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Texas Instruments LP876411B4RQKRQ1
- Part No.:
- LP876411B4RQKRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 32-PowerVFQFN
- Datasheet:
-
LP876411B4RQKRQ1.pdf
- Description:
- IC REG BUCK ADJ 20A QUAD 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,985
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Product details
Overview
LP876411B4RQKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified four-phase buck converter IC with integrated FETs, delivering up to 20 A total output current across four 5-A phases, programmable 0.3 V–3.34 V output voltage, 2.2/4.4 MHz switching frequency, and functional safety support up to ASIL-D for ADAS domain controllers.
For engineers reviewing the LP876411B4RQKRQ1 datasheet, LP876411B4RQKRQ1 pinout, LP876411B4RQKRQ1 application, or LP876411B4RQKRQ1 equivalent, key selection criteria include multi-phase configuration flexibility (1–4 phases), remote differential sensing for point-of-load accuracy, SPMI/I²C/SPI interface support, and integrated windowed voltage/current/thermal monitoring for safety-critical power rails.
Technical Context
The LP876411B4RQKRQ1 implements four synchronous buck converter cores configurable as one 4-phase, two 2-phase, or four independent 1-phase outputs, with automatic phase shedding and PFM/PWM mode transition to maintain high efficiency across 0–20 A load range. It supports remote differential feedback on all multiphase outputs to compensate PCB IR drop.
Functional safety features include CRC-protected configuration registers and non-volatile memory, dual-mode watchdog (trigger/Q&A), level or PWM error signal monitoring, thermal warning/shutdown, and windowed overvoltage/overcurrent detection - all verified per ISO 26262 ASIL-D and IEC 61508 SIL-3 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.8 V to 5.5 V - supports direct connection to automotive 3.3 V or 5 V supply rails without pre-regulation. |
| Output Current Capability | Up to 20 A total - achieved via four interleaved 5-A phases, enabling high-current POL delivery with reduced ripple and thermal stress. |
| Output Voltage Range | 0.3 V to 3.34 V - covers core logic, I/O, and analog rail requirements for modern ADAS processors and sensors. |
| Switching Frequency | 2.2 MHz or 4.4 MHz - enables compact external passive component selection and EMI spread-spectrum operation. |
| Operating Temperature | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and ECU-mounted automotive applications. |
| Interface Support | SPMI, I²C, SPI - allows multi-PMIC synchronization and flexible host controller integration in domain controller architectures. |
| Protection Features | Windowed OVP/UVP, overcurrent, thermal shutdown, CRC register integrity - meets ASIL-D hardware integrity requirements. |
Pinout & Package
VQFN-HR (RQK) package, 32-pin, 5.5 mm × 5.0 mm body size, 0.5 mm pitch, 1.0 mm max height, exposed thermal pad - optimized for high-power density and thermal performance in space-constrained ADAS modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B1–SW_B4 | Power switch node (per phase) | Connects to external inductor; each drives one buck phase leg with integrated high-side/low-side FETs. |
| PVIN_B1–PVIN_B4 | Phase input voltage supply | Dedicated input pins per phase enable localized bulk capacitance placement and reduce input loop inductance. |
| FB_B1–FB_B4 | Feedback input (per phase) | Supports remote differential sensing for precise point-of-load regulation; enables accurate multi-phase voltage tracking. |
| VIN, VIO, VCCA | Supply rails | VIN powers internal circuitry; VIO supplies I/O interface; VCCA provides analog reference and bias for control loops. |
| nINT, SCL_I2C1/SCK_SPI, SDA_I2C1/SDI_SPI | Control interface signals | Interrupt output and dual-mode serial interface (I²C/SPI) allow seamless integration with microcontrollers or ASIL-B hosts. |
| GPIO1–GPIO10 | Configurable general-purpose I/O | Programmable as inputs/outputs for status reporting, sequencing control, or system-level fault signaling. |
Key Features
| Feature | Design Value |
|---|---|
| Four-phase buck architecture | Enables scalable 5–20 A output with <5 mV output ripple at full load and >90% peak efficiency at 2.2 MHz/1.2 V. |
| Remote differential voltage sensing | Compensates for up to 50 mV IR drop between regulator output and processor VDD, ensuring ±0.5% load regulation accuracy. |
| ASIL-D functional safety compliance | Includes hardware-level CRC protection, dual watchdog modes, and windowed monitors - eliminates need for external safety monitors. |
| Multi-protocol serial interface | SPMI/I²C/SPI compatibility allows use in heterogeneous PMIC clusters and simplifies firmware updates across vehicle platforms. |
| Programmable slew rate | 0.5–33 mV/µs output voltage ramp control prevents inrush current during power-up and meets processor AVS timing requirements. |
Applications
| Front Camera Power Management | Long-Range Radar ECU |
|---|---|
|
Use Scenario: Powers image signal processor (ISP), CMOS sensor, and SerDes in automotive front camera modules requiring low-noise, tightly regulated 1.0 V and 1.8 V rails. IC Role / Device Role / Timing Role: Primary multi-rail power source with dynamic voltage scaling and fast transient response to handle burst-mode imaging loads. Use Value: Four-phase configuration delivers 12 A combined current with <10 µs load-step recovery, eliminating need for secondary LDOs. |
Use Scenario: Supplies RF transceiver, DSP, and memory in 77 GHz radar control units operating in extreme temperature environments. IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC/DC converter with integrated thermal shutdown and remote sensing for millimeter-wave subsystems. Use Value: 125°C ambient rating and thermal warning output enable reliable operation without derating in sealed radar enclosures. |
| Surround View System ECU | ADAS Domain Controller |
|
Use Scenario: Manages power for four camera inputs, video processor, and Ethernet switch in 360° surround-view systems. IC Role / Device Role / Timing Role: Configurable multi-phase buck controller supporting independent sequencing and voltage programming per subsystem rail. Use Value: 10 GPIOs enable hardware-based power sequencing and fault flag aggregation, reducing MCU firmware overhead. |
Use Scenario: Delivers core, I/O, and memory voltages to high-performance SoCs (e.g., TDA4VM) in centralized ADAS domain controllers. IC Role / Device Role / Timing Role: Safety-certified power management unit with ASIL-D capable monitoring and SPMI synchronization across multiple PMICs. Use Value: Integrated windowed monitors and CRC-protected registers eliminate external safety diagnostics, shortening FMEDA effort by ~30%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase buck converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP876411B5RQKRQ1 | Same package and pinout; differs only in factory-programmed OTP configuration - supports different default output voltage and startup sequence. | Targeted for alternate ADAS sub-systems (e.g., rear camera vs. front camera) requiring distinct power-up timing or rail ordering. | Select when matching pre-configured startup behavior is required; no hardware changes needed. |
| TPS659412RWERQ1 | 6-channel PMIC with three buck converters (max 12 A total), integrated LDOs, and CAN-FD interface - lacks 4-phase interleaving and ASIL-D hardware certification. | Suitable for lower-complexity ADAS ECUs where multi-phase current capability and full ASIL-D compliance are not mandated. | Choose for cost-sensitive designs needing mixed power rails but not 20 A output or certified functional safety hardware. |
Compared with LP876411B5RQKRQ1, the LP876411B4RQKRQ1 offers identical electrical and mechanical specs but a distinct factory OTP map for voltage/sequence defaults; versus TPS659412RWERQ1, it provides higher current scalability and certified ASIL-D monitoring - critical for domain controller safety islands.
Availability
LP876411B4RQKRQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), front camera modules, and surround view ECUs requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant traceability.
Supply support for LP876411B4RQKRQ1 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 specializing in analog and embedded processing technologies, with deep expertise in automotive power management and functional safety design.
The LP8764-Q1 product line was developed specifically for high-reliability, safety-critical automotive power delivery - targeting ADAS domain controllers, radar, and vision systems requiring ASIL-D compliant, multi-phase, high-current DC/DC conversion.
FAQ
What is the maximum output current supported by the LP876411B4RQKRQ1?
The LP876411B4RQKRQ1 supports up to 20 A total output current using its four-phase architecture, with each phase delivering up to 5 A. This is achieved through interleaved switching that reduces input/output ripple and thermal concentration. The LP876411B4RQKRQ1 maintains this rating across its full –40°C to +125°C operating range when used with appropriate PCB layout and thermal management per TI's recommended land pattern.
Does the LP876411B4RQKRQ1 support functional safety certification?
Yes, the LP876411B4RQKRQ1 is developed for functional safety applications and supports system-level design up to ASIL-D per ISO 26262 and SIL-3 per IEC 61508. It includes hardware-level features such as CRC-protected configuration registers, windowed voltage/current monitors, dual-mode watchdog, and thermal warning/shutdown - all documented in TI's functional safety FIT report and safety manual for the LP8764-Q1 family.
What interfaces does the LP876411B4RQKRQ1 support for configuration and monitoring?
The LP876411B4RQKRQ1 supports SPMI, I²C, and SPI serial interfaces for register access, real-time monitoring, and dynamic reconfiguration. SPMI enables synchronized operation with other TI PMICs in multi-rail systems, while I²C/SPI provide backward compatibility with legacy host controllers. All interfaces operate at standard speeds (up to 1 MHz for I²C, 10 MHz for SPI) and share common pins with selectable protocol mode via OTP or strap options.
Can the LP876411B4RQKRQ1 be configured for single-phase operation?
Yes, the LP876411B4RQKRQ1 is fully configurable from one 4-phase output to four independent 1-phase outputs via its internal configuration registers. In 1-phase mode, each buck channel delivers up to 5 A with programmable voltage (0.3–3.34 V), slew rate (0.5–33 mV/µs), and switching frequency (2.2/4.4 MHz). This flexibility allows the same LP876411B4RQKRQ1 to serve diverse subsystems within a single vehicle platform.
What package type and thermal characteristics does the LP876411B4RQKRQ1 use?
The LP876411B4RQKRQ1 uses the VQFN-HR (RQK) package: 32-pin, 5.5 mm × 5.0 mm body, 0.5 mm pitch, with an exposed thermal pad. Its thermal resistance θJA is 32°C/W on a 2-layer JEDEC board, and θJC is 3.5°C/W to the exposed pad. TI recommends soldering the thermal pad to a minimum 200 mm² copper pour with ≥4 thermal vias for optimal junction temperature control in continuous 20 A operation.
LP876411B4RQKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-PowerVFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 4
- Voltage - Input (Min):
- 2.8V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.3V
- Voltage - Output (Max):
- 3.34V
- Current - Output:
- 20A
- Frequency - Switching:
- 2.2MHz, 4.4MHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-QFN (5.5x5)
LP876411B4RQKRQ1 FAQ
1.How can I place an order for LP876411B4RQKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP876411B4RQKRQ1 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 LP876411B4RQKRQ1 reliable?
The price and inventory of LP876411B4RQKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP876411B4RQKRQ1 is usually 5 days.
3.What payment methods are accepted for LP876411B4RQKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP876411B4RQKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP876411B4RQKRQ1?
LP876411B4RQKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP876411B4RQKRQ1 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 LP876411B4RQKRQ1?
For technical support, including LP876411B4RQKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP876411B4RQKRQ1 requirements.
6.How does Aetrix verify that LP876411B4RQKRQ1 is sourced from the original manufacturer or authorized distributors?
All LP876411B4RQKRQ1 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 LP876411B4RQKRQ1 meets industry standards.
7.What is the process for return or replacement of LP876411B4RQKRQ1?
All LP876411B4RQKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP876411B4RQKRQ1, 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 LP876411B4RQKRQ1 part is unused and in its original packaging.
Return procedure for LP876411B4RQKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP876411B4RQKRQ1 Tags
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