRBRQ1, 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 TPS74550PQWDRBRQ1 part is unused and in its original packaging.
Return procedure for TPS74550PQWDRBRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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