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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_VQ 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 ...More

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

Product Description

The ADP2105/ADP2106/ADP2107 are low quiescent current, synchronous, step-down dc-to-dc converters in a compact 4 mm × 4 mm LFCSP_VQ 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-ADJ is adjustable from 0.8 V to the input voltage, whereas the ADP2105/ADP2106/ADP2107-xx are available in preset output voltage options of 3.3 V, 1.8 V, 1.5 V, and 1.2 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

  • Mobile handsets
  • Portable media players
  • PDAs and palmtop computers
  • Telecommunication/networking equipment
  • Set top boxes
  • Audio/video consumer electronics

    • Data Sheet, Rev. A, 3/07

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    • Extremely high 97% peak efficiency
    • Internal primary and synchronous switches
    • Fixed Frequency, Peak Current-Mode PWM at medium and high loads
    • PFM operation at light loads for high efficiency
    • Ultralow quiescent current: 30μA (max)
    • Internally Set Current Limit
    • Internal Thermal Protection
    • 0.1 μA shutdown supply current (typ)
    • Maximum duty cycle 100%
    • Smoothly transitions into low dropout (LDO) mode
    • Small 16-lead 4 mm × 4 mm LFCSP_VD package
    • Optimized for small ceramic output capacitors
    • Vin Range: 2.7V-5.5V
    • Boost: No
    • Buck: Yes
    • Inverting: No
    • Iout (max): 2A
    • Supply Current : 30µA
    • Switching Frequency: 1.2 MHz
    • Vout Preset Summary: 4 Options/1.2V-3.3V
    • Vout Adj Options: 0.8V to Vin

    Typical Application Circuit for ADP2107

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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.