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Texas Instruments LP876924C3RQKRQ1
- Part No.:
- LP876924C3RQKRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 32-PowerVFQFN
- Datasheet:
-
LP876924C3RQKRQ1.pdf
- Description:
- IC REG BUCK PROG 20A QUAD 32VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,878
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Product details
Overview
LP876924C3RQKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified quad step-down DC-DC power management IC with functional safety compliance up to ASIL-D, 2.2/4.4 MHz switching frequency, 0.3–3.34 V programmable output voltage per channel, and 5 A per phase capability (20 A in 4-phase mode). It serves as the primary power supply for ADAS domain controllers and radar processors.
For engineers reviewing the LP876924C3RQKRQ1 datasheet, LP876924C3RQKRQ1 pinout, LP876924C3RQKRQ1 application, or LP876924C3RQKRQ1 equivalent, key selection considerations include its SPMI/I²C/SPI interface support, remote differential sensing for multiphase outputs, windowed voltage/over-current monitoring, watchdog with Q&A mode, and thermal shutdown with high-temp warning - all critical for ISO 26262 ASIL-D system integration.
Technical Context
The LP876924C3RQKRQ1 integrates four synchronous buck converters configurable from one 4-phase output to four independent 1-phase outputs, with automatic PFM/PWM mode transition and dynamic phase shedding to maximize efficiency across 0–5 A load range. Its internal LDO supplies VIO and VCCA rails, while dedicated PVIN_Bx inputs enable independent input sourcing per buck channel.
It implements hardware-level functional safety features including CRC-protected configuration registers and non-volatile memory, level/PWM error signal monitoring (ESM), synchronized clocking with external reference or spread-spectrum operation, and dual sleep/wakeup request inputs (nSLEEP1/2, WKUP1/2) for coordinated low-power sequencing in domain controller architectures.
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 with robust UVLO and OVP protection. |
| Output Voltage Range | 0.3 V to 3.34 V - covers core logic (0.8 V), I/O (1.8 V), and analog (3.3 V) rails; multi-phase outputs limited to 0.3–1.9 V for improved regulation accuracy. |
| Max Output Current | 5 A per phase, up to 20 A total in 4-phase configuration - enables single-chip power delivery for high-performance SoCs like TI's Jacinto 7 in ADAS ECUs. |
| Switching Frequency | 2.2 MHz or 4.4 MHz - allows compact external filter design with ≤2.2 µH inductors and supports EMI reduction via spread-spectrum mode. |
| Operating Temperature | –40°C to +125°C ambient - qualified per AEC-Q100 Grade 1 for under-hood and front-camera module placement. |
| Functional Safety | ASIL-D systematic capability & hardware integrity - includes windowed voltage monitors, thermal shutdown, watchdog with trigger/Q&A mode, and CRC on config registers. |
| Interface Support | I²C, SPI, and SPMI - enables multi-PMIC synchronization in distributed power architectures and flexible host processor integration. |
Pinout & Package
VQFN-HR (RQK) 32-pin package, 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 automotive modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW_B1–SW_B4 | Buck switch node | High-frequency switching nodes for each buck regulator; require low-inductance layout and local ceramic filtering. |
| PVIN_B1–PVIN_B4 | Independent buck input | Separate power inputs per channel - must be tied to VCCA and locally bypassed; enables input rail isolation in multi-source systems. |
| FB_B1–FB_B4 | Feedback input | Remote differential sensing points for output voltage regulation; FB_B2/FB_B4 serve as ground sense in multiphase configurations. |
| SCL_I2C1/SCK_SPI & SDA_I2C1/SDI_SPI | Config interface | Dual-mode serial interface pins - selectable between I²C and SPI; support boot-time configuration and runtime reprogramming. |
| nINT | Interrupt output | Open-drain fault indicator - asserts low on over-temperature, over-current, or voltage monitor violation; requires external pull-up. |
| GPIO1–GPIO10 | Configurable I/O | 10 multifunction pins supporting EN_DRV, nRSTOUT_SOC, PGOOD, WKUP/nSLEEP, and VMON inputs - used for power sequencing and system coordination. |
Key Features
| Feature | Design Value |
|---|---|
| Multi-phase configurability | Supports 1–4 phase mapping across four buck cores - enables scalable output current (5–20 A) and ripple cancellation without external components. |
| Remote differential sensing | Compensates IR drop between regulator output and point-of-load - maintains ±1% output accuracy under dynamic load conditions in long PCB traces. |
| SPMI interface | Enables deterministic, low-latency synchronization of multiple LP8769x-Q1 devices - essential for time-critical power sequencing in domain controllers. |
| Programmable slew rate | 0.5–33 mV/µs output voltage ramp control - prevents inrush current and ensures glitch-free startup for sensitive SoC cores and peripherals. |
| Thermal monitoring | Integrated die temperature sensor with high-temp warning and hard thermal shutdown at >150°C - protects against sustained overload or cooling failure. |
Applications
| Front Camera Power Management | Long-Range Radar ECU |
|---|---|
Use Scenario: Powers image signal processor (ISP), CMOS sensor, and SerDes in automotive front-facing camera modules operating in ambient temperatures up to 125°C. IC Role / Device Role / Timing Role: Primary quad-rail PMIC delivering 0.8 V (core), 1.1 V (memory), 1.8 V (I/O), and 3.3 V (analog) with synchronized startup sequencing. Use Value: Eliminates need for discrete LDOs and external sequencers; remote sensing ensures stable ISP voltage despite trace resistance in compact camera housings. | Use Scenario: Supplies RF transceiver, DSP, and ADC in 77 GHz radar units requiring ultra-low noise and precise voltage tracking under vibration and thermal cycling. IC Role / Device Role / Timing Role: High-efficiency 4-phase buck supplying 1.0 V @ 4.5 A to DSP core, with spread-spectrum mode minimizing EMI coupling into RF front-end. Use Value: 4.4 MHz operation enables small 1.5 µH inductors; thermal shutdown prevents damage during antenna obstruction-induced overheating. |
| 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 deployed in parking assist and automated valet applications. IC Role / Device Role / Timing Role: Configured as four independent 1-phase regulators, each powering a camera subsystem with individual PGOOD and fault reporting via GPIOs. Use Value: 10 GPIOs enable per-camera reset control and wake-on-event functionality; SPMI allows centralized power state management across all four channels. | Use Scenario: Provides tightly regulated, sequenced power to heterogeneous compute clusters (CPU, GPU, AI accelerator) in zonal or domain-based vehicle architectures. IC Role / Device Role / Timing Role: Operated in 4-phase mode for 20 A @ 0.85 V to main SoC, with independent 1-phase rails for PCIe, DDR, and safety MCU - all coordinated via SPMI. Use Value: ASIL-D certified monitoring and CRC-protected registers meet ISO 26262 requirements for safety island integration without additional safety hardware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-buck power management applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP876424RQKRQ1 | Triple buck + dual LDO architecture; no SPMI; lower max current (3 A per buck) | Targeted at mid-tier ADAS cameras with simpler rail count and no multi-PMIC sync requirement | Select when system needs only three regulated rails and cost-sensitive BOM optimization is prioritized over ASIL-D certification. |
| TPS659412RQKRQ1 | Quad buck + 3 LDOs; supports higher input voltage (2.7–5.5 V); no spread-spectrum mode; different GPIO mapping | Used in infotainment and telematics where EMI constraints are less stringent than radar/front-camera domains | Choose when integrating companion LDOs is required and functional safety documentation for ASIL-D is not mandatory. |
Compared with LP876924C3RQKRQ1, LP876424RQKRQ1 offers reduced feature set and lower safety certification level, while TPS659412RQKRQ1 provides broader voltage tolerance and integrated LDOs but lacks spread-spectrum EMI reduction and full ASIL-D hardware integrity - making LP876924C3RQKRQ1 optimal for safety-critical, high-density ADAS power delivery.
Availability
LP876924C3RQKRQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), front camera modules, and long-range radar ECUs requiring stable component supply, AEC-Q100 qualification, and functional safety compliance.
Supply support for LP876924C3RQKRQ1 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 expertise.
The LP8769x-Q1 product line was designed specifically for high-reliability, safety-critical automotive power delivery in ADAS domain controllers, radar, and camera systems - emphasizing ASIL-D compliance, thermal robustness, and multi-PMIC coordination.
FAQ
What is the maximum supported switching frequency for LP876924C3RQKRQ1?
The LP876924C3RQKRQ1 supports two fixed switching frequencies: 2.2 MHz and 4.4 MHz. These are selected via configuration register settings and cannot be tuned continuously. The 4.4 MHz option enables smaller passive components and tighter EMI control, while 2.2 MHz delivers higher peak efficiency at medium loads. Both frequencies support spread-spectrum modulation to reduce conducted emissions.
Does LP876924C3RQKRQ1 support remote voltage sensing for all four buck outputs?
Yes, LP876924C3RQKRQ1 supports remote differential voltage sensing on all four buck outputs via dedicated FB_Bx pins. In multiphase configurations (e.g., 2-phase or 4-phase), FB_B2 and FB_B4 function as ground-sense inputs to compensate for IR drop between the regulator and point-of-load, ensuring ±1% output accuracy even with PCB trace resistance up to 50 mΩ.
How many GPIOs does LP876924C3RQKRQ1 provide, and what are their primary safety-related functions?
LP876924C3RQKRQ1 provides 10 configurable GPIOs (GPIO1–GPIO10). Key safety-related functions include nRSTOUT_SOC for system reset assertion, ENABLE_DRV for safe-state indication, and nSLEEP1/nSLEEP2 for coordinated low-power entry. Several GPIOs also support WKUP1/WKUP2 for asynchronous wake-up, enabling fail-safe recovery sequences in ASIL-D systems.
Is LP876924C3RQKRQ1 pin-compatible with other devices in the LP8769x-Q1 family?
No, LP876924C3RQKRQ1 is not pin-compatible with other LP8769x-Q1 variants such as LP876940C0RQKRQ1 or LP876945C6RQKRQ1. While all share the same VQFN-HR (RQK) 32-pin package and mechanical footprint, pin functions differ significantly across variants - particularly for FB, SW, and GPIO assignments - requiring unique PCB layouts for each part number.
What functional safety documentation is available for LP876924C3RQKRQ1?
Texas Instruments provides comprehensive functional safety documentation for LP876924C3RQKRQ1, including FMEDA reports, safety manuals, and diagnostic coverage analysis supporting ISO 26262 ASIL-D and IEC 61508 SIL-3 system integration. These documents detail hardware integrity metrics, diagnostic mechanisms (CRC, windowed monitors, watchdog), and guidance for achieving systematic capability up to ASIL-D in end-equipment designs.
LP876924C3RQKRQ1 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:
- Programmable
- 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
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 32-VQFN-HR (5.5x5)
LP876924C3RQKRQ1 FAQ
1.How can I place an order for LP876924C3RQKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP876924C3RQKRQ1 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 LP876924C3RQKRQ1 reliable?
The price and inventory of LP876924C3RQKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP876924C3RQKRQ1 is usually 5 days.
3.What payment methods are accepted for LP876924C3RQKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP876924C3RQKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP876924C3RQKRQ1?
LP876924C3RQKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP876924C3RQKRQ1 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 LP876924C3RQKRQ1?
For technical support, including LP876924C3RQKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP876924C3RQKRQ1 requirements.
6.How does Aetrix verify that LP876924C3RQKRQ1 is sourced from the original manufacturer or authorized distributors?
All LP876924C3RQKRQ1 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 LP876924C3RQKRQ1 meets industry standards.
7.What is the process for return or replacement of LP876924C3RQKRQ1?
All LP876924C3RQKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP876924C3RQKRQ1, 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 LP876924C3RQKRQ1 part is unused and in its original packaging.
Return procedure for LP876924C3RQKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP876924C3RQKRQ1 Tags
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