Low Noise, High PSRR Replica Voltage Regulator

Product No: WEALDO18NI12SFN32M22GDownload Datasheet

  • Applications:VCOs, PLLs, Power Supply Noise sensitive circuits. Circuits with low line regulation requirements
  • Maturity:GDS Ready
  • Foundry:GF
  • Geometry (nm):22nm
  • Process Node:22FDX

The WEALDO18NI12SFN32M22G is a voltage regulator operating from 1.8 V. It provides three output voltages 1.2 V driving output load that sinks specific current. The first output voltage applies to the VCO, the second drives the OutBuffer and the last one drives the digital circuitry.

Key Features
  • Power Supply : 1.8 V
  • Output voltage : 1.2  V
  • Quiescent current: 7.3 mA
  • Maximum current: 61 mA
  • Reference Voltage: 1.2 V
  • PSRR : 56 dB @1 KHz ,   32 dB @1 MHz
  • Noise @1KHz: -144 dBV/sqrt (Hz) ,(60 nV/sqrt (Hz))
  • Noise @1MHz: -178 dBV/sqrt (Hz), (1.2 nV/sqrt (Hz))
  • Bandwidth: 6.8 KHz
  • Drop-out voltage: 16 uV (vdd18 :1.6 V – 1.8 V)
  • Load regulation: -2.9 mV/mA Iload from 0-60mA , (-2 mV/mA Iload close to 20mA)
  • WakeUp Time (1) : 1.5 ns
  • Area : 400 um x 140 um
  • Process : 22FDX
  • Metal Option : 19

(1) Cload=10 pF

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