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Texas Instruments TPS65941120RWERQ1
- Part No.:
- TPS65941120RWERQ1
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 56-VFQFN Exposed Pad
- Datasheet:
-
TPS65941120RWERQ1.pdf
- Description:
- AUTOMOTIVE 2.8-V TO 5.5-V, 5 BUC
- Quantity:
- Payment:
- Shipping:
Inventory:1,670
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Product details
Overview
TPS65941120RWERQ1 from Texas Instruments is an automotive-grade power management IC (PMIC) integrating five buck regulators (four 3.5 A multi-phase configurable, one 2 A), four LDOs (three 500 mA bypass-capable, one 300 mA low-noise), real-time clock, 32-kHz crystal oscillator, functional safety monitoring (ASIL-D hardware integrity), and dual I²C/SPI control interfaces - deployed in ADAS domain controllers and automotive digital clusters.
For engineers reviewing the TPS65941120RWERQ1 datasheet, TPS65941120RWERQ1 pinout, TPS65941120RWERQ1 application, or TPS65941120RWERQ1 equivalent, key selection criteria include ASIL-D compliance documentation, multi-phase BUCK current sharing configuration, RTC backup supply management, watchdog Q&A mode support, and VQFNP-56 thermal pad layout compatibility.
Technical Context
The TPS65941120RWERQ1 implements a safety-critical power architecture with independent voltage/over-current monitors on all five BUCK outputs and four LDO outputs, CRC-protected NVM for power sequencing, and dual error signal monitors (ESM) supporting level or PWM fault injection from MCU/SoC. Its watchdog supports both trigger-mode and question-and-answer (Q&A) communication over dedicated I²C2.
Power regulation includes flexible multi-phase operation across BUCK1–BUCK4 (up to 14 A aggregate), internal soft-start, 2.2/4.4 MHz switching with spread-spectrum modulation, and synchronized external clock input. The 32-kHz crystal oscillator feeds the RTC and supports buffered CLK32KOUT output via GPIO3/GPIO4/GPIO8.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3 V to 5.5 V - powers directly from automotive battery rail with integrated UVLO/OVP protection |
| Operating Temperature | −40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and cockpit applications |
| BUCK Output Current | Four 3.5 A BUCKs (configurable multi-phase), one 2 A BUCK - enables scalable core/SOC rail delivery with dynamic phase shedding |
| LDO Output Current | Three 500 mA LDOs (bypass-capable), one 300 mA low-noise LDO - supports noise-sensitive analog/RTC domains |
| Shutdown Current | 2 μA typical - meets ultra-low quiescent requirements for always-on vehicle subsystems |
| Functional Safety | Hardware integrity up to ASIL-D per ISO 26262 - includes register/NVM CRC, thermal warning/shutdown, and dual ESM inputs |
| Control Interface | SPI or dual I²C (I²C1 for config, I²C2 dedicated to Q&A watchdog) - enables secure, isolated safety monitoring |
| Package | VQFNP-56, 8 mm × 8 mm, 0.5 mm pitch with exposed thermal pad - optimized for high-power density and thermal dissipation |
Pinout & Package
TPS65941120RWERQ1 uses an 8 mm × 8 mm, 56-pin VQFNP package with 0.5-mm pitch and integrated thermal pad for enhanced thermal performance in automotive PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| FB_B1–FB_B5 | BUCK feedback inputs | Enable precise output voltage regulation; FB_B1/FB_B2 support differential sensing in multi-phase BUCK12/123/1234 |
| PVIN_B1–PVIN_B5 | BUCK input power pins | Accept 3–5.5 V input; internally tied to VCCA when unused - decoupling required per regulator |
| SW_B1–SW_B5 | BUCK switch node outputs | Drive external inductors; SW_B1/SW_B2 and SW_B3/SW_B4 are duplicated for current sharing in multi-phase |
| VOUT_LDO1–VOUT_LDO4 | LDO output terminals | Deliver regulated 0.6–3.3 V (LDO1–LDO3) or 1.2–3.3 V (LDO4); LDO4 optimized for low-noise analog/RTC loads |
| OSC32KIN/OSC32KOUT/OSC32KCAP | 32-kHz crystal interface | Supports external 32.768 kHz crystal with internal 100 Ω series resistor; enables RTC timekeeping during main power loss |
| GPIO1–GPIO11 | Configurable I/O | Support power sequencing outputs, ESM inputs (nERR_MCU/nERR_SoC), watchdog triggers (TRIG_WDOG), and CLK32KOUT/SYNCCLKOUT routing |
Key Features
| Feature | Design Value |
|---|---|
| ASIL-D Hardware Integrity | Includes CRC on NVM and configuration registers, thermal pre-warning, and dual ESM inputs - prevents unknown-state startup and supports diagnostic coverage targets |
| Multi-Phase BUCK Flexibility | BUCK1–BUCK4 support 2-, 3-, or 4-phase configurations up to 14 A total - reduces ripple, improves transient response, and enables dynamic phase scaling |
| Dedicated Q&A Watchdog Interface | I²C2 channel reserved exclusively for watchdog handshake - isolates safety-critical monitoring from main configuration traffic |
| Backup Supply Management | VBACKUP input powers RTC and 32-kHz oscillator during main supply failure - maintains timekeeping and wake-up capability from coin cell/supercap |
| Configurable Power Sequencing | NVM-stored power-up/down sequences with digital input triggers and output signal inclusion - eliminates external sequencer ICs in complex SoC systems |
| Low-Noise LDO4 | 300 mA LDO with 25-mV voltage steps and optimized PSRR - supplies noise-sensitive analog circuits like ADC references or RF bias rails |
Applications
| ADAS Domain Controller Power | Automotive Digital Cluster |
|---|---|
Use Scenario: Powers vision processor, radar SoC, and sensor fusion MCU in L2+/L3 autonomous driving systems requiring ASIL-B/D decomposition. IC Role / Device Role / Timing Role: Central PMIC managing core logic, memory, I/O, and safety island rails with synchronized multi-phase BUCKs and fault-monitored LDOs. Use Value: Enables deterministic power sequencing, real-time thermal/fault reporting, and watchdog Q&A - critical for ISO 26262 FMEDA and diagnostic coverage validation. | Use Scenario: Supplies instrument cluster SoC, TFT display timing controller, and CAN-FD gateway in premium vehicle dashboards. IC Role / Device Role / Timing Role: Single-chip power solution delivering 5 BUCKs for CPU/GPU/memory rails and 4 LDOs for display bias, audio codec, and RTC backup. Use Value: Reduces BOM count by eliminating discrete sequencers and backup supervisors while maintaining AEC-Q100 Grade 1 and ASIL-D readiness. |
| Telematics Control Unit (TCU) | Body Control Module (BCM) |
Use Scenario: Manages LTE/V2X modem, GNSS receiver, and microcontroller in cellular-connected vehicle gateways operating across temperature extremes. IC Role / Device Role / Timing Role: Provides stable 1.2 V/1.8 V/3.3 V rails with low-noise LDO4 for GNSS RF front-end and RTC-backed wake-up for periodic network polling. Use Value: 2 μA shutdown current extends battery life during vehicle sleep; 32-kHz RTC with VBACKUP ensures accurate time sync after ignition cycles. | Use Scenario: Powers door module MCU, LIN transceivers, and LED drivers in distributed body electronics with strict EMC and reliability requirements. IC Role / Device Role / Timing Role: Delivers robust 5 V/3.3 V/1.2 V rails with over-current and short-circuit protection on every output - reducing field failure risk. Use Value: Integrated voltage monitors and PGOOD signaling enable self-diagnostics without external comparators, simplifying ASIL-A/B system compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS65941220RWERQ1 | Same die, different NVM configuration: BUCK4 rated at 4 A single-phase (vs. 3.5 A multi-phase in TPS65941120RWERQ1); identical pinout and safety features | Preferred where higher peak current on single BUCK rail is needed instead of multi-phase current sharing | Select TPS65941120RWERQ1 when multi-phase flexibility across BUCK1–BUCK4 is required; choose TPS65941220RWERQ1 for fixed 4 A BUCK4 demand |
| MAX20429ATGB/V+T | 4 BUCK + 3 LDO, ASIL-B certified only; no RTC, no 32-kHz oscillator; SPI-only interface; 40-pin TQFN | Targeted at non-safety-critical infotainment or gateway modules lacking ASIL-D or RTC requirements | Use only if ASIL-D hardware integrity, RTC, or multi-phase BUCK capability is not required - not a drop-in replacement |
Compared with TPS65941120RWERQ1, TPS65941220RWERQ1 offers higher single-rail BUCK4 current but less multi-phase configurability, while MAX20429ATGB/V+T provides lower integration, reduced safety scope, and no RTC - making TPS65941120RWERQ1 uniquely suited for ASIL-D domain controllers needing full power sequencing, timekeeping, and fault containment.
Availability
TPS65941120RWERQ1 is available at Aetrix Electronics and suitable for automotive ADAS domain controllers, digital instrument clusters, and telematics control units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant traceability.
Supply support for TPS65941120RWERQ1 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 automotive qualification expertise and ISO/TS 16949-certified manufacturing.
The TPS6594-Q1 product line delivers functional safety-compliant PMICs for ASIL-D automotive systems, designed specifically for domain controllers, central gateways, and safety-critical ECUs requiring integrated power sequencing, diagnostics, and RTC backup.
FAQ
What automotive safety standards does the TPS65941120RWERQ1 comply with?
The TPS65941120RWERQ1 is AEC-Q100 Grade 1 qualified (−40°C to +125°C) and developed for functional safety applications with hardware integrity up to ASIL-D per ISO 26262. It includes documentation supporting system-level design up to ASIL-D and SIL-3 per IEC 61508, plus CRC-protected NVM, thermal monitoring, and dual ESM inputs - all confirmed in TI's functional safety documentation package for TPS65941120RWERQ1.
Does the TPS65941120RWERQ1 support multi-phase operation across all BUCK regulators?
The TPS65941120RWERQ1 supports flexible multi-phase configuration for BUCK1–BUCK4 only - enabling 2-, 3-, or 4-phase operation up to 14 A aggregate current. BUCK5 operates as a standalone 2 A regulator with no multi-phase capability. This architecture is explicitly documented in the device functional description and pin configuration tables for TPS65941120RWERQ1.
How is the real-time clock (RTC) powered during main supply loss in the TPS65941120RWERQ1?
The TPS65941120RWERQ1 uses the VBACKUP input to maintain RTC and 32-kHz oscillator operation during main supply failure. When VBACKUP is connected to a coin cell or supercapacitor, the internal LDOVRTC and oscillator continue running - preserving calendar time and enabling wake-up events. This behavior is specified in the backup supply management section of the TPS65941120RWERQ1 datasheet.
What interfaces does the TPS65941120RWERQ1 provide for functional safety monitoring?
The TPS65941120RWERQ1 provides two dedicated error signal monitor (ESM) inputs (nERR_MCU and nERR_SoC), a Q&A watchdog over I²C2, thermal warning/shutdown outputs, and register/NVM CRC checking. These mechanisms are integral to its ASIL-D hardware integrity claim and are fully implemented in the TPS65941120RWERQ1 silicon - not optional features.
Can the TPS65941120RWERQ1 generate a synchronized clock output for external devices?
Yes, the TPS65941120RWERQ1 supports SYNCCLKOUT on GPIO8 and GPIO9, providing a clock output synchronized to the internal BUCK switching frequency (2.2 MHz or 4.4 MHz) or external SYNCCLKIN. This feature is documented in the pin attributes table and functional diagram for TPS65941120RWERQ1 and enables EMI reduction and timing alignment across multiple power stages.
TPS65941120RWERQ1 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:
- 19mA
- Voltage - Supply:
- 3V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 56-VQFNP (8x8)
TPS65941120RWERQ1 FAQ
1.How can I place an order for TPS65941120RWERQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS65941120RWERQ1 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 TPS65941120RWERQ1 reliable?
The price and inventory of TPS65941120RWERQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS65941120RWERQ1 is usually 5 days.
3.What payment methods are accepted for TPS65941120RWERQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS65941120RWERQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS65941120RWERQ1?
TPS65941120RWERQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS65941120RWERQ1 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 TPS65941120RWERQ1?
For technical support, including TPS65941120RWERQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS65941120RWERQ1 requirements.
6.How does Aetrix verify that TPS65941120RWERQ1 is sourced from the original manufacturer or authorized distributors?
All TPS65941120RWERQ1 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 TPS65941120RWERQ1 meets industry standards.
7.What is the process for return or replacement of TPS65941120RWERQ1?
All TPS65941120RWERQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TPS65941120RWERQ1, 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 TPS65941120RWERQ1 part is unused and in its original packaging.
Return procedure for TPS65941120RWERQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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