Low Noise, High PSRR, Replica LDO

Product No: WEALDORP1812NI08SFN22M22G Download 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 WEALDORP1812NI08SFN22M22G  is a voltage regulator operating from 1.8 V and 1.2 V power supplies. The WEALDORP1812NI08SFN22M22G  provides two 0.8 V outputs. The outA output has double current driving capability compared to outB. Due to poor dc-line regulation the accuracy of the output voltage can be calibrated through a 4 bit binary control when the load current varies under a wide range.

Key Features
  • Power Supplies : 1.2 V, 1.8 V
  • Output voltage : 0.8  V
  • Quiescent current: 7.3 mA
  • Maximum current: 74.8 mA
  • Reference Voltage: 0.8 V
  • PSRR (1): 70 dB @1 KHz, 1.8 V,65 dB @1 KHz, 1.2 V
  • PSRR (1): 48 dB @1 MHz,1.8 V,20 dB @1 MHz,1.2 V
  • Noise @1KHz: -145 dBV/sqrt (Hz)
  • (53 nV/sqrt (Hz))
  • Noise @1MHz: -174 dBV/sqrt (Hz)
  • (1.9 nV/sqrt (Hz))
  • Bandwidth: 6.86 KHz
  • Drop-out voltage: 3.8 uV (vdd12 : 1 V – 1.2 V)
  • Load regulation:
  • -3.6 mV/mA Iload from 0-60mA (-2.6 mV/mA Iload close to 20mA)
  • WakeUp Time : 11 ns
  • Area : 280 um x 170 um
  • Process : 22FDX
  • Metal Option : 19

(1)Filter: R=10Kohm, C=81pF

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