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Texas Instruments TPS65311QRVJRQ1
- Part No.:
- TPS65311QRVJRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
TPS65311QRVJRQ1.pdf
- Description:
- IC PWR MGMT UNIT AUTO 56VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,970
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Product details
Overview
TPS65311QRVJRQ1 from Texas Instruments is an automotive-grade power-management IC (PMIC) integrating one synchronous buck controller, two synchronous buck converters, one asynchronous boost converter, and one adjustable linear regulator. It delivers stable multi-rail outputs-including 5-V CAN supply-from 4 V to 40 V input with transient tolerance up to 60 V (80 V with external PMOS), operating across –40°C to +125°C ambient. Used in advanced driver-assistance systems (ADAS) for centralized DC power distribution.
For engineers reviewing the TPS65311QRVJRQ1 datasheet, TPS65311QRVJRQ1 pinout, TPS65311QRVJRQ1 application, or TPS65311QRVJRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, independent voltage monitoring per rail, SPI-based diagnostics, integrated window watchdog, and thermally enhanced 56-pin VQFN (RVJ) package with exposed thermal pad.
Technical Context
The TPS65311QRVJRQ1 implements a hierarchical power architecture: a high-voltage buck controller (BUCK1) operates at 490 kHz as pre-regulator, feeding two post-regulation synchronous buck converters (BUCK2/BUCK3) and one boost converter-all switching at 2.45 MHz for compact magnetics. Each regulator includes soft-start, independent UV/OV detection, and short-circuit/overcurrent/thermal protection.
Its digital interface comprises SPI (CSN/SCK/SDI/SDO), watchdog input (WD), reset outputs (RESN/PRESN), and interrupt signaling (IRQ), enabling real-time system health monitoring and MCU-controlled configuration. The integrated high-side driver supports LED warning lamps, while VT and VT_REF enable ambient temperature shutdown via external NTC.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4 V to 40 V continuous; withstands transients up to 60 V (80 V with external PMOS-FET) |
| Buck Controller (BUCK1) | Fixed 490-kHz frequency; peak gate-drive current 0.6 A; pseudo-random spread-spectrum or triangular mode |
| Synchronous Buck Converters (BUCK2/BUCK3) | 2.45-MHz switching; out-of-phase operation; 2-A output capability; internal loop compensation |
| Asynchronous Boost Converter | 2.45-MHz switching; 1-A integrated switch; adjustable output |
| Linear Regulator (LDO) | Adjustable 350-mA output; low-noise design for sensitive analog circuitry |
| Operating Temperature | AEC-Q100 Grade 1: –40°C to +125°C ambient; junction rated to 150°C |
| Digital Interface | SPI control & diagnostics; integrated window watchdog; independent voltage monitoring on all rails |
Pinout & Package
TPS65311QRVJRQ1 is housed in a thermally enhanced 56-pin VQFN (RVJ) package measuring 8.00 mm × 8.00 mm with exposed thermal pad for efficient heat dissipation in automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Main unprotected supply input | Powers RESET, WD, wake, SPI, temp sensing, voltage monitoring, and logic block |
| VINPROT | Main protected input supply | Supplies gate drivers and bandgap2; clamped to 60 V internally |
| VSSENSE | Battery line monitor input | Triggers undervoltage interrupt (IRQ) when battery drops below threshold |
| BOOT1–BOOT3 | Bootstrap capacitor terminals | Provide floating gate-drive voltage for high-side MOSFETs of BUCK1–BUCK3 |
| PH1–PH3, PH5 | Switching nodes | Connect to external inductors; define switching waveform for BUCK1/2/3 and BOOST |
| VSENSE1–VSENSE5 | Output voltage sense inputs | Enable closed-loop regulation via resistor divider feedback for each output rail |
| VMON1–VMON3 | Independent voltage monitor inputs | Support rail-specific UV/OV fault detection without relying on feedback path |
| CSN, SCK, SDI, SDO | SPI interface pins | Enable read/write access to internal registers for configuration and diagnostic reporting |
| WD, IRQ, RESN, PRESN | Watchdog & system control signals | WD accepts MCU watchdog pulses; IRQ asserts on fault; RESN/PRESN drive system resets |
| LDO_OUT | Linear regulator output | Provides low-noise, adjustable 350-mA supply-typically for ADC reference or I/O domain |
| VREF | Reference voltage output | Accurate 1.2-V (typ) output used as ADC reference for MCU/DSP peripherals |
| VT / VT_REF | Temperature shutdown interface | VT connects to external NTC; VT_REF supplies bias for comparator triggering shutdown at TA < –40°C |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM H1B and CDM C4B ESD robustness |
| Multi-rail independent monitoring | Hardware-level UV/OV detection on all five regulated outputs-no firmware dependency for safety-critical faults |
| Integrated window watchdog | Dedicated WD input accepts MCU pulses; configurable timeout prevents silent system lockup in ADAS |
| Thermally optimized packaging | 56-pin VQFN (RVJ) with exposed thermal pad achieves RθJA = 22.3°C/W for reliable high-power density layout |
| High-side LED driver | GU/GL outputs support external PMOS/FET for warning lamp control-reducing BOM count in dashboard modules |
| Flexible startup sequencing | Soft-start on all regulators minimizes inrush current; programmable enable timing via SPI register control |
Applications
| Advanced Driver-Assistance Systems (ADAS) | Automotive Infotainment Power Hub |
|---|---|
|
Use Scenario: Centralized power delivery for radar ECU, camera module, and sensor fusion processor requiring isolated, monitored 5-V, 3.3-V, and 1.2-V rails. IC Role / Device Role / Timing Role: PMIC provides pre- and post-regulated supplies with independent fault reporting and watchdog supervision for ASIL-B compliance. Use Value: Reduces board area by consolidating six discrete regulators; enables single-point diagnostics via SPI instead of multiple analog monitors. |
Use Scenario: Power management for head-unit SoC, display driver, audio codec, and USB-C PD interface in connected vehicle infotainment. IC Role / Device Role / Timing Role: Delivers tightly regulated 1.1-V core, 1.8-V I/O, 3.3-V peripheral, and 5-V USB supply with dynamic voltage scaling support. Use Value: 2.45-MHz BUCK2/BUCK3 switching allows use of 1.5-µH inductors-cutting solution size by >40% vs. 500-kHz alternatives. |
| Electric Power Steering (EPS) Control Unit | Automotive Gateway Module |
|
Use Scenario: Safety-critical EPS MCU, motor gate drivers, and position sensor interface needing redundant power paths and thermal shutdown. IC Role / Device Role / Timing Role: Supplies 5-V CAN transceiver, 3.3-V MCU, and 12-V gate driver bias; VT pin triggers shutdown if ambient falls below –40°C during cold start. Use Value: Integrated high-side driver replaces discrete PMOS + gate driver for status LED-reducing component count and failure modes. |
Use Scenario: Multi-protocol gateway (CAN FD, LIN, Ethernet PHY) requiring clean, low-noise 1.2-V, 2.5-V, and 3.3-V supplies with precise voltage monitoring. IC Role / Device Role / Timing Role: LDO_OUT powers ADC reference; VREF provides stable 1.2-V reference; VMONx inputs verify rail integrity before communication initialization. Use Value: Independent voltage monitoring per rail eliminates need for external supervisor IC-simplifying BOM and improving fault localization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65312QRVJRQ1 | Same pinout and feature set; differs only in factory-programmed default output voltages and SPI register map | Designed for identical ADAS/EPS use cases but with alternate voltage configurations (e.g., 3.3-V BUCK2 default) | Select when matching specific OEM voltage requirements without redesigning feedback networks |
| MAX20029ATP/V+T | 3-channel buck + LDO + boost; no integrated watchdog or SPI; lower integration (no high-side LED driver or VT shutdown) | Suitable for non-safety-critical body electronics where diagnostics and thermal shutdown are not required | Choose for cost-sensitive applications lacking ASIL-B requirements or needing simpler register interface |
Compared with TPS65311QRVJRQ1, TPS65312QRVJRQ1 offers drop-in compatibility with reconfigured defaults, while MAX20029ATP/V+T trades diagnostic depth and safety features for lower unit cost and reduced software overhead in less demanding domains.
Availability
TPS65311QRVJRQ1 is available at Aetrix Electronics and suitable for advanced driver-assistance systems (ADAS), electric power steering (EPS) control units, and automotive gateway modules requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant sourcing.
Supply support for TPS65311QRVJRQ1 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 company headquartered in Dallas, Texas, specializing in analog, embedded processing, and power management technologies for automotive, industrial, and communications markets.
The TPS65311-Q1 product line was engineered specifically for functional-safety-critical automotive applications-including ADAS and EPS-delivering integrated power regulation, real-time diagnostics, and hardware-enforced fault response without external supervision.
FAQ
What is the maximum input voltage rating for the TPS65311QRVJRQ1?
The TPS65311QRVJRQ1 supports continuous input voltage from 4 V to 40 V. Its VIN and VINPROT pins withstand transients up to 60 V, and with an external PMOS-FET connected to GPFET, it can tolerate up to 80 V. This makes the TPS65311QRVJRQ1 suitable for harsh automotive battery environments with load-dump and cold-crank conditions.
Does the TPS65311QRVJRQ1 support SPI-based configuration and diagnostics?
Yes, the TPS65311QRVJRQ1 includes a full SPI interface (CSN, SCK, SDI, SDO) for real-time register read/write access. Engineers use this interface to configure output voltages, adjust watchdog timeout, read fault flags (UV/OV/OC/thermal), and monitor rail status-enabling comprehensive system-level diagnostics without additional supervisory ICs.
How does the TPS65311QRVJRQ1 implement thermal shutdown for low-temperature operation?
The TPS65311QRVJRQ1 uses the VT pin to interface with an external NTC thermistor. When ambient temperature drops below –40°C, the VT comparator triggers device shutdown. VT_REF provides a stable reference for this function. This behavior is confirmed in the datasheet's "Shutdown Comparator" section and is part of the AEC-Q100 Grade 1 qualification for TPS65311QRVJRQ1.
What is the switching frequency of the BUCK2 and BUCK3 converters in the TPS65311QRVJRQ1?
The BUCK2 and BUCK3 synchronous buck converters in the TPS65311QRVJRQ1 operate at a fixed 2.45 MHz switching frequency. This high-frequency operation allows use of smaller inductors (e.g., 1.5 µH) and ceramic capacitors, reducing overall solution size and improving transient response-critical for space-constrained ADAS ECUs.
Is the TPS65311QRVJRQ1 pin-compatible with any other TI PMICs?
Yes, the TPS65311QRVJRQ1 shares identical pinout and package (56-pin VQFN RVJ) with the TPS65312QRVJRQ1. Both devices are functionally identical except for factory-programmed default output voltages and minor SPI register mapping differences-making them hardware-compatible drop-in alternatives for different voltage configurations.
TPS65311QRVJRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 56-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- -
- Current - Supply:
- 44µA
- Voltage - Supply:
- 4V ~ 50V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 56-VQFN (8x8)
TPS65311QRVJRQ1 FAQ
1.How can I place an order for TPS65311QRVJRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65311QRVJRQ1 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 TPS65311QRVJRQ1 reliable?
The price and inventory of TPS65311QRVJRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65311QRVJRQ1 is usually 5 days.
3.What payment methods are accepted for TPS65311QRVJRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65311QRVJRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65311QRVJRQ1?
TPS65311QRVJRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65311QRVJRQ1 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 TPS65311QRVJRQ1?
For technical support, including TPS65311QRVJRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65311QRVJRQ1 requirements.
6.How does Aetrix verify that TPS65311QRVJRQ1 is sourced from the original manufacturer or authorized distributors?
All TPS65311QRVJRQ1 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 TPS65311QRVJRQ1 meets industry standards.
7.What is the process for return or replacement of TPS65311QRVJRQ1?
All TPS65311QRVJRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS65311QRVJRQ1, 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 TPS65311QRVJRQ1 part is unused and in its original packaging.
Return procedure for TPS65311QRVJRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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