Small Size, Low Noise and High PSRR Power Reference Design for CMOS Image Sensors
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Key Document


The TIDA-00718 reference design provides a small size and high input voltage ripple rejection power supply to provide a stable and clean voltage source for CMOS image sensors. In this design a main power rail of 5 V from battery, Power over Ethernet (PoE) or DC adaptor is regulated down to three voltage rails: 3.3 V, 1.8 V and 1.2 V.

This solution can be utilized in consumer electronics and commercial applications as IP Network Cameras, Analog Security Camera, Video Doorbell, Internet webcam and many more.

  • Great transient response
  • Ripple free 1.8 V and 1.2 V voltage rails
  • Small form factor solution
  • Cost efficient solution with only a few compensation components
  • TIDA-00718 provides design guide and design files of the power management section.

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Schematic/Block Diagram

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Design Guide

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Design Files

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TI Devices (2)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
LM3281  3.3-V, 1.2-A, 6-MHz Mini Step-Down DC-DC Converter  Step-down (buck)  Sample & Buy View Design Kits & Evaluation Modules
LP5907  250-mA ultra-low-noise low-IQ low-dropout (LDO) linear regulator  Power management  Sample & Buy View Design Kits & Evaluation Modules

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
LP5907 Download Download
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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 1203 22 Sep 2015
Design files (5)
Title Type Size (KB) Date
ZIP 382 10 Dec 2015
PDF 593 10 Dec 2015
PDF 96 10 Dec 2015
PDF 209 10 Dec 2015
PDF 224 10 Dec 2015

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