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Texas Instruments TPS628122AQWRWYRQ1
- Part No.:
- TPS628122AQWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS628122AQWRWYRQ1.pdf
- Description:
- IC REG BUCK 1.2V 2A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,959
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Product details
Overview
TPS628122AQWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive synchronous step-down DC/DC converter delivering 2 A continuous output current, fixed 1.2 V output voltage, and ±1% feedback voltage accuracy in PWM mode. It operates from 2.75 V to 6 V input, supports adjustable switching frequency from 1.8 MHz to 4 MHz, and features active output discharge, power-good monitoring, and spread-spectrum clocking for EMI reduction - deployed in infotainment head units and ADAS sensor fusion ECUs.
For engineers reviewing the TPS628122AQWRWYRQ1 datasheet, TPS628122AQWRWYRQ1 pinout, TPS628122AQWRWYRQ1 application, or TPS628122AQWRWYRQ1 equivalent, key selection criteria include its fixed 1.2 V output, wettable-flank VQFN-9 (RWY) package, forced-PWM/PFM mode control via MODE/SYNC, precise ENABLE threshold (1.06–1.15 V), and integrated soft-start/tracking via SS/TR pin.
Technical Context
The TPS628122AQWRWYRQ1 implements peak current mode control with internally compensated loop architecture and three selectable compensation settings tied to COMP/FSET resistor value - enabling stable regulation across 15 µF to 470 µF output capacitance ranges. Its dual-mode operation (PFM at light load, forced PWM at full load) sustains >90% efficiency from 1 mA to 2 A output current under 4.0 V input.
Switching frequency is set either by a resistor from COMP/FSET to GND (1.8–4 MHz), or fixed at 2.25 MHz when COMP/FSET is tied to VIN/GND. External synchronization is supported on MODE/SYNC pin (1.8–4 MHz range) only when COMP/FSET uses a resistor - not when tied directly to rail. The device integrates low-RDS(on) high-side (37–60 mΩ) and low-side (15–35 mΩ) MOSFETs optimized for high ambient temperature operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A continuous - supports high-power microcontrollers and SoCs in automotive clusters without thermal derating up to +125°C ambient. |
| Output Voltage | Fixed 1.2 V - eliminates external feedback resistors; matches core voltage requirements of ARM Cortex-A/R processors and FPGA I/O banks. |
| Input Voltage Range | 2.75 V to 6 V - compatible with 3.3 V, 5 V, and battery-backed automotive rails including cold-crank (down to 2.75 V). |
| Feedback Accuracy | ±1% in PWM mode - ensures tight regulation for noise-sensitive analog subsystems and high-speed SerDes interfaces. |
| Quiescent Current | 15 µA typical - enables always-on functionality in telematics modules while minimizing standby power loss. |
| Switching Frequency | Adjustable 1.8–4 MHz - allows EMI optimization and inductor size reduction; supports external sync for multi-rail phase alignment. |
| Package | VQFN-9 (RWY), 3.0 mm × 2.0 mm with wettable flanks - enables automated optical inspection (AOI) and reliable solder joint formation in automotive reflow profiles. |
Pinout & Package
VQFN-9 (RWY) package: 3.0 mm × 2.0 mm body, 0.4 mm pitch, wettable flanks, exposed thermal pad (GND-connected). Pin 1 marked by dot; bottom view orientation per Figure 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN (Pin 8) | Enable control input | Logic-high enable with 1.06–1.15 V rising threshold; supports programmable UVLO and power sequencing via external resistor divider. |
| FB (Pin 5) | Feedback reference input | Internally connected to 1.2 V reference; must be shorted to output for fixed-VOUT operation - no external resistor network required. |
| GND (Pin 4) | Power and signal ground | Primary return path for power switches, control circuitry, and thermal pad; requires low-inductance PCB connection to minimize noise coupling. |
| MODE/SYNC (Pin 1) | Operation mode / sync input | Pull-low for PFM/PWM auto-mode; pull-high for forced PWM; accepts external 1.8–4 MHz clock for synchronized multi-converter systems. |
| COMP/FSET (Pin 7) | Compensation & frequency set | Resistor-to-GND sets both switching frequency (1.8–4 MHz) and internal compensation; tied to VIN/GND for fixed 2.25 MHz operation. |
| PG (Pin 9) | Open-drain power-good output | Asserts high-Z when VOUT is within ±5% of target (95–107% window); used for system reset coordination and supply sequencing. |
| SS/TR (Pin 6) | Soft-start / tracking input | Capacitor-to-GND sets startup ramp time; accepts external voltage for output tracking during rail sequencing - critical for multi-supply SoC boot. |
| SW (Pin 3) | Switch node | Connection point for external inductor; carries high di/dt switching waveform - requires tight layout with minimal loop area to reduce EMI. |
| VIN (Pin 2) | Input power supply | Accepts 2.75–6 V; requires local 5–10 µF ceramic capacitor placed adjacent to pin to suppress high-frequency input ripple. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - meets automotive power supply reliability requirements for engine bay and cabin electronics. |
| Active output discharge | 50 Ω internal discharge path - ensures rapid VOUT collapse during shutdown, preventing back-powering of downstream logic and meeting ISO 16750-2 transient immunity. |
| Spread-spectrum clocking (SSC) | Enabled via pin strap on TPS628122AQWRWYRQ1 - reduces peak EMI by >10 dB across 100 kHz–1 GHz band, easing CISPR 25 Class 5 compliance. |
| Precise ENABLE threshold | Rising edge at 1.06–1.15 V, falling edge at 0.96–1.05 V - enables accurate undervoltage lockout and controlled power-up sequencing with RC networks. |
| 100% duty cycle capability | Supports dropout operation down to VOUT = VIN − 0.1 V - maintains regulation during cold-crank events where input dips to 2.75 V while supplying 1.2 V. |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
|
Use Scenario: Powering application processor (e.g., NXP i.MX8), display interface, and audio codec in centralized vehicle infotainment system. IC Role / Device Role: Primary 1.2 V core supply for SoC, replacing discrete LDO+switcher solutions with higher efficiency and smaller footprint. Use Value: Delivers 2 A at >92% efficiency across 10 mA–2 A load range, reducing thermal load in sealed head unit enclosures and enabling fanless design. |
Use Scenario: Supplying configurable instrument cluster MCU, graphics controller, and touch controller requiring tightly sequenced 1.2 V and 3.3 V rails. IC Role / Device Role: Fixed 1.2 V rail generator with SS/TR pin enabling voltage tracking to match 3.3 V rail ramp rate during cold start. Use Value: Eliminates need for external tracking IC; PG output coordinates reset assertion with other supplies, ensuring deterministic boot sequence. |
| Telematics Control Unit | Surround View ECU |
|
Use Scenario: Powering LTE/C-V2X modem, GNSS receiver, and secure element in always-on telematics gateway with strict quiescent current budget. IC Role / Device Role: Always-on 1.2 V supply operating in PFM mode at µA loads, transitioning seamlessly to PWM at burst transmit currents. Use Value: 15 µA IQ enables <10 µA system standby current; SSC minimizes conducted emissions on CAN/FlexRay bus lines near RF sections. |
Use Scenario: Providing 1.2 V core power to multi-camera image signal processor (ISP) in surround-view processing ECU with thermal constraints. IC Role / Device Role: High-current, high-temperature-stable buck converter with low RDS(on) FETs and wettable-flank package for reflow reliability. Use Value: Sustains 2 A output at +105°C ambient without derating; thermal resistance RθJB = 16.4°C/W enables direct PCB copper pour cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS6281206QWRWYRQ1 | Same 2 A rating and RWY package, but fixed 1.0 V output and no spread-spectrum clocking. | Suitable for lower-voltage core domains (e.g., memory I/O), but lacks EMI reduction for RF-dense modules like telematics. | Select when 1.0 V is required and EMI margin is sufficient; not drop-in for 1.2 V systems. |
| TPS628130AQWRWYRQ1 | 3 A output, same 1.2 V fixed output and SSC support, but larger thermal footprint (RθJA = 65.2°C/W vs 71.1°C/W). | Provides headroom for future-proofing or higher transient loads, but occupies identical PCB area and requires updated thermal validation. | Choose for designs anticipating >2 A peak loads or needing margin against aging/derating; shares pinout and control interface. |
Compared with TPS628122AQWRWYRQ1, TPS6281206QWRWYRQ1 offers lower output voltage without EMI mitigation, while TPS628130AQWRWYRQ1 delivers higher current with identical control features and package compatibility - enabling scalable power architecture across vehicle platforms.
Availability
TPS628122AQWRWYRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and telematics gateways requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.
Supply support for TPS628122AQWRWYRQ1 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 power management ICs, with decades of automotive qualification expertise and functional safety documentation support.
The TPS6281x-Q1 product line is designed specifically for automotive power rails in infotainment, digital clusters, and ADAS systems - emphasizing high efficiency across wide load ranges, robust thermal performance, and integrated features for system-level reliability and EMI compliance.
FAQ
What is the output voltage tolerance of the TPS628122AQWRWYRQ1 in PWM mode?
The TPS628122AQWRWYRQ1 guarantees ±1% feedback voltage accuracy in PWM mode over temperature (–40°C to +125°C) and input voltage (VIN ≥ VOUT + 1 V). This translates to ±12 mV absolute tolerance on its fixed 1.2 V output, ensuring stable core voltage for automotive-grade processors without external trimming.
Does the TPS628122AQWRWYRQ1 support external synchronization, and what are the requirements?
Yes, the TPS628122AQWRWYRQ1 supports external synchronization on the MODE/SYNC pin across 1.8–4 MHz, but only when COMP/FSET is configured with a resistor to GND - not when tied directly to VIN or GND. The sync signal must be a clean CMOS-level square wave with 20–80% duty cycle; lock time is typically 50 µs.
How does the SS/TR pin function in the TPS628122AQWRWYRQ1, and can it be left unconnected?
The SS/TR pin on the TPS628122AQWRWYRQ1 serves dual roles: capacitor-to-GND sets soft-start ramp time, and external voltage injection enables output tracking. It must never be left floating - connect to GND for immediate startup or use a resistor divider for sequencing. Leaving it unconnected risks erratic enable behavior and violates recommended operating conditions.
What is the thermal performance of the TPS628122AQWRWYRQ1 in a standard 2-layer PCB layout?
In a standard 2-layer PCB with 1 oz copper and 10 cm² thermal pad copper pour, the TPS628122AQWRWYRQ1 achieves RθJB = 16.4°C/W. At 2 A load and 5 V input, junction temperature rise is ~52°C above board temperature - well within the +150°C max TJ limit even at +100°C ambient, assuming proper GND plane connectivity.
Is spread-spectrum clocking enabled by default on the TPS628122AQWRWYRQ1, and how is it controlled?
Yes, spread-spectrum clocking is factory-enabled on the TPS628122AQWRWYRQ1 and requires no external configuration. It operates automatically in PWM mode across the full 1.8–4 MHz frequency range, modulating center frequency by ±1% at 30 kHz rate to reduce narrowband EMI peaks - verified per CISPR 25 test setups in TI's automotive reference designs.
TPS628122AQWRWYRQ1 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):
- 1.2V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 1.8MHz ~ 4MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 9-VQFN-HR (3x2)
TPS628122AQWRWYRQ1 FAQ
1.How can I place an order for TPS628122AQWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628122AQWRWYRQ1 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 TPS628122AQWRWYRQ1 reliable?
The price and inventory of TPS628122AQWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628122AQWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS628122AQWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628122AQWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628122AQWRWYRQ1?
TPS628122AQWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628122AQWRWYRQ1 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 TPS628122AQWRWYRQ1?
For technical support, including TPS628122AQWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628122AQWRWYRQ1 requirements.
6.How does Aetrix verify that TPS628122AQWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS628122AQWRWYRQ1 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 TPS628122AQWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS628122AQWRWYRQ1?
All TPS628122AQWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS628122AQWRWYRQ1, 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 TPS628122AQWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS628122AQWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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