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ADP2504:  1000 mA, 2.5 MHz Buck-Boost DC-to-DC Converter

The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages greater than, less than, or equal to the regulated output voltage. The power switches and synchronous rectifiers are internal to minimize external part count. At high load currents, the ADP2503/ADP2504 use a ...More

ADP2504:  1000 mA, 2.5 MHz Buck-Boost DC-to-DC Converter

Product Description

The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages greater than, less than, or equal to the regulated output voltage. The power switches and synchronous rectifiers are internal to minimize external part count. At high load currents, the ADP2503/ADP2504 use a current-mode, fixed frequency pulse-width modulation (PWM) control scheme for optimal stability and transient response. To ensure the longest battery life in portable applications, the ADP2503/ADP2504 have an optional power save mode that reduces the switching frequency under light load conditions. For wireless and other low noise applications where variable frequency power save mode may cause interference, the logic control input sync forces fixed frequency PWM operation under all load conditions.

The ADP2503/ADP2504 can run from input voltages between 2.3 V and 5.5 V, allowing single lithium or lithium polymer cell, multiple alkaline or NiMH cells, PCMCIA, USB, and other standard power sources. The ADP2503/ADP2504 have fixed output options, or using the adjustable model, the output voltage can be programmed through an external resistor divider. Compensation is internal to minimize the number of external components.

During logic-controlled shutdown, the input is disconnected from the output and draws less than 1 μA from the input source. Operating as boost converters, the ADP2503/ADP2504 feature a true load disconnect function that isolates the load from the power source. Other key features include undervoltage lockout to prevent deep battery discharge, and soft start to prevent input current overshoot at startup.

Applications

  • Wireless handsets
  • Digital cameras/portable audio players
  • Miniature hard disk power supplies
  • USB powered devices

    • Data Sheet, Rev. A, 08/09

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    • 1 mm height profile
    • Compact PCB footprint
    • Seamless transition between modes
    • 38 μA typical quiescent current
    • 2.5 MHz operation enables 1.5 μH inductor
    • Input voltage: 2.3 V to 5.5 V
    • Fixed output voltage: 2.8 V to 5.0 V
    • See data sheet for additional features
    • Vin Range: 2.3V-5.5V
    • Boost: Yes
    • Buck: Yes
    • Inverting: No
    • Iout (max): 1A
    • Supply Current : 38µA
    • Switching Frequency: 2.5 MHz
    • Vout Preset Summary: 6 Options/2.8V-5V
    • Vout Adj Options: ---

    ADP2504 Typical Application Circuit

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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.