ADP2102 Low Duty Cycle, 600 mA, 3 MHz Synchronous Step-Down DC-to-DC Converter

The ADP2102 is a synchronous step-down dc-to-dc converter that converts a 2.7 V to 5.5 V unregulated input voltage to a lower regulated output voltage with up to 95% efficiency and 1% accuracy. The low duty cycle capability of the ADP2102 is ideal for USB applications or 5 V systems that power up submicron subvolt processor cores. Its 3 MHz typical operating frequency and excel-lent transient response allow the use of small, low cost 1 μH inductors and 2.2 μF ceramic capacitors. At medium-to-high load currents, it uses a current mode, pseudofixed frequency pulse-width modulation to extend battery life. To ensure the longest battery life in portable applications, the ADP2102 has a power save mode (PSM) that reduces the switching frequency under light load conditions to significantly reduce quiescent current.

The ADP2102 is available in both fixed and adjustable output voltage options with 600 mA maximum output current. The preset output voltage options voltage are 1.875 V, 1.8 V, 1.5 V, 1.375 V, 1.25 V, 1.2 V, 1.0 V, and 0.8 V. The adjustable voltage option is available from 0.8 V to 3.3 V. The ADP2102 requires only three external components and consumes 0.01 μA in shutdown mode.

The ADP2102 is available in an 8-lead LFCSP package and is specified for the −40 °C to +85 °C temperature range.

Applications
  • USB powered devices
  • WLAN and gateways
  • Point of loads
  • Processor core power from 5 V
  • Digital cameras
  • PDAs and palmtop computers
  • Portable media players, GPS
Features and Benefits
  • Input voltage range: 2.7 V to 5.5 V
  • 600 mA maximum load current
  • 95% efficiency
  • Low duty cycle operation
  • Only 3 tiny external ceramic components
  • 3 MHz typical operating frequency
  • Fixed output voltage of 1.2 V or 1.375 V
  • Adjustable output voltage up to 3.3 V
  • 0.01 µA shutdown supply current
  • Automatic power save mode
  • Internal synchronous rectifier
  • Internal soft start
  • Internal compensation
  • Enable/shutdown logic input
  • Undervoltage lockout
  • Current limit protection
  • Thermal shutdown
  • Small 8-lead, 3 mm × 3 mm LFCSP
  • Power Management
    Design Tools
    Data Sheets
    Documentnote
    ADP2102: Low Duty Cycle, 600 mA, 3 MHz, Synchronous Step-Down DC-to-DC Converter Data Sheet (Rev. C)PDF 729.7 K
    Product Highlight
    Documentnote
    DC-to-DC Switching Regulator IC Solutions (10/06)PDF 3205 kB
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    ADP2102YCPZ-1.2-R7 Production8 ld LFCSP (3x3mm 1.74x1.45mm EP)REEL 1500-40 to 85C01.23Y
    ADP2102YCPZ-1.37R7 Production8 ld LFCSP (3x3mm 1.74x1.45mm EP)REEL 150001.23Y
    ADP2102YCPZ-3-R7 Last Time Buy8 ld LFCSP (3x3mm 1.74x1.45mm EP)REEL 1500-40 to 85C01.23Y
    ADP2102YCPZ-4-R7 Production8 ld LFCSP (3x3mm 1.74x1.45mm EP)REEL 1500-40 to 85C01.23Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    ADP2102-0.8-EVALZEvaluation Board60.72Y
    ADP2102-1.0-EVALZEvaluation Board60.72Y
    ADP2102-1.25-EVALZEvaluation Board60.72Y
    ADP2102-1.2-EVALZEvaluation Board60.72Y
    ADP2102-1.375EVALZEvaluation Board60.72Y
    ADP2102-1.5-EVALZEvaluation Board60.72Y
    ADP2102-1.875EVALZEvaluation Board60.72Y
    ADP2102-1.8-EVALZEvaluation Board60.72Y
    ADP2102-1-EVALZEvaluation Board60.72Y
    ADP2102-2-EVALZEvaluation Board60.72Y
    ADP2102-3-EVALZEvaluation Board60.72Y
    ADP2102-4-EVALZEvaluation Board60.72Y
    Reference Materials
    ADP2102: Low Duty Cycle, 600 mA, 3 MHz, Synchronous Step-Down DC-to-DC Converter Data Sheet (Rev. C) adp2102
    ADP21xx Buck Regulator Design Tool adp2105
    DC-to-DC Switching Regulator IC Solutions (10/06) adp1111
    ADP1829, ADP210x, ADP171x Reference Design adp2105
    ADP1829, ADP210x and ADP171x Reference Design adp2105