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Texas Instruments TPS628120MQWRWYRQ1
- Part No.:
- TPS628120MQWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS628120MQWRWYRQ1.pdf
- Description:
- IC REG BUCK 1.8V 2A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,474
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Product details
Overview
TPS628120MQWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 2 A continuous output current, with input voltage range 2.75 V to 6 V, fixed 1.8 V output, ±1% feedback voltage accuracy in PWM mode, and adjustable switching frequency from 1.8 MHz to 4 MHz. It serves as a primary power rail regulator in ADAS sensor fusion ECUs and infotainment head units.
For engineers reviewing the TPS628120MQWRWYRQ1 datasheet, TPS628120MQWRWYRQ1 pinout, TPS628120MQWRWYRQ1 application, or TPS628120MQWRWYRQ1 equivalent, key selection considerations include its wettable-flank VQFN-9 package, active output discharge, precise ENABLE threshold for sequencing, forced-PWM/PFM mode control via MODE/SYNC, and integrated spread-spectrum clocking option.
Technical Context
The TPS628120MQWRWYRQ1 implements peak current mode control with internal loop compensation selectable via resistor on COMP/FSET, enabling stable operation across 15 µF–130 µF output capacitance ranges depending on VOUT and compensation setting. Its 1.8–4 MHz switching frequency supports compact filter design while maintaining >90% efficiency at 2 A load with VIN = 5 V and VOUT = 1.8 V.
Functional safety support includes documentation for ISO 26262 ASIL-B system integration, thermal shutdown at 170°C with 15°C hysteresis, and precise EN pin thresholds (VIH = 1.1 V, VIL = 1.0 V) enabling programmable UVLO and exact power-rail sequencing. The device operates from –40°C to +125°C ambient and supports 100% duty cycle for low-dropout operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A continuous - supports high-current rails in telematics and cluster systems without external current boosting |
| Output Voltage | Fixed 1.8 V - eliminates external feedback resistors, reduces BOM count and layout area |
| Input Voltage Range | 2.75 V to 6 V - compatible with 3.3 V, 5 V, and automotive battery-supplied rails including cold-crank transients |
| Quiescent Current | 15 µA typical - enables ultra-low-power standby modes in always-on vehicle subsystems |
| Switching Frequency | 1.8 MHz to 4 MHz adjustable - allows EMI optimization and inductor size reduction while avoiding AM band interference |
| Feedback Accuracy | ±1% in PWM mode - ensures tight regulation for noise-sensitive digital cores and SerDes interfaces |
| Thermal Shutdown | 170°C with 15°C hysteresis - protects against sustained overload or poor PCB thermal design in enclosed modules |
Pinout & Package
The TPS628120MQWRWYRQ1 is housed in a 3 mm × 2 mm VQFN package with wettable flanks (RWY, 9-pin), optimized for automated optical inspection and high-reliability automotive reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE/SYNC | Digital control input | Selects PFM/PWM auto-mode (low) or forced PWM (high); also accepts external sync clock 1.8–4 MHz |
| SW | Power switch node | Connects to internal high-side/low-side MOSFETs; requires low-inductance routing to minimize switching loss and EMI |
| FB | Feedback reference | Internally tied to 1.8 V - no external resistor divider needed; must be connected directly to output |
| VIN | Main power input | Accepts 2.75–6 V; requires local 10 µF ceramic capacitor placed adjacent to pin and GND |
| GND | Power ground | Primary return path for high-frequency switching current; must be solidly connected to thermal pad |
| EN | Enable control | Logic-level input with 1.1 V rising threshold - enables precise sequencing and user-defined UVLO via resistor divider |
| PG | Power-good indicator | Open-drain output asserting high when VOUT is within ±5% of 1.8 V; supports system monitoring and fault reporting |
| SS/TR | Soft-start/tracking | Capacitor-based ramp control for inrush limiting; also accepts external voltage for supply tracking during multi-rail startup |
| COMP/FSET | Compensation & frequency set | Resistor-to-GND sets both switching frequency and internal compensation - critical for stability with chosen output capacitance |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive power rail reliability requirements |
| Active output discharge | 50 Ω internal discharge path - ensures rapid VOUT decay during shutdown, preventing unintended logic states |
| Spread-spectrum clocking (SSC) | Optional modulation reduces peak EMI by spreading energy across 1.8–4 MHz band - simplifies EMC compliance |
| Power-good window comparator | Monitors VOUT at ±5% tolerance with 40 µs deglitch - provides robust system-level fault detection |
| Wettable-flank VQFN package | Facilitates AOI-compatible solder joint inspection - improves manufacturing yield and field reliability in automotive production |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
Use Scenario: Powers SoC core voltage rail (1.8 V) in multimedia head units with dual-display and audio DSP processing. IC Role / Device Role / Timing Role: Primary buck regulator supplying clean, tightly regulated 1.8 V to application processor I/O and memory interface blocks. Use Value: ±1% output accuracy maintains signal integrity for high-speed parallel buses; 2 A capability supports burst-mode CPU loads without droop. | Use Scenario: Supplies 1.8 V to microcontroller and graphics controller in digital instrument clusters with dynamic UI rendering. IC Role / Device Role / Timing Role: Fixed-output DC/DC converter delivering stable power to real-time display rendering subsystems. Use Value: Active discharge prevents ghosting during ignition-off transitions; soft-start ensures glitch-free cluster boot sequence. |
| Telematics Control Unit | Surround View ECU |
Use Scenario: Provides 1.8 V rail to LTE/C-V2X modem baseband ICs operating in thermally constrained enclosures. IC Role / Device Role / Timing Role: High-efficiency point-of-load regulator supporting always-on connectivity with ultra-low quiescent current. Use Value: 15 µA IQ extends battery backup runtime; thermal shutdown at 170°C prevents latch-up in sealed TCUs. | Use Scenario: Powers image signal processors (ISPs) and FPGA configuration logic in 4-camera surround-view systems. IC Role / Device Role / Timing Role: Fixed 1.8 V supply for ISP core logic and SerDes PHYs requiring low-noise, fast-transient response. Use Value: 1.8–4 MHz frequency adjustability avoids interference with camera pixel clocks; PG output enables ISP reset coordination. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628122AQWRWYRQ1 | Fixed 1.2 V output, same 2 A rating, identical package and pinout | Targets lower-voltage MCU cores instead of 1.8 V I/O or memory interfaces | Select when system requires 1.2 V rail with identical thermal and layout constraints |
| TPS628132MQWRWYRQ1 | 3 A output, fixed 1.8 V, same RWY package but higher current capability | Suitable for future-proofing or higher-load derivatives where 2 A margin is insufficient | Choose when additional headroom is needed for transient peaks or system scalability |
Compared with TPS628120MQWRWYRQ1, TPS628122AQWRWYRQ1 delivers identical performance at 1.2 V for core logic, while TPS628132MQWRWYRQ1 offers +1 A headroom for demanding ISPs or multi-core clusters-both retain pin compatibility and automotive qualification.
Availability
TPS628120MQWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, hybrid reconfigurable clusters, and surround-view ECUs requiring stable component supply under AEC-Q100 automotive qualification.
Supply support for TPS628120MQWRWYRQ1 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-grade power management ICs.
The TPS6281x-Q1 product line delivers high-efficiency, small-footprint synchronous buck converters designed specifically for automotive infotainment, ADAS, and telematics applications demanding AEC-Q100 qualification and functional safety support.
FAQ
What is the output voltage of the TPS628120MQWRWYRQ1 and how is it configured?
The TPS628120MQWRWYRQ1 provides a fixed 1.8 V output voltage. Unlike adjustable versions in the family, it does not require external feedback resistors - the FB pin is internally connected to the 1.8 V reference and must be directly tied to the output node. This configuration reduces component count, improves accuracy by eliminating resistor tolerance errors, and simplifies layout for space-constrained automotive modules. The ±1% feedback voltage accuracy is guaranteed in PWM mode across temperature and line conditions.
Does the TPS628120MQWRWYRQ1 support external synchronization of its switching frequency?
Yes, the TPS628120MQWRWYRQ1 supports external synchronization via the MODE/SYNC pin, accepting a clock signal from 1.8 MHz to 4 MHz. Synchronization is only enabled when a resistor is connected from COMP/FSET to GND - if COMP/FSET is tied directly to VIN or GND, external sync is disabled. The device locks to the external clock within 50 µs and aligns SW edge timing to maintain phase relationships in multi-converter systems. This capability helps reduce beat frequencies and system-level EMI in complex automotive power architectures.
What thermal protection features does the TPS628120MQWRWYRQ1 include?
The TPS628120MQWRWYRQ1 incorporates thermal shutdown that activates at 170°C junction temperature, with 15°C hysteresis to prevent oscillation near the trip point. It also features a low thermal resistance package: RθJA = 71.1°C/W and RθJB = 16.4°C/W, enabling reliable 2 A operation in ambient temperatures up to +125°C when mounted on a 2-layer PCB with adequate copper pour. The device's high-side and low-side MOSFETs have RDS(ON) values of 37 mΩ and 15 mΩ respectively at VIN ≥ 5 V, minimizing conduction losses and self-heating under full load.
How does the ENABLE pin function on the TPS628120MQWRWYRQ1?
The ENABLE pin on the TPS628120MQWRWYRQ1 has precise thresholds: VIH = 1.1 V (rising) and VIL = 1.0 V (falling), allowing accurate power sequencing and user-defined undervoltage lockout using a simple resistor divider. Pulling EN low disables the device, reducing shutdown current to 1.5 µA at 25°C. The pin must never be left floating - TI recommends pulling it high via a 100 kΩ resistor if unused. This precise enable behavior enables deterministic startup timing in multi-rail systems and supports fail-safe shutdown protocols required in ASIL-B designs.
Is spread-spectrum clocking available on the TPS628120MQWRWYRQ1 and how is it enabled?
Yes, spread-spectrum clocking (SSC) is an optional feature on the TPS628120MQWRWYRQ1 and is enabled by connecting a specific resistor value (4.5 kΩ to 10 kΩ) from the COMP/FSET pin to GND - this selects compensation setting 1 and activates SSC. When active, SSC modulates the switching frequency across the 1.8–4 MHz band to reduce peak EMI emissions by up to 10 dB, easing compliance with CISPR 25 Class 5 automotive EMC requirements. SSC is disabled when COMP/FSET is tied to VIN or GND, or when using higher-value resistors for other compensation settings.
TPS628120MQWRWYRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 9-VFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.75V
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 1.8MHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (3x2)
TPS628120MQWRWYRQ1 FAQ
1.How can I place an order for TPS628120MQWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628120MQWRWYRQ1 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 TPS628120MQWRWYRQ1 reliable?
The price and inventory of TPS628120MQWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628120MQWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS628120MQWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628120MQWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628120MQWRWYRQ1?
TPS628120MQWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628120MQWRWYRQ1 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 TPS628120MQWRWYRQ1?
For technical support, including TPS628120MQWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628120MQWRWYRQ1 requirements.
6.How does Aetrix verify that TPS628120MQWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS628120MQWRWYRQ1 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 TPS628120MQWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS628120MQWRWYRQ1?
All TPS628120MQWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS628120MQWRWYRQ1, 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 TPS628120MQWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS628120MQWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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