Industry White Paper

Understanding Challenges in Powering High Resolution, High Frame Rate CMOS Image Sensors

May 20, 2022 by onsemi
Topics Covered
  • Pixels, Resolution, and Transistor Design
  • Frame and Row Transitions
  • Image Sensor Power Rails
  • Power Supply Rejection Ratio (PSRR)
  • LDO Output Noise (VRMS)

White Paper Overview 

Understanding critical challenges in powering today’s high resolution, high frame rate CMOS image sensors are the key elements in proposing an optimized power system solution with LDO (DC−DC, PMIC) that can meet the requirements of every design engineer.

Power system designers need to know how different the power solution is for, let’s say, an 8−megapixel (MP) versus a 50−MP camera, or how the frame rate (30 fps, 60 fps, 120 fps) changes their power design, what are the frequencies that need high PSRR, etc. This paper intends to highlight essential considerations before identifying a solution to power any of today’s image sensors.