GENERAL DESCRIPTION
The ADP7104 is a CMOS, low dropout linear regulator that operates from 3.3 V to 20 V and provides up to 500 mA of output current. This high input voltage LDO is ideal for regulation of high performance analog and mixed signal circuits operating from 19 V to 1.22 V rails. Using an advanced proprietary architecture, it provides high power supply rejection, low noise, and achieves excellent line and load transient response with just a small 1 µF ceramic output capacitor.

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, VOUT = 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%/+1%
   Low quiescent current (VIN = 5 V), IGND= 900 μA with 500 mA load
   Low shutdown current: <40 µA at VIN = 12 V, stable with small
      1 µF ceramic output capacitor
   7 fixed output voltage options: 1.5 V, 1.8 V, 2.5 V, 3 V, 3.3 V,
      5 V, and 9 V
   Adjustable output from 1.22 V to VIN − VDO
   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 to noise sensitive applications: ADC, DAC circuits,
      precision amplifiers, high frequency oscillators, clocks,
      and PLLs
   Communications and infrastructure
   Medical and healthcare
   Industrial and instrumentation