Low Noise, High PSRR, Replica LDO

Overview

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
  •  

Block Diagram

Low Noise, High PSRR, Replica LDO Block Diagram

Technical Specifications

Short description
Low Noise, High PSRR, Replica LDO
Vendor
Vendor Name
Foundry, Node
GLOBALFOUNDRIES, 22FDX
Maturity
GDS Ready
GLOBALFOUNDRIES
Pre-Silicon: 22nm FDX
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Semiconductor IP