GENERAL DESCRIPTION
The ADP320 200 mA triple output LDO combines high PSRR, low noise, low quiescent current, and low dropout voltage in a voltage regulator ideally suited for wireless applications with demanding performance and board space requirements.
The low quiescent current, low dropout voltage, and wide input voltage range of the ADP320 triple LDO extend the battery life of portable devices. The ADP320 triple LDO maintains power supply rejection greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP320 triple LDO offers much lower noise performance than competing LDOs without the need for a noise bypass capacitor.

FEATURES
   Bias voltage range (VBIAS): 2.5 V to 5.5 V
   LDO input voltage range (VIN1/VIN2, VIN3): 1.8 V to 5.5 V
   Three 200 mA low dropout voltage regulators
   16-lead, 3 mm × 3 mm LFCSP
   Initial accuracy: ±1%
   Stable with 1 µF ceramic output capacitors
   No noise bypass capacitor required
   3 independent logic controlled enables
   Over current and thermal protection
   Key specifications
      High PSRR
         76 dB PSRR up to 1 kHz
         70 dB PSRR 10 kHz
         60 dB PSRR at 100 kHz
         40 dB PSRR at 1 MHz
      Low output noise
         24 µV rms typical output noise at VOUT = 1.2 V
         43 µV rms typical output noise at VOUT = 2.8 V
   Excellent transient response
   Low dropout voltage: 110 mV @ 200 mA load
   85 µA typical ground current at no load, all LDOs enabled
   100 µs fast turn-on circuit
   Guaranteed 200 mA output current per regulator
   −40°C to +125°C junction temperature

APPLICATIONS
   Mobile phones
   Digital cameras and audio devices
   Portable and battery-powered equipment
   Portable medical devices
   Post dc-to-dc regulation