ADP2107 2 Amp Synchronous, Step-Down DC-to-DC Converter

The ADP2105 / ADP2106 / ADP2107 are low quiescent current, synchronous, step-down dc-to-dc converters in a compact 4 mm × 4 mm LFCSP package. At medium to high load currents, these devices use a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2105 / ADP2106 / ADP2107 use a pulse frequency modulation (PFM) control scheme under light load conditions that reduces switching frequency to save power.

The ADP2105 / ADP2106 / ADP2107 run from input voltages of 2.7 V to 5.5 V, allowing single Li+/Li− polymer cell, multiple alkaline/NiMH cells, PCMCIA, and other standard power sources. The output voltage of ADP2105 / ADP2106 / ADP2107 is adjustable from 0.8 V to the input voltage (indicated by ADJ), whereas the ADP2105 / ADP2106 / ADP2107 are available in preset output voltage options of 3.3 V, 1.8 V, 1.5 V, and 1.2 V (indicated by x.x V). Each of these variations is available in three maximum current levels: 1 A (ADP2105), 1.5 A (ADP2106), and 2 A (ADP2107). The power switch and synchronous rectifier are integrated for minimal external part count and high efficiency. During logic controlled shutdown, the input is disconnected from the output, and it draws less than 0.1 µA from the input source. Other key features include undervoltage lockout to prevent deep battery discharge and programmable soft start to limit inrush current at startup.

Applications

Features and Benefits
  • Extremely high 97% efficiency
  • Ultralow quiescent current: 20 μA
  • 1.2 MHz switching frequency
  • 0.1 μA shutdown supply current
  • Maximum load current: 2 A
  • Input voltage: 2.7 V to 5.5 V
  • Output voltage: 0.8 V to VIN
  • Maximum duty cycle: 100%
  • Smoothly transitions into low dropout (LDO) mode
  • Internal synchronous rectifier
  • Small 16-lead 4 mm × 4 mm LFCSP package
  • Optimized for small ceramic output capacitors
  • Enable/shutdown logic input
  • Undervoltage lockout
  • Soft start
  • Supported by ADIsimPower™ design tool
  • Power Management
    Design Tools
    Data Sheets
    Documentnote
    ADP2105/ADP2106/ADP2107: 1 Amp/1.5 Amp/2 Amp Synchronous, Step-Down DC-to-DC Converters Data Sheet (Rev. E)PDF 1 M
    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
    ADP2107ACPZ-1.2-R7 Last Time Buy16 ld LFCSP (4x4x.85mm, 2.10mm exposed pad)REEL 1500-40 to 125C01.32Y
    ADP2107ACPZ-1.5-R7 Last Time Buy16 ld LFCSP (4x4x.85mm, 2.10mm exposed pad)REEL 1500-40 to 125C01.32Y
    ADP2107ACPZ-1.8-R7 Production16 ld LFCSP (4x4x.85mm, 2.10mm exposed pad)REEL 1500-40 to 125C01.32Y
    ADP2107ACPZ-3.3-R7 Production16 ld LFCSP (4x4x.85mm, 2.10mm exposed pad)REEL 1500-40 to 125C01.32Y
    ADP2107ACPZ-R7 Production16 ld LFCSP (4x4x.85mm, 2.10mm exposed pad)REEL 1500-40 to 125C01.32Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    ADP2107-1.8-EVALZEvaluation Board60.72Y
    ADP2107-EVALZEvaluation Board60.72Y
    Reference Materials
    ADP2105/ADP2106/ADP2107: 1 Amp/1.5 Amp/2 Amp Synchronous, Step-Down DC-to-DC Converters Data Sheet (Rev. E) adp2105
    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