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Texas Instruments LP876242B0RQKRQ1
- Part No.:
- LP876242B0RQKRQ1
- Manufacturer:
- Texas Instruments
- Package:
- 32-PowerVFQFN
- Datasheet:
-
LP876242B0RQKRQ1.pdf
- Description:
- IC REG BUCK ADJ QUAD 32QFN
- Quantity:
- Payment:
- Shipping:
Inventory:2,925
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Product details
Overview
LP876242B0RQKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive power management IC (PMIC) integrating four high-frequency 8.8-MHz buck converters for radar MMICs, delivering 4/3/3/2 A output currents across 0.9 V–1.9 V outputs with programmable slew rates (0.5–33 mV/µs), and featuring SPMI/I²C/SPI interfaces, 10 configurable GPIOs, and functional safety support up to ASIL-D.
For engineers reviewing the LP876242B0RQKRQ1 datasheet, LP876242B0RQKRQ1 pinout, LP876242B0RQKRQ1 application, or LP876242B0RQKRQ1 equivalent, key selection considerations include its 8.8-MHz switching frequency for compact filter design, interleaved phase operation to reduce input ripple, integrated windowed voltage and over-current monitoring, thermal shutdown with warning, and CRC-protected configuration registers for safety-critical radar power sequencing.
Technical Context
The LP876242B0RQKRQ1 implements four independent 1-phase buck regulators with forced PWM mode, fixed 8.8-MHz switching frequency, and interleaved phase timing to minimize input capacitor RMS current. Each converter supports programmable output voltage (0.9 V–1.9 V) and slew rate (0.5–33 mV/µs), with dedicated feedback pins (FB_B1–FB_B4) and switch-node terminals (SW_B1–SW_B4).
It integrates functional safety mechanisms including register and interface CRC, short-circuit protection, thermal monitoring with high-temp warning and shutdown, watchdog with selectable trigger/Q&A mode, and level/PWM error signal monitoring (ESM). Power sequencing is managed via 10 GPIOs supporting EN_DRV, nRSTOUT_SOC, PGOOD, nSLEEP/WKUP, and external voltage monitoring (VMON1/VMON2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.0 V to 5.5 V - Supports direct connection to automotive 3.3 V or 5 V rails without pre-regulation. |
| Buck Output Current | 4 A / 3 A / 3 A / 2 A - Enables simultaneous powering of multiple AWR/IWR MMIC cores with headroom for peak radar transmit loads. |
| Switching Frequency | 8.8 MHz - Allows use of small 0.47–1 µF ceramic output capacitors and sub-1 µH inductors for space-constrained radar modules. |
| Output Voltage Range | 0.9 V to 1.9 V - Matches core supply requirements of TI's AWR2944, IWR6843, and similar mmWave radar processors. |
| Programmable Slew Rate | 0.5 mV/µs to 33 mV/µs - Enables controlled power-up/down sequencing to prevent inrush current and meet system-level dV/dt constraints. |
| Functional Safety Level | ASIL-D capable - Includes hardware integrity verification, systematic capability analysis, and documentation for ISO 26262 system integration. |
| Interface Support | I²C, SPI, and SPMI - Enables multi-PMIC synchronization in cascaded radar systems and compatibility with host MCU or radar processor communication protocols. |
Pinout & Package
The LP876242B0RQKRQ1 is housed in a 32-pin VQFN-HR package (5.50 mm × 5.00 mm) with wettable flanks, optimized for automotive thermal and reliability requirements. It features separate PVIN_Bx power inputs per buck channel, dual AGND/PGND domains, and dedicated analog feedback and switch-node terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN, PVIN_B1–B4, VCCA, VIO | Power Inputs | Dedicated input rails per buck stage (PVIN_Bx) plus internal LDO supply (VCCA) and digital I/O supply (VIO); PVIN_Bx must be locally bypassed and tied to VCCA externally. |
| SW_B1–B4 | Buck Switch Nodes | High-side FET drain connections; require low-inductance layout to gate driver and inductor for EMI control and efficiency. | FB_B1–B4 | Output Voltage Feedback | Resistive divider inputs for closed-loop regulation; high-impedance analog inputs requiring guard ring and noise isolation. |
| nINT, GPIO1–10 | Digital I/O Terminals | Configurable as interrupt output, power-good indicator, reset signal, sleep/wake request, or external voltage monitor inputs (VMON1/VMON2). |
| SCL_I2C1/SCK_SPI, SDA_I2C1/SDI_SPI | Serial Interface Pins | Shared pins for I²C or SPI communication; function selected at boot via NVM configuration - not runtime-switchable. |
| GPIO8, GPIO9 | SPMI Interface | Configured as SCLK_SPMI (output in master, input in slave) and SDATA_SPMI (bidirectional) for synchronized multi-PMIC operation. |
Key Features
| Feature | Design Value |
|---|---|
| Four 8.8-MHz Buck Converters | Enables ultra-compact DC/DC solution for mmWave radar; reduces total passive area by >40% vs. 2.2-MHz alternatives. |
| Interleaved Phase Timing | Reduces input capacitor RMS current by ~30%, lowering thermal stress and enabling smaller bulk capacitance. |
| ASIL-D Functional Safety Architecture | Includes CRC on all configuration registers and NVM, windowed voltage monitors, and thermal shutdown with early-warning flag for fail-safe response. |
| 10-Channel Configurable GPIO | Supports full power sequencing - e.g., GPIO1 as EN_DRV for external regulator enable, GPIO5 as SYNCCLKIN for clock synchronization. |
| Multi-Protocol Serial Interface | SPMI enables deterministic timing across multiple PMICs; I²C/SPI provides flexibility for legacy or resource-constrained host controllers. |
Applications
| Imaging Radar (Cascaded) | Long-Range Radar |
|---|---|
Use Scenario: Cascaded AWR2944-based imaging radar module with distributed processing across multiple sensor units. IC Role / Device Role / Timing Role: Primary power sequencer and voltage regulator for four independent MMIC supply domains (VDDA, VDD_DIG, VDD_RF, VDD_PLL), synchronized via SPMI. Use Value: Ensures precise inter-device power-up timing and rail coordination across cascaded units, eliminating startup race conditions and enabling deterministic beamforming calibration. | Use Scenario: Single-chip long-range radar transceiver (e.g., IWR6843) operating in harsh under-hood environments. IC Role / Device Role / Timing Role: Four-rail buck regulator with thermal monitoring and ASIL-D diagnostics, supplying core, I/O, RF, and PLL domains. Use Value: Maintains stable 1.2 V core and 1.8 V RF supplies across –40°C to +125°C ambient, with thermal warning interrupt triggering firmware throttling before shutdown. |
| Radar Module (No Processing) | Automotive ADAS Sensor Hub |
Use Scenario: Compact radar front-end module feeding analog baseband to centralized domain controller. IC Role / Device Role / Timing Role: Standalone power manager generating regulated rails for MMIC, LNA, and mixer stages, with GPIO-driven enable sequencing. Use Value: Eliminates need for discrete regulators and sequencers; 8.8-MHz operation allows <1 mm² total passive footprint per buck channel. | Use Scenario: Multi-sensor ADAS hub integrating radar, camera, and ultrasonic processing on single PCB. IC Role / Device Role / Timing Role: One of multiple synchronized LP876242B0RQKRQ1 devices managing power for heterogeneous sensor subsystems. Use Value: SPMI interface enables nanosecond-accurate cross-PMIC power state transitions, critical for coordinated wake-up and low-power idle modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-rail automotive PMIC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LP87642B0RQKRQ1 | Same pinout and feature set but with enhanced spread-spectrum modulation and updated thermal shutdown threshold (155°C vs. 150°C). | Preferred for new designs targeting lower EMI emissions in crowded 77-GHz bands. | Select when EMI compliance margin is critical and board layout allows minor firmware update for new spread-spectrum settings. |
| TPS65381A-Q1 | Three buck converters (3 A/3 A/2 A), no SPMI, I²C-only interface, lower max switching frequency (2.2 MHz). | Suitable for cost-sensitive radar variants with fewer supply domains and relaxed size constraints. | Choose only if system requires ≤3 regulated rails and does not rely on multi-PMIC synchronization or 8.8-MHz compactness. |
Compared with LP87642B0RQKRQ1, the LP876242B0RQKRQ1 offers identical core functionality but less aggressive EMI suppression; versus TPS65381A-Q1, it delivers higher integration density and advanced safety features at the cost of higher complexity and BOM count.
Availability
LP876242B0RQKRQ1 is available at Aetrix Electronics and suitable for automotive radar modules, ADAS sensor hubs, and industrial mmWave sensing systems requiring stable component supply, AEC-Q100 qualification, and functional safety certification.
Supply support for LP876242B0RQKRQ1 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, embedded processing, and automotive electronics, with leadership in power management and mmWave radar technology.
The LP876242B0RQKRQ1 belongs to TI's automotive-grade LP876x PMIC family, designed specifically to address the stringent power sequencing, EMI, thermal, and functional safety demands of next-generation 77/79-GHz radar systems.
FAQ
What is the maximum output current capability of each buck converter in the LP876242B0RQKRQ1?
The LP876242B0RQKRQ1 provides four independent buck converters with rated maximum output currents of 4 A (BUCK1), 3 A (BUCK2), 3 A (BUCK3), and 2 A (BUCK4). These values are specified under recommended operating conditions (TA = –40°C to +125°C, VIN = 3.3 V, VOUT = 1.2 V) and assume proper thermal design with adequate PCB copper area and airflow. Derating applies at elevated ambient temperatures or reduced input voltage.
Does the LP876242B0RQKRQ1 support external clock synchronization?
Yes, the LP876242B0RQKRQ1 supports external clock synchronization via the SYNCCLKIN function, configurable on GPIO5 or GPIO9. When enabled, the internal buck switching clock locks to an external reference (1–10 MHz), enabling deterministic phase alignment across multiple LP876242B0RQKRQ1 devices or with other system clocks. This is essential for EMI reduction in multi-PMIC radar modules.
How is functional safety implemented in the LP876242B0RQKRQ1?
The LP876242B0RQKRQ1 implements functional safety through hardware-enforced mechanisms including CRC protection on all configuration registers and non-volatile memory, windowed voltage and over-current monitors, thermal monitoring with early-warning interrupt and shutdown, watchdog timer with trigger/Q&A mode, and level/PWM error signal monitoring. Documentation for ISO 26262 ASIL-D and IEC 61508 SIL-3 system integration is provided by Texas Instruments.
Can the LP876242B0RQKRQ1 operate without an external microcontroller?
No - the LP876242B0RQKRQ1 requires external configuration via I²C, SPI, or SPMI to initialize output voltages, slew rates, sequencing order, and safety thresholds. It does not include factory-programmed default settings for autonomous operation. However, once configured, it maintains regulation and safety monitoring independently, including automatic thermal shutdown and fault reporting via nINT.
What package type and thermal characteristics does the LP876242B0RQKRQ1 use?
The LP876242B0RQKRQ1 uses a 32-pin VQFN-HR package (5.50 mm × 5.00 mm) with wettable flanks for automated optical inspection. Its thermal resistance θJA is 32.5°C/W (JEDEC standard board), and θJC is 5.2°C/W. The device includes on-die thermal monitoring with programmable warning threshold (125°C typical) and hard shutdown at 150°C, both reported via interrupt and status registers.
LP876242B0RQKRQ1 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):
- 0.9V
- Voltage - Output (Max):
- 1.9V
- Current - Output:
- 2A, 3A, 3A, 4A
- Frequency - Switching:
- 8.8MHz
- Synchronous Rectifier:
- Yes
- 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)
LP876242B0RQKRQ1 FAQ
1.How can I place an order for LP876242B0RQKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for LP876242B0RQKRQ1 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 LP876242B0RQKRQ1 reliable?
The price and inventory of LP876242B0RQKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LP876242B0RQKRQ1 is usually 5 days.
3.What payment methods are accepted for LP876242B0RQKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LP876242B0RQKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LP876242B0RQKRQ1?
LP876242B0RQKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LP876242B0RQKRQ1 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 LP876242B0RQKRQ1?
For technical support, including LP876242B0RQKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LP876242B0RQKRQ1 requirements.
6.How does Aetrix verify that LP876242B0RQKRQ1 is sourced from the original manufacturer or authorized distributors?
All LP876242B0RQKRQ1 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 LP876242B0RQKRQ1 meets industry standards.
7.What is the process for return or replacement of LP876242B0RQKRQ1?
All LP876242B0RQKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with LP876242B0RQKRQ1, 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 LP876242B0RQKRQ1 part is unused and in its original packaging.
Return procedure for LP876242B0RQKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LP876242B0RQKRQ1 Tags
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