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Texas Instruments TPS628112AQWRWYRQ1
- Part No.:
- TPS628112AQWRWYRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 9-VFQFN
- Datasheet:
-
TPS628112AQWRWYRQ1.pdf
- Description:
- IC REG BUCK 1.2V 1A 9VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,995
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Product details
Overview
TPS628112AQWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering 1 A continuous output current, with fixed 1.2 V output voltage, 2.75 V to 6 V input range, ±1% output voltage accuracy in PWM mode, and adjustable switching frequency from 1.8 MHz to 4 MHz. It supports forced PWM or PFM operation and integrates active output discharge for controlled power-down in infotainment head units.
For engineers reviewing the TPS628112AQWRWYRQ1 datasheet, TPS628112AQWRWYRQ1 pinout, TPS628112AQWRWYRQ1 application, or TPS628112AQWRWYRQ1 equivalent, key selection criteria include its wettable-flank VQFN-9 package, spread-spectrum clocking option, precise enable threshold for sequencing, power-good window comparator, and 100% duty cycle capability for low-dropout operation.
Technical Context
The TPS628112AQWRWYRQ1 implements peak current mode control with internal compensation selectable via resistor on COMP/FSET, enabling stable regulation across 15 µF–130 µF output capacitance ranges. Its MODE/SYNC pin supports external clock synchronization (1.8–4 MHz) or logic-controlled PWM/PFM mode selection.
It features a dedicated SS/TR pin for soft-start timing or voltage tracking, a precision EN input with 1.1 V rising threshold for programmable UVLO and rail sequencing, and a PG open-drain output with 92–98% rising and 87–93% falling thresholds relative to FB voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 1 A continuous - supports compact power rails in space-constrained automotive ECUs without derating at +125°C ambient. |
| Output Voltage | Fixed 1.2 V - eliminates external feedback resistors, reduces BOM count, and ensures consistent core supply for SoCs/FPGAs. |
| Input Voltage Range | 2.75 V to 6 V - compatible with 3.3 V, 5 V, and battery-backed automotive supplies including cold-crank transients down to 2.75 V. |
| Switching Frequency | 1.8 MHz to 4 MHz - enables use of small 0.25–0.47 µH inductors and ceramic capacitors while avoiding AM radio band interference. |
| Quiescent Current | 15 µA typical - maintains ultra-low standby power in always-on domains such as telematics wake-up circuits. |
| Output Accuracy | ±1% in PWM mode - guarantees tight regulation for noise-sensitive analog or high-speed digital loads without post-regulation. |
| Thermal Rating | Junction temp –40°C to +150°C - meets AEC-Q100 Grade 1 requirements for under-hood and dashboard-mounted modules. |
Pinout & Package
The TPS628112AQWRWYRQ1 is housed in a 3.0 mm × 2.0 mm VQFN-9 package with wettable flanks (RWY), optimized for automated optical inspection (AOI) and high-reliability solder joint formation in automotive PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| MODE/SYNC | Digital control input | Selects PWM-only (high) or auto PFM/PWM (low); also accepts external sync clock (1.8–4 MHz) when COMP/FSET has R-to-GND. |
| SW | Power switch node | Connects to external inductor; carries high di/dt switching current - requires tight layout with minimal loop area. |
| FB | Feedback reference | Internally tied to 1.2 V - must be connected directly to output for fixed-voltage operation; no external divider needed. |
| VIN | Main power input | Accepts 2.75–6 V; requires local 10 µF ceramic capacitor placed adjacent to pin and GND for EMI suppression. |
| GND | Power and signal ground | Common return for VIN, SW, and internal circuitry; must be connected to solid thermal pad under package body. |
| EN | Enable control | Logic-compatible input with 1.1 V rising threshold - enables precise sequencing and user-defined undervoltage lockout via resistor divider. |
| PG | Power-good indicator | Open-drain output asserting high impedance when VOUT is within ±5% of 1.2 V (92–98% rising, 87–93% falling window). |
| SS/TR | Soft-start/tracking | Capacitor-to-GND sets startup ramp time; can track external voltage source for coordinated rail sequencing. |
| COMP/FSET | Compensation & frequency set | Resistor-to-GND selects both control-loop compensation and switching frequency; tied to GND/VIN fixes fS = 2.25 MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Active Output Discharge | 50 Ω internal discharge path - ensures rapid, controlled VOUT collapse during shutdown to prevent latch-up in downstream logic. |
| Spread Spectrum Clocking | Optional modulation - reduces peak EMI by spreading fundamental switching energy across 1.8–4 MHz band, easing CISPR 25 Class 5 compliance. |
| 100% Duty Cycle Mode | Supports dropout < 100 mV - enables regulation down to VIN – 0.1 V, critical for battery-fallback operation in ADAS sensors. |
| Wettable Flank Package | RWY (VQFN-9) - enables AOI-capable solder joint inspection, improving field reliability in automotive production environments. |
| Functional Safety Documentation | Available FIT data, FMEA reports, and safety analysis support - accelerates ISO 26262 ASIL-B system-level certification. |
Applications
| Infotainment Head Unit | Hybrid Reconfigurable Cluster |
|---|---|
Use Scenario: Powering application processor cores and GPU subsystems requiring stable 1.2 V at up to 1 A with fast transient response. IC Role / Device Role / Timing Role: Primary core voltage regulator with precise enable sequencing and power-good monitoring for safe boot initialization. Use Value: ±1% output accuracy and 15 µA quiescent current ensure reliable low-power operation and meet stringent thermal limits inside sealed dash displays. | Use Scenario: Supplying configurable display driver ICs and microcontrollers in digital instrument clusters with dynamic backlight and HUD integration. IC Role / Device Role / Timing Role: Fixed-output buck converter providing clean 1.2 V rail synchronized to system power-up sequence via SS/TR pin. Use Value: Active output discharge prevents floating voltage during sleep/wake transitions, eliminating display ghosting and memory corruption. |
| Telematics Control Unit | Surround View ECU |
Use Scenario: Delivering always-on 1.2 V supply to cellular modem baseband processors and GNSS receivers in parked-mode operation. IC Role / Device Role / Timing Role: Low-IQ DC/DC regulator with precise EN threshold enabling controlled wake-from-sleep based on CAN bus activity. Use Value: 15 µA quiescent current extends battery life during extended parking; AEC-Q100 Grade 1 rating ensures operation at –40°C to +125°C ambient. | Use Scenario: Powering image signal processors (ISPs) and SerDes interfaces in multi-camera surround-view systems with strict EMI limits. IC Role / Device Role / Timing Role: EMI-optimized buck converter using spread-spectrum clocking and 2.25 MHz fixed frequency to avoid interference with video clock harmonics. Use Value: Wettable-flank VQFN-9 package and 1.8–4 MHz frequency agility simplify layout and help pass CISPR 25 radiated emissions testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS628110AQWRWYRQ1 | Fixed 1.2 V output, no spread-spectrum clocking, same 1 A rating and RWY package. | Lacks SSC feature - suitable where EMI is managed externally or less critical. | Choose when SSC is unnecessary and cost optimization is prioritized over EMI margin. |
| TPS628122AQWRWYRQ1 | 2 A output, fixed 1.2 V, identical pinout and features including SSC and wettable flanks. | Higher current capability - fits designs with future-proofing or higher load margins. | Choose when >1 A peak load is expected or dual-rail redundancy is required. |
Compared with TPS628110AQWRWYRQ1, the TPS628112AQWRWYRQ1 adds spread-spectrum clocking for improved EMI performance without layout changes; compared with TPS628122AQWRWYRQ1, it offers lower cost and thermal footprint for 1 A applications where headroom is not required.
Availability
TPS628112AQWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, hybrid reconfigurable clusters, and telematics control units requiring stable component supply, AEC-Q100 qualification, and functional safety documentation support.
Supply support for TPS628112AQWRWYRQ1 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 solutions with decades of automotive qualification experience.
The TPS6281x-Q1 product line delivers high-efficiency, small-footprint synchronous buck converters designed specifically for demanding automotive infotainment and ADAS applications requiring AEC-Q100 Grade 1 operation and functional safety readiness.
FAQ
What is the output voltage configuration of the TPS628112AQWRWYRQ1?
The TPS628112AQWRWYRQ1 provides a fixed 1.2 V output voltage. Its FB pin is internally connected to the 1.2 V reference, so no external feedback resistors are required. This simplifies design, improves accuracy, and reduces component count compared to adjustable versions like the TPS62811QWRWYRQ1. The ±1% output voltage accuracy is guaranteed in PWM mode across temperature and line/load conditions.
Does the TPS628112AQWRWYRQ1 support external clock synchronization?
Yes, the TPS628112AQWRWYRQ1 supports external clock synchronization via its MODE/SYNC pin, accepting input frequencies from 1.8 MHz to 4 MHz. However, this requires a resistor connected from the COMP/FSET pin to GND to enable PLL-based synchronization. If COMP/FSET is tied directly to GND or VIN (setting fixed 2.25 MHz), external sync is disabled. Synchronization helps reduce beat frequencies in multi-rail systems and eases EMI filtering.
What package type and mounting features does the TPS628112AQWRWYRQ1 use?
The TPS628112AQWRWYRQ1 uses the RWY package: a 3.0 mm × 2.0 mm, 9-pin VQFN with wettable flanks. This package enables automated optical inspection (AOI) of solder joints - a critical requirement for automotive manufacturing quality control. The exposed thermal pad on the bottom enhances heat dissipation, supporting 1 A operation at +125°C ambient without derating.
How does the TPS628112AQWRWYRQ1 handle power sequencing and startup control?
The TPS628112AQWRWYRQ1 supports precise power sequencing through three integrated features: (1) a programmable EN pin with 1.1 V rising threshold for custom UVLO, (2) an SS/TR pin that accepts an external capacitor to set soft-start ramp time or tracks another voltage rail, and (3) a PG output with window-comparator logic (92–98% rising, 87–93% falling) to signal valid regulation. These allow deterministic, glitch-free startup in multi-rail automotive systems.
Is spread-spectrum clocking enabled by default on the TPS628112AQWRWYRQ1?
No, spread-spectrum clocking (SSC) is optional and disabled by default on the TPS628112AQWRWYRQ1. It must be enabled by connecting a specific resistor network between the MODE/SYNC and GND pins, as defined in the datasheet. When activated, SSC modulates the switching frequency to reduce peak EMI amplitude - a key advantage for passing CISPR 25 Class 5 emissions tests in automotive modules without adding shielding or filters.
TPS628112AQWRWYRQ1 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:
- 1A
- 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)
TPS628112AQWRWYRQ1 FAQ
1.How can I place an order for TPS628112AQWRWYRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS628112AQWRWYRQ1 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 TPS628112AQWRWYRQ1 reliable?
The price and inventory of TPS628112AQWRWYRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS628112AQWRWYRQ1 is usually 5 days.
3.What payment methods are accepted for TPS628112AQWRWYRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS628112AQWRWYRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS628112AQWRWYRQ1?
TPS628112AQWRWYRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS628112AQWRWYRQ1 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 TPS628112AQWRWYRQ1?
For technical support, including TPS628112AQWRWYRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS628112AQWRWYRQ1 requirements.
6.How does Aetrix verify that TPS628112AQWRWYRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS628112AQWRWYRQ1 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 TPS628112AQWRWYRQ1 meets industry standards.
7.What is the process for return or replacement of TPS628112AQWRWYRQ1?
All TPS628112AQWRWYRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS628112AQWRWYRQ1, 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 TPS628112AQWRWYRQ1 part is unused and in its original packaging.
Return procedure for TPS628112AQWRWYRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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