LP8774x-Q1 evaluation module for ADAS PMIC low-noise configuration 3-buck and 5-V boost


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The LP8774x-Q1 device is designed to meet the power management requirements of the AWR and IWR MMICs in various automotive and industrial radar applications. The device has three step-down DC/DC converters, a 5 V boost converter and a 1.8 V/3.3 V LDO. The LDO is powered from the boost and intended for xWR and peripheral devices IO supply. The device is controlled by an SPI serial interface and by enable signal.

The step-down DC/DC converters support programmable switching frequency of 17.6 MHz, 8.8 MHz or 4.4 MHz and have low noise across wide frequency range which enables LDO-free power solution with minimal or no additional passive filtering. LP8774x-Q1 device offers flexible external component selection to optimize the solution in terms of performance or cost. The features of the device target safety-relevant applications with system-safety requirements up to ASIL-C level.

  • Evaluation of LP877451A1RXVRQ1 device features and performance
  • Onboard wide VIN preregulator to generate 3.3-V input to the PMIC from 12-V battery supply
  • Onboard USB2ANY MCU to communicate with the Device GUI and evaluate device safety features like Q&A watchdog

  • USB-A male to USB-C male cable

Arm Cortex-M4 MCUs
MSP432E401Y SimpleLink™ 32-bit Arm Cortex-M4F MCU with ethernet, CAN, 1MB Flash and 256kB RAM


Buck converters (integrated switch)
LM62440-Q1 Automotive 3-V to 36-V, 4-A, low-noise synchronous step-down converter


Multi-channel ICs (PMICs)
LP87745 Three 3-A low-noise buck converter, I/O LDO and 5-V boost converter PMIC for industrial radar MMICs LP87745-Q1 Automotive three 3-A low-noise buck converter, IO LDO & 5-V boost converter PMIC for radar MMICs
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Evaluation board

LP877451Q1EVM — LP8774x-Q1 evaluation module for ADAS PMIC low-noise configuration 3-buck and 5-V boost

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GUI for evaluation module (EVM)

LP8774XXQ1EVM-GUI — LP8774xxQ1EVM Graphical User Interface

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Technical documentation

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Type Title Date
* User guide LP877451Q1EVM Evaluation Module User's Guide (Rev. A) PDF | HTML 02 Jun 2022
Certificate LP877451Q1EVM EU RoHS Declaration of Conformity (DoC) 27 Sep 2021

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