20 V, 500 mA, Low Noise LDO Regulator with Soft Start


FEATURES

Input voltage range: 3.3 V to 20 V
Maximum output current: 500 mA
Low noise: 15 µV rms for fixed output versions
PSRR performance of 60 dB at 10 kHz, V OUT  = 3.3 V
Reverse current protection
Low dropout voltage: 350 mV at 500 mA 
Initial accuracy: ±0.8%
Accuracy over line, load, and temperature: −2% to +1%
Low quiescent current: 900 μA at V IN  = 10 V, I OUT  = 500 mA
Low shutdown current: <50 µA at V IN  = 12 V, stable with  
      small 1 µF ceramic output capacitor
3 fixed output voltage options: 1.8, 3.3 V and 5 V
Adjustable output from 1.22 V to 19 V
Programmable soft start for inrush current control
Foldback current-limit and thermal overload protection
User programmable precision UVLO/enable
Power-good indicator
8-lead LFCSP and 8-lead SOIC packages

APPLICATIONS
Regulation of noise sensitive applications: ADC and DAC
        circuits, precision amplifiers, high frequency oscillators,
        clocks, and PLLs
Communications and infrastructure
Medical and healthcare
Industrial and instrumentation