Features and Benefits

  • Fixed (ADP322) and adjustable output (ADP323) options
  • 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 (LDOs)
  • 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
  • Overcurrent and thermal protection
  • Key specifications
    • High PSRR
      • 76 dB PSRR up to 1 kHz
      • 70 dB PSRR at 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 at 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

Product Details

The ADP322/ADP323 200 mA triple output LDOs combine high PSRR, low noise, low quiescent current, and low dropout voltage to extend the battery life of portable devices and are ideally suited for wireless applications with demanding performance and board space requirements.

The ADP322/ADP323 PSRR is greater than 60 dB for frequencies as high as 100 kHz while operating with a low headroom voltage. The ADP322/ADP323 offer much lower noise performance than competing LDOs without the need for a noise bypass capacitor.

The ADP322/ADP323 are available in a miniature 16-lead, 3 mm × 3 mm LFCSP package and are stable with tiny 1 µF ±30% ceramic output capacitors providing the smallest possible board area for a wide variety of portable power needs.

The ADP322 is available in output voltage combinations ranging from 0.8 V to 3.3 V and offers overcurrent and thermal protection to prevent damage in adverse conditions. The ADP323 adjustable triple LDO can be configured for any output voltage between 0.5 V and 5 V with two resistors for each output.


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

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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