LM7705 Low Noise Negative Bias Generator

LM7705 - TI.com
LM7705 Datasheet

  • 3-5.25V input
  • -0.232V output
  • Maximum 26mA output current
  • Minimum implementation is part + 3 capacitors

Datasheet electrical characteristics are measured with:

  • CFly: 5 µF
  • CRes: 22 µF
  • COut: 22 µF

Notes:

  • Supply voltage below 3.3V decreases performance
  • Can sink more than 26mA, but output voltage will start shifting towards ground
  • Datasheet recommends decoupling on Vdd
  • Output voltage noise can be suppressed by “using a small RF capacitor, will a value of, for example, 100 nF.”