The RAA271050 is an automotive grade (AEC Q-100 Grade 1, ASIL C) 4A synchronous step down voltage regulator with integrated high-side and low-side MOSFETs. The output voltage of this buck regulator is fixed to either 5.0V/3.3V. With an input voltage range of 4.5V to 42V it provides a high-efficiency solution for a variety of point of load applications. The RAA271050 works as a primary regulator and companion product with the RAA271000 system PMIC, whose target application is the R-Car V3H processor, where a high performance complete power solution is required.


  • AEC-Q100 qualified, Grade 1: -40°C to +125°C
  • Supports ASIL C Systems
  • VIN operating range from 4.0V to 42V
  • VOUT = 5.0V or 3.3V (factory programmable)
  • High efficiency synchronous buck regulator with efficiency up to:
    • 95%; VIN = 12V; VOUT = 5V; F = 440kHz
    • 92%; VIN = 12V; VOUT = 5V; F = 2.2MHz
  • 2% VOUT accuracy over temperature, load, line
  • Factory programmable soft-start
  • Soft-stop output discharge during disable
  • RSTb output which doubles as Monitor fault or Buck Fault Indicator
  • Fixed switching frequency: 2.2MHz or 440kHz
  • Spread Spectrum Modulation (SSM), pseudo-random frequency and dwell time
    • Enable/disable
    • Frequency modulation ±1%, ±2%, ±3%,
    • Upward/centered/downward modulation
  • Boot UVLO


  • Automotive vision systems
  • Automotive LIDAR systems
  • Automotive ADAS systems
  • Automotive Integrated Cockpit systems
  • Ideal Pre-Regulator for the RAA271000 PMIC


Title language Type Format File Size Date
Datasheets & Errata
star RAA271050 Short-Form Datasheet Datasheet - Short-form PDF 325 KB

memoryBoards & Kits

Part Number Title Type Company
EagleCAM EagleCAM Smart Camera Platform by LUPA Development LUPA-Electronics GmbH