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Texas Instruments LP876242-Q1 Four 8.8MHz Buck Converters

Texas Instruments LP876242-Q1 Four 8.8MHz Buck Converters meet the power management requirements of processors and platforms in various safety-relevant automotive and industrial applications. The LP876242-Q1 offers four step-down DC/DC converter cores, generating four 1-phase outputs. The I2C-compatible serial interface or SPI controls the device settings. The switching clock is forced to PWM mode, and the phases are interleaved. The switching is synchronized to an external clock, and to minimize disturbances spread spectrum mode can be activated.

The TI LP876242-Q1 buck converters include protection and diagnostic mechanisms such as register and interface CRC, short-circuit protection, thermal monitoring, and shutdown. The LP876242-Q1 can notify the processor of these events through the interrupt handler, enabling the processor to take action in response.

Features

  • AEC-Q100 Qualified with the following results:
    • 3.0V to 5.5V Input voltage
    • Device temperature grade 1 of -40°C to +125°C ambient operating temperature range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4B
  • Functional safety-compliant
    • Developed for functional safety applications
    • Documentation available to aid ISO 26262 system design up to ASIL-D
    • Documentation available to aid IEC 61508 system design up to SIL-3
    • Systematic capability up to ASIL-D
    • Hardware integrity up to ASIL-D
    • Windowed voltage and over-current monitors
    • Watchdog with selectable trigger / Q&A mode
    • Level or PWM error signal monitoring (ESM)
    • Thermal monitoring with high-temperature warning and thermal shutdown
    • Bit-integrity (CRC) error detection on configuration registers and non-volatile memory
  • Four high-efficiency step-down DC/DC converters:
    • Output voltage of 0.9V to 1.9V
    • Maximum output current of 4A/3A/3A/2A
    • Programmable output voltage slew-rate of 0.5mV/µs to 33mV/µs
    • Switching frequency of 8.8MHz
  • Ten configurable general-purpose I/O (GPIO)
  • SPMI interface for multi-PMIC synchronization
  • Input overvoltage monitor (OVP) and undervoltage lockout (UVLO)

Applications

  • Imaging radar using cascaded configuration
  • Long range radar
  • Radar module without processing

Associated Eval Module

Texas Instruments LP876242Q1EVM PMIC Evaluation Module

Highlights the performance and flexibility of the LP876242-Q1 PMIC for xWR radar applications.

Learn Moreabout Texas Instruments LP876242Q1EVM PMIC Evaluation Module View Productsrelated to Texas Instruments LP876242Q1EVM PMIC Evaluation Module

Simplified Schematic

Schematic - Texas Instruments LP876242-Q1 Four 8.8MHz Buck Converters
Published: 2022-12-20 | Updated: 2025-03-10