ADP3309 anyCAP® 100 mA Low Dropout Linear Regulator

The ADP3309 is a member of the ADP330x family of precision low dropout anyCAP voltage regulators. It is pin-for-pin and functionally compatible with National’s LP2981, but offers performance advantages. The ADP3309 stands out from conventional LDOs with a novel architecture and an enhanced process. Its patented design requires only a 0.47 μF output capacitor for stability. This device is stable with any type of capacitor regardless of its equivalent series resistance (ESR) value, including ceramic types for space restricted applications. The ADP3309 achieves ±1.2% accuracy at room temperature and ±2.2% overall accuracy over temperature, line, and load regulations. The dropout voltage of the ADP3309 is only 120 mV (typical) at 100 mA. This device also includes a current limit and a shutdown feature. In shutdown mode, the ground current is reduced to ~1 μA.

The ADP3309 operates with a wide input voltage range from 2.8 V to 12 V and delivers a load current in excess of 100 mA. The ADP3309 anyCAP LDO offers a wide range of output voltages.

Applications
  • Cellular telephones
  • Notebook, palmtop computers
  • Battery-powered systems
  • PCMCIA regulator
  • Bar code scanners
  • Camcorders, cameras
Features and Benefits
  • ±1.2% accuracy over line and load regulations @ 25°C
  • Ultralow dropout voltage: 120 mV typical @ 100 mA
  • Requires only COUT = 0.47 μF for stability
  • anyCAP LDOs are stable with all types of capacitors (including MLCC)
  • Current and thermal limiting
  • Low noise
  • Low shutdown current: 1 μA
  • 2.8 V to 12 V supply range
  • −20°C to +85°C ambient temperature range
  • Several fixed voltage options
  • Ultrasmall 5-lead SOT-23 package
  • Excellent line and load regulations
    • Power Management
    Design Tools
    Data Sheets
    Documentnote
    ADP3309: anyCAP 100 mA Low Dropout Linear Regulator Data Sheet (Rev. C)PDF 341 kB
    Application Notes
    Documentnote
    AN-1072: How to Successfully Apply Low Dropout RegulatorsPDF 105 kB
    AN-262: Low-Noise Low Drop-Out Regulator for Portable EquipmentPDF 341 kB
    Frequently Asked Questions
    Documentnote
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    ADP3309ARTZ-2.5RL7 Production5 ld SOT-23REEL 3000-20 to 85C00.76Y
    ADP3309ARTZ-3.3-R7 Production5 ld SOT-23REEL 3000-20 to 85C00.76Y
    ADP3309ARTZ-3.6-R7 Production5 ld SOT-23REEL 3000-20 to 85C00.76Y
    ADP3309ARTZ-3REEL7 Last Time Buy5 ld SOT-23REEL 3000-20 to 85C00.76Y
    ADP3309: anyCAP 100 mA Low Dropout Linear Regulator Data Sheet (Rev. C) adp3309
    ADI Linear Regulator Design Tool and Parametric Search adp2108
    AN-1072: How to Successfully Apply Low Dropout Regulators adp2108
    AN-1072: 在系统中成功运用低压差稳压器 (Rev. 0) adp2108
    AN-262: Low-Noise Low Drop-Out Regulator for Portable Equipment adp3301
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