ADP2108:  600 mA, 3 MHz Fast Transient Synchronous Step-Down Converter

The ADP2108 is a high efficiency, low quiescent current stepdown dc-to-dc converter in ultrasmall WLCSP package. The total solution only requires three tiny external components. It uses a proprietary ...More

ADP2108:  600 mA, 3 MHz Fast Transient Synchronous Step-Down Converter

Product Description

The ADP2108 is a high efficiency, low quiescent current stepdown dc-to-dc converter in ultrasmall WLCSP package. The total solution only requires three tiny external components. It uses a proprietary high speed current mode, constant frequency PWM control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2108 has a power saving, pulse frequency modulation (PFM) mode that reduces the switching frequency under light load conditions.

The ADP2108 runs from input voltages from 2.3 V to 5.5 V allowing single Li+/Li− polymer cell, multiple alkaline/NiMH cell, PCMCIA, and other standard power sources. The ADP2108 is available in fixed output voltages of 3.3 V, 3.0 V, 2.5 V, 2.3 V, 1.8 V, 1.5 V, 1.3 V, 1.2 V, 1.1 V, and 1.0V. All versions include internal power switch and synchronous rectifier for minimal external part count and high efficiency. ADP2108 has an internal soft start and is internally compensated. During logic controlled shutdown, the input is disconnected from the output and it draws less than 0.1 A from the input source. Other key features include under-voltage lockout to prevent deep battery discharge and soft start to prevent input current overshoot at startup. The ADP2108 is available in a 5-ball WLCSP.

Applications

  • PDAs and palmtop computers
  • Wireless handsets
  • Digital audio, portable media players
  • Digital cameras, GPS navigation units

    • Data Sheet, Rev. PrA, 5/08

    Features

    • 3 MHz fixed frequency operation
    • Extremely low Iq: 19 µA
    • Up to 600 mA output current
    • Input voltage 2.3 V to 5.5 V
    • Uses tiny multilayer inductors and capacitors
    • Current mode architecture for fast load and line transient response
    • 100% duty cycle low-dropout mode
    • See Data Sheet for Additional Information

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    Part# Vout Preset Vout Adj Range Iout (max) Vin Range (Vmin to Vmax) Supply Current (max) Vdropout @ Rated Iout Vout Setpoint Acc Vout Total Acc Shutdown Product Description Pos Supply Operating Temp Range Price* (1000-4999)
    ADP120 16 Presets From 1.2-3.3V n/a 100mA 2.3 to 5.5 35µA 60mV to 80mV 1% @ Iout = 10mA 2% @ 10 mA - Iout max Yes 100 mA, Low Quiescent Current, CMOS Linear Regulator +2.3 to +5.5 -40 to +125 $0.26
    ADP121 16 Presets From 1.2-3.3V n/a 150mA 2.5 to 5.5 40µA 90mV to 120mV 1% @ Iout = 10mA 2% @ 10 mA - Iout max Yes 150 mA, Low Quiescent Current, CMOS Linear Regulator in 5-Lead TSOT +2.3 to +5.5 -40 to +125 $0.27
    ADP130 31 Presets From 0.8-3.0V n/a 350mA 1.2 to 3.6 220µA 70mV 1% @ Iout = 10mA 2% @ 1 mA - Iout max Yes 350 mA, Low VIN, Low Quiescent Current, CMOS Linear Regulator +1.2 to +3.6 -40 to +125 $0.33
    ADP1707 16 Presets From 0.75-3.3V, With Tracking n/a 1A 2.5 to 5.5 1.55mA 345mV to 365mV 1% @ Iout = 10mA 1.5% @ 0.1 mA - Iout max Yes 1 A, Low Dropout, CMOS Linear Regulator +2.5 to +5.5 -40 to +125 $1.12
    ADP1708 n/a 0.8V to 5.0V 1A 2.5 to 5.5 1.55mA 345mV to 365mV n/a 1.5% @ 0.1 mA - Iout max Yes 1 A, Low Dropout, CMOS Linear Regulator +2.5 to +5.5 -40 to +125 $1.09
    ADP1740 7 Presets--0.75 to 2.5V n/a 2A 1.6 to 3.6 - 200mV 1% @ Iout = 10mA 1.5% @ 0.1 mA - Iout max Yes 2 A, Low Dropout, CMOS Linear Regulator +1.6 to +3.6 -40 to +125 -
    ADP1741 n/a 0.75V to 3.0V 2A 1.6 to 3.6 - 200mV - - Yes 2 A, Low Dropout, CMOS Linear Regulator with Adj. Output +1.6 to +3.6 -40 to +125 -
    ADP1710 16 Presets From 0.75-3.3V 0.8V to 5.0V 150mA 2.5 to 5.5 1.3mA 150mV to 180mV 1% @ Iout = 1mA 2% @ 0.1 mA - Iout max Yes 150 mA, Low Dropout, CMOS Linear Regulator +2.5 to +5.5 -40 to +125 $0.41
    ADP1711 16 Presets From 0.75-3.3V n/a 150mA 2.5 to 5.5 1.3mA 150mV to 180mV 1% @ Iout = 1mA 2% @ 0.1 mA - Iout max Yes 150 mA, Low Dropout, CMOS, Linear Regulator +2.5 to +5.5 -40 to +125 $0.45
    ADP1712 16 Presets From 0.75-3.3V 0.8V to 5.0V 300mA 2.5 to 5.5 420µA 200mV to 400mV 1% @ Iout = 10mA 2% @ 0.1 mA - Iout max Yes 300 mA, Low Dropout, CMOS, Linear Regulator w/ fixed or adj output voltage +2.5 to +5.5 -40 to +125 $0.47
    ADP1713 16 Presets From 0.75-3.3V n/a 300mA 2.5 to 5.5 420µA 170mV to 200mV 1% @ Iout = 10mA 2% @ 0.1 mA - Iout max Yes 300 mA, Low Dropout, CMOS, Low Noise Linear Regulator +2.5 to +5.5 -40 to +125 $0.49
    ADP1714 16 Presets From 0.75-3.3V n/a 300mA 2.5 to 5.5 420µA 170mV to 200mV 1% @ Iout = 10mA 2% @ 0.1 mA - Iout max Yes 300 mA, Low Dropout, CMOS Linear Regulator w/ External-Voltage Tracking Capability +2.5 to +5.5 -40 to +125 $0.51
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