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Texas Instruments O31310QRWGRQ1
- Part No.:
- O31310QRWGRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 40-VFQFN Exposed Pad
- Datasheet:
-
O31310QRWGRQ1.pdf
- Description:
- AUTOMOTIVE HIGH VOLTAGE
- Quantity:
- Payment:
- Shipping:
Inventory:1,959
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Product details
Overview
TPS65313-Q1 from Texas Instruments is an AEC-Q100 Grade 1 automotive power-management IC (PMIC) integrating a wide-VIN synchronous buck preregulator (BUCK1, 4–36 V, up to 3.1 A), a low-voltage buck regulator (BUCK2, up to 2 A), and a 5-V boost converter (600 mA), all supporting ASIL-C functional safety compliance. It delivers precise voltage regulation for radar and camera ECUs with integrated PLL clocking (~2.2 MHz), SPI diagnostics, and watchdog supervision.
For engineers reviewing the TPS65313-Q1 datasheet, TPS65313-Q1 pinout, TPS65313-Q1 application, or TPS65313-Q1 equivalent, key selection considerations include its 40-pin VQFNP thermal package, factory-configurable output voltages (3.3/3.6 V BUCK1; 1.2/1.25/1.8/2.3 V BUCK2), 3-µA OFF-state quiescent current, independent voltage monitoring per rail, and support for modulated SYNC_IN clock input.
Technical Context
The TPS65313-Q1 implements three independent switching regulators with internal loop compensation and adaptive randomized spread-spectrum (ARSS) modulation to reduce EMI. BUCK1 supplies both BUCK2 and BOOST from a single wide-input rail, while each regulator features dedicated soft-start, overcurrent/overvoltage/thermal protection, and external sense inputs (VSENSE1–VSENSE3).
Its digital subsystem includes a Q&A windowed watchdog, reset supervisor with programmable NRES delay, MCU error signal monitor (MCU_ERR), and SPI interface (SDI/SDO/SCK/NCS) for real-time diagnostics and configuration. The integrated PLL supports synchronization to external clocks via SYNC_IN and generates a stable ~2.2 MHz switching frequency with ±1% accuracy when locked.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 36 V on VIN/AVIN/VIN_SAFE - enables direct battery connection in 12 V/24 V automotive systems without pre-regulation. |
| BUCK1 Output | Factory-set 3.3 V or 3.6 V, 3.1 A max - powers downstream rails and internal logic with <±1.7% DC accuracy. |
| BUCK2 Output | Factory-selectable 1.2 V / 1.25 V / 1.8 V / 2.3 V, 2 A max - supplies core logic or I/O domains of connected MCUs/DSPs. |
| BOOST Output | Fixed 5 V, 600 mA - provides isolated supply for USB PHYs, sensors, or analog circuitry requiring regulated 5 V. |
| Switching Frequency | ~2.2 MHz (PLL-derived), ±1% accuracy when synchronized - enables compact magnetics and reduces audible noise. |
| Quiescent Current | 3 µA in OFF state - minimizes battery drain during vehicle sleep modes (e.g., parking, key-off). |
| Functional Safety | ASIL-C (ISO 26262) and SIL-2 (IEC 61508) compliant - includes mandatory diagnostics (ABIST/LBIST), error latching, and fail-safe state controller. |
| Package | 40-pin VQFNP (RWG), 6.0 mm × 6.0 mm, 0.5-mm pitch - thermally enhanced with exposed thermal pad for >150°C junction operation. |
Pinout & Package
TPS65313-Q1 uses a thermally optimized 40-pin VQFNP (RWG) package with 0.5-mm pitch and an exposed thermal pad connected to system ground via multiple vias. Pin functions are validated per TI SLDS222C datasheet Figure 8-1 and Table 8-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary power input | Connects to automotive battery (4–36 V); powers BUCK1 and internal bias circuits. |
| PH1 / PH1A | BUCK1 switch node | High-frequency switching outputs driving external inductor; require low-inductance layout. |
| VSENSE1 | BUCK1 feedback input | Monitors regulated output voltage via resistor divider; enables precision regulation and fault detection. |
| VIO | Digital I/O supply | Provides 3–5.1 V supply for SPI interface and logic pins; decoupling critical for noise immunity. |
| NCS / SCK / SDI / SDO | SPI interface | Full-duplex serial control bus for register read/write, diagnostics, and configuration updates. |
| DIAG_OUT | Diagnostic multiplexer output | Analog/digital MUX output for monitoring internal voltages, temperatures, or status flags. |
| SYNC_IN | PLL reference clock input | Accepts external 2.2 MHz clock (±5%) for deterministic switching synchronization and EMI reduction. |
| NRES | Active-low reset output | Drives MCU reset line; programmable extension delay ensures proper power-up sequencing. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated ASIL-C safety architecture | Includes ABIST/LBIST, error latching, fail-safe state controller, and diagnostic registers - eliminates need for external safety monitors in Tier-1 radar modules. |
| Adaptive randomized spread spectrum (ARSS) | Reduces peak EMI by >10 dB across 150 kHz–1 GHz band - meets CISPR-25 Class 5 requirements without added shielding. |
| Independent per-rail voltage monitoring | Each regulator (BUCK1/BUCK2/BOOST) has dedicated UV/OV detection with configurable thresholds - enables granular fault isolation in multi-rail systems. |
| Thermally robust VQFNP package | RθJB = 6.8 °C/W enables 3.1 A continuous BUCK1 operation at 125°C ambient - supports under-hood deployment without forced air cooling. |
| Low-power OFF-state operation | 3 µA total quiescent current from VIN/AVIN/VIN_SAFE - extends battery life in always-on ADAS sensors during extended key-off periods. |
| Programmable watchdog & reset supervisor | Q&A windowed watchdog with configurable timeout and NRES delay - ensures deterministic recovery after MCU lockup in safety-critical vision processing chains. |
Applications
| Automotive Radar ECU | ADAS Camera Module |
|---|---|
Use Scenario: Front-facing long-range radar unit operating in engine bay with 12 V battery supply and ambient temperature up to +125°C. IC Role / Device Role / Timing Role: Primary PMIC supplying 3.3 V to radar SoC, 1.2 V to DSP core, and 5 V to RF front-end; PLL synchronizes switching to system clock to avoid beat frequencies. Use Value: Enables single-chip power solution meeting ASIL-C requirements while reducing board area by 40% vs. discrete regulators and safety monitors. | Use Scenario: Rear-view camera module mounted near exhaust with thermal cycling and vibration exposure. IC Role / Device Role / Timing Role: Power manager delivering 3.6 V to image sensor, 1.8 V to ISP, and 5 V to USB interface; WAKE pin detects ignition-on event for fast startup. Use Value: 3-µA OFF-state current prevents battery drain during vehicle storage; independent BUCK2 monitoring prevents ISP brownout during transient load spikes. |
| Industrial Radar Sensor | Factory Automation Controller |
Use Scenario: 24 V-powered millimeter-wave radar for material level sensing in dusty industrial enclosures. IC Role / Device Role / Timing Role: Wide-VIN PMIC powering FPGA, ADC, and RF transceiver; EXT_VSENSE1 monitors auxiliary 24 V supply health. Use Value: Factory-configurable BUCK1/BUCK2 voltages eliminate BOM variants; ARSS modulation suppresses EMI in electrically noisy plant environments. | Use Scenario: Programmable logic controller (PLC) I/O module requiring redundant 3.3 V and 5 V rails with fault logging. IC Role / Device Role / Timing Role: Central power hub managing power sequencing, reset coordination, and SPI-based diagnostics for fieldbus communication ICs. Use Value: Integrated watchdog and MCU_ERR pin enable closed-loop failure response; SPI-accessible safety registers simplify certification documentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65314-Q1 | Same pinout and feature set but with BUCK1 output fixed at 3.3 V only (no 3.6 V option); identical BUCK2/BOOST configurations. | Best suited for designs requiring only 3.3 V BUCK1 output and no voltage flexibility. | Select TPS65314-Q1 if BUCK1 voltage is fixed and cost optimization is prioritized over configurability. |
| MAX20029ATP/V+T | 3-channel automotive PMIC with 3.3 V/1.2 V/5 V outputs; lacks integrated PLL, SPI, or ASIL-C diagnostics; uses 32-pin TQFN. | Targeted at cost-sensitive non-safety-critical applications like infotainment power rails. | Choose MAX20029ATP/V+T only for non-ASIL systems where functional safety and clock synchronization are not required. |
Compared with TPS65313-Q1, TPS65314-Q1 offers identical safety and thermal performance but removes BUCK1 voltage selectability, while MAX20029ATP/V+T provides basic regulation without ASIL-C support or diagnostic interfaces - making TPS65313-Q1 the sole choice for radar/camera systems requiring certified functional safety and deterministic timing.
Availability
TPS65313-Q1 is available at Aetrix Electronics and suitable for automotive radar, ADAS camera, and industrial sensor applications requiring stable component supply, AEC-Q100 qualification, and long-term lifecycle assurance.
Supply support for TPS65313-Q1 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 experience in high-reliability power management solutions.
The TPS65313-Q1 belongs to TI's automotive functional-safety PMIC portfolio, designed specifically for radar, camera, and sensor-fusion ECUs needing integrated ASIL-C compliance, low quiescent current, and robust thermal performance in harsh environments.
FAQ
What is the maximum supported input voltage for TPS65313-Q1?
The TPS65313-Q1 supports an absolute maximum input voltage of 40 V on VIN, AVIN, and VIN_SAFE pins per its Absolute Maximum Ratings table. Its recommended operating range is 4 V to 36 V for BUCK1 operation, enabling compatibility with 12 V and 24 V automotive battery systems including cold-crank and load-dump transients.
Does TPS65313-Q1 support external clock synchronization?
Yes, TPS65313-Q1 supports external clock synchronization via the SYNC_IN pin, which accepts a 2.2 MHz ±5% clock signal to lock its internal PLL. When synchronized, the switching frequency accuracy improves to ±1%, and the device supports staircase dithering (±5% step) for enhanced EMI suppression in noise-sensitive radar applications.
How does the TPS65313-Q1 achieve ASIL-C compliance?
The TPS65313-Q1 achieves ASIL-C compliance through integrated hardware diagnostics including analog and logic built-in self-test (ABIST/LBIST), error latching, fail-safe state controller, programmable watchdog, and independent voltage/temperature monitoring per rail. All safety mechanisms are documented in TI's ISO 26262-certified functional safety manual for TPS65313-Q1.
What is the purpose of the EXT_VSENSE1 and EXT_VSENSE2 pins on TPS65313-Q1?
The EXT_VSENSE1 and EXT_VSENSE2 pins on TPS65313-Q1 are general-purpose analog voltage monitor inputs, each configurable via SPI to detect overvoltage or undervoltage conditions on external supplies (e.g., auxiliary 12 V rail or sensor bias voltage). They provide fault reporting through DIAG_OUT and SPI status registers, enhancing system-level monitoring capability.
Can TPS65313-Q1 operate with no external components on the VREG pin?
No, TPS65313-Q1 requires external decoupling on the VREG pin: a minimum 1-µF ceramic capacitor must be placed between VREG and PGND1/PGND1A to stabilize the internal gate driver supply. Omitting this capacitor risks unstable switching behavior and potential damage to high-side FETs in BUCK1/BUCK2/BOOST stages.
O31310QRWGRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 40-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- -
- Voltage - Supply:
- 4V ~ 36V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 40-VQFNP (6x6)
O31310QRWGRQ1 FAQ
1.How can I place an order for O31310QRWGRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for O31310QRWGRQ1 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 O31310QRWGRQ1 reliable?
The price and inventory of O31310QRWGRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for O31310QRWGRQ1 is usually 5 days.
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4.How is shipping managed for O31310QRWGRQ1?
O31310QRWGRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your O31310QRWGRQ1 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 O31310QRWGRQ1?
For technical support, including O31310QRWGRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your O31310QRWGRQ1 requirements.
6.How does Aetrix verify that O31310QRWGRQ1 is sourced from the original manufacturer or authorized distributors?
All O31310QRWGRQ1 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 O31310QRWGRQ1 meets industry standards.
7.What is the process for return or replacement of O31310QRWGRQ1?
All O31310QRWGRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with O31310QRWGRQ1, 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 O31310QRWGRQ1 part is unused and in its original packaging.
Return procedure for O31310QRWGRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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