ADP2108:  Compact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter

The ADP2108 is a high efficiency, low quiescent current step-down dc-to-dc converter in an ultrasmall 5-ball WLCSP package. The total solution requires only three tiny external components. It uses a ...More

ADP2108:  Compact, 600 mA, 3 MHz, Step-Down DC-to-DC Converter

Product Description

The ADP2108 is a high efficiency, low quiescent current step-down dc-to-dc converter in an ultrasmall 5-ball WLCSP package. The total solution requires only 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 save mode that reduces the switching frequency under light load conditions.

The ADP2108 runs on input voltages of 2.3 V to 5.5 V, which allows for single lithium or lithium polymer cell, multiple alkaline or NiMH cell, PCMCIA, USB, and other standard power sources. The maximum load current of 600 mA is achievable across the input voltage range.

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

    • Peak efficiency: 95%
    • 3 MHz fixed frequency operation
    • Typical quiescent current: 18 μA
    • Maximun load current: 600 mA
    • 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
    • Internal synchronous rectifier
    • Internal compensation
    • Internal soft start
    • See Data Sheet for Additional Information

    Diagrams

    Functional Block diagram for ADP2108
    Functional Block diagram for ADP2108

    技术指标

    Vin Range 2.3V-5.5V
    Boost Yes
    Buck Yes
    Inverting No
    Iout (max) 0.6A
    Supply Current (max) 19µA
    Switching Frequency 3 MHz
    Vout Preset Summary 11 Options/1V-3.3V
    Vout Adj Options ---

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    订阅新产品资料
    Part# Vin Range Vout Preset Summary Vout Adj Options Iout (max) Isw (Peak) Supply Current (max) Switching Frequency Step Down Step Up Inverting Pkg Product Description Price* (1000-4999) Pos Supply
    ADP1111 2V-30V 3 Options/3.3V-12V 1.2V to 30V, 1.2V to Vin 1.5A 1.5A 110µA 70 kHz Yes Yes Yes Plastic DIP-8, SOIC-8 Micropower Step Up/Down/Inverting Switching Regulator; Adjustable or Fixed 3.3V, 5V, 12V $2.05 +2 to +30
    ADP2108 2.3V-5.5V 11 Options/1V-3.3V --- 0.6A 1.3A 19µA 3 MHz Yes Yes No WLCSP-5 600 mA, 3 MHz Fast Transient Synchronous Step-Down Converter $0.80 +2.3 to +5.5
    ADP2504 2.3V-5.5V 6 Options/2.8V-5V --- 1A 1.3A 38µA 2.5 MHz Yes Yes No LFCSP-10 1 Ampere, 2.5 MHz Buck-Boost DC-to-DC Converter $1.40 +2.3 to +5.5
    ADP1611 2.5V-5.5V - Vin to 20V 1.2A 1.2A 600µA 1.2 MHz - Yes - MSOP-8 20 V,1.2 MHz Step-Up DC-to-DC Switching Converter $1.20 +2.5 to +5.5
    ADP1610 2.5V-5.5V - Vin to 12V 1.2A 1.2A 600µA 700 kHz or 1.2 MHz No Yes No MSOP-8 1.2 MHz DC-DC Step-Up (Boost) Switching Converter w/ Integrated Power Switch $1.12 +2.5 to +5.5
    ADP2102 2.7V-5.5V 8 Options/0.8V-1.875V 0.8V to 3.3V 0.6A 1A 99µA 3 MHz Yes No No LFCSP-8 3 MHz Synchronous Step-Down DC-to-DC Converter $1.23 +2.7 to +5.5
    ADP3051 2.7V-5.5V --- 0.8V to 5.5V 0.5A 1A 300µA 550 kHz Yes No No MSOP-8 500 mA PWM Step-Down DC-DC Converter with Synchronous Rectifier $2.65 +2.7 to +5.5
    ADP2105 2.7V-5.5V 4 Options/1.2V-3.3V 0.8V to Vin 1A 1.5A 30µA 1.2 MHz Yes No No LFCSP-16 1A Synchronous Step-Down DC-DC Converter $1.13 +2.7 to +5.5
    ADP2106 2.7V-5.5V 4 Options/1.2V-3.3V 0.8V to Vin 1.5A 2.25A 30µA 1.2 MHz Yes No No LFCSP-16 1.5A Synchronous Step-Down DC-DC Converter $1.25 +2.7 to +5.5
    ADP2107 2.7V-5.5V