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

   ADP2108 WINS TOP 10 AWARD!

The ADP2108 is a high efficiency, low quiescent current step-down dc-to-dc converter manufactured in two different packages. 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 ...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 manufactured in two different packages. 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, 1.82 V, 1.8 V, 1.5 V, 1.3 V, 1.2 V, 1.1 V, and 1.0 V. All versions include an internal power switch and synchronous rect-ifier for minimal external part count and high efficiency. The ADP2108 has an internal soft start and is internally compensated. During logic controlled shutdown, the input is disconnected from the output and the ADP2108 draws less than 1 μA from the input source.

Other key features include undervoltage lockout to prevent deep battery discharge and soft start to prevent input current over-shoot at startup. The ADP2108 is available in 5-ball WLCSP and 5-lead TSOT packages. The ADP2109 provides the same features and operations as the ADP2108 and has the additional function of a discharge switch in the WLCSP package.

Applications

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

    • Data Sheet, Rev. C, 4/09

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    • Peak efficiency: 95%
    • 3 MHz fixed frequency operation
    • Typical quiescent current: 18 μA
    • Maximum 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 synchronous rectifier
    • Internal soft start
    • See data sheet for additional Information
    • Vin Range: 2.3V-5.5V
    • Boost: Yes
    • Buck: Yes
    • Inverting: No
    • Iout (max): 0.6A
    • Supply Current : 19µA
    • Switching Frequency: 3 MHz
    • Vout Preset Summary: 11 Options/1V-3.3V
    • Vout Adj Options: ---

    Typical Application Circuit for ADP2108

    OF NOTE ...

    2009 Top 10 Award For over 40 years ADI has been recognized as the innovation leader. This proud tradition continues today with the ADP2108 DC-to-DC Converter. The ADP2108 is the recipient of the prestigious 2009 Product of the Year Award presented by Electronic Products China.

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    Part# Vin Range Vout Preset Summary Vout Adj Options Iout (max) Isw (Peak) Supply Current Switching Frequency Step Down Step Up Inverting Pkg Product Description Price* (1000-4999) Pos Supply
    ADP1612 1.8V-5.5V --- Vin to 20V 1.4A 1.4A 900µA 650 KHz, 1.3 MHz No Yes No MSOP-8 650 kHz /1.3 MHz Step-Up DC-to-DC Converter $0.78 +1.8 to +5.5
    ADP1613 2.5V-5.5V --- Vin to 20V 2A 2A 900µA 650 kHz, 1.3 MHz No Yes No MSOP-8 650 kHz /1.3 MHz Step-Up DC-to-DC Converter $0.70 +2.5 to +5.5
    ADP2109 2.3V-5.5V 4 Options/1.0V-1.8V --- 0.6A 1.3A 18µA 3 MHz Yes No No WLCSP-5 Compact 600 mA, 3 MHz, Step-Down Converter w/ Output Discharge $0.70 +2.3 to +5.5
    ADP2121 2.3V-5.5V 4 Options/1.8V-1.875V --- 0.5A 1A 36µA 6 MHz Yes No No WLCSP-6 600 mA, 6 MHz, Synchronous, Step-Down, DC-to-DC Converter $0.80 +2.3 to +5.5
    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 $0.60 +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 - +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 - +2.7 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 4 Options/1.2V-3.3V 0.8V to Vin 2A 2.9A 30µA 1.2 MHz Yes No No LFCSP-16 2A Synchronous Step-Down DC-DC Converter $1.32 +2.7 to +5.5
    ADP2503 2.3V-5.5V 6 Options/2.8V-5V --- 0.6A 1A 38µA 2.5 MHz Yes Yes No LFCSP-10 600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter $1.30 +2.8 to +5.5
    ADP3050 3.6V-30V 2 Options/3.3V & 5V 1.25V to 12V 1A 1.5A 1.5mA 200 kHz Yes No No SOIC-8 200 kHz, 1 Amp, High-Voltage Step-Down Switching Regulator $1.81 +3.6 to +30
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    *The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.
    **Sample availability may be better than production availability. Please enter samples into your cart to check sample availability.