42V Synchronous Buck Pre-Regulator and Safe Seven-Channel PMIC to Reduce Power Loss, System Cost, and Design Time

Published  March 31, 2021   0
Renesas’s R-Car V3H Power Solution

Renesas’s RAA271050 synchronous buck pre-regulator and RAA271000 safe seven-channel PMIC together can reduce power loss, system cost, and design time in systems based on the R-Car V3H system-on-chip (SoC) for advanced driver assistance systems (ADAS) automotive front cameras and driver monitor cameras.

42V RAA271050 synchronous buck pre-regulator accepts the vehicle’s 12V supply and steps it down to an intermediate supply voltage of 3.3V or 5.0V. The other device, RAA271000 General Purpose seven-channel PMIC (power management IC), then takes the RAA271050’s output and steps it down further to the various supply voltages needed by R-Car V3H and its peripherals such as LPDDR4 memory. 

This complete power and functional safety solution provide best-in-class efficiency, with power loss reductions of up to 33% compared to competitive PMICs. Lower power loss enables operation at higher temperatures, reducing cooling costs and delivering better reliability. Both the devices match R-Car requirements with no unnecessary overhead, reducing component cost and PCB area. These can support system safety requirements up to ASIL D and are developed per the ISO-26262 standard. The solution provides supply voltages with the current capability to meet all power specifications in R-Car V3H including sequence, voltage accuracy, and load step response. The solution provides all the necessary power and digital monitoring functions providing optimum safety.

Key Features of the R-Car V3H Power Solution

  • Programmable Output Voltage, Sequencing, I/O Configuration and Safety Configuration providing flexibility to support R-CAR V3H and an expansive range of SoCs
  • Integrated 12-bit SAR ADC with up to 16 external inputs monitors internal and external signals, eliminating the need for an added system ADC
  • Dynamic Voltage Frequency Scaling (DVFS) adjusts output voltage to minimize power consumption
  • Optional Spread Spectrum Clocking mitigates EMI
  • Built-in Support for R-Car V3H SoC Activation streamlines SoC self-test procedures

The devices RAA271050 and RAA271000 are included in a complete ADAS front camera solution featuring the EagleCam camera module from LUPA-Electronics GmbH and R-Car V3H and R-Car V3M system-on-chip (SoC) devices. This combination is an open, turnkey solution that delivers flexible, high-performance perception while shortening time to market and reducing the bill of materials (BOM) cost. 

The RAA271050 is offered in a 22-lead, 4x4mm QFN package, and the RAA271000 comes in a 60-ball FCBGA package with 0.8mm pitch. Both the devices are expected to be fully available in July 2021.

Add New Comment

Login to Comment Sign in with Google Log in with Facebook Sign in with GitHub