ADP2503:  600 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 above, below, or equal to the regulated output voltage. The ...続きを見る

ADP2503:  600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter

製品概要

The ADP2503/ADP2504 are high efficiency, low quiescent current step-up/step-down dc-to-dc converters that can operate at input voltages above, below, or equal to the regulated output voltage. The power switches and synchronous rectifiers are internal to minimize external part count and maximize efficiency. At high load currents, the ADP2503/ADP2504 use a currentmode, fixed frequency PWM control scheme for excellent stability and transient response. To ensure the longest battery life in portable applications, the ADP2503/ADP2504 have an optional power-saving pulse skip mode that reduces the switching frequency under light load conditions to save power. For wireless and other low noise applications where variable frequency pulse skip mode may cause interference, a logic control input 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, making them ideal for single Li+/Li-polymer cell and multiple alkaline/NiMH cell applications where the output voltage is within the battery voltage range. The ADP2503/ ADP2504 have fixed output options ranging from 2.8 V to 5 V. 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. Other key features include under voltage 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. 0, 11/08

    Features

    • 1 mm height profile
    • Compact PCB footprint
    • Seamless transition between modes
    • 38 μA typical quiescent current
    • 2.5 MHz operation enables 1 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 information

    Diagrams

    Functional Block Diagram for ADP2503
    Functional Block Diagram for ADP2503

    仕様

    Vin Range 2.3V-5.5V
    Boost Yes
    Buck Yes
    Inverting No
    Iout (max) 0.6A
    Supply Current (max) 50µA
    Switching Frequency 2.5 MHz
    Vout Preset Summary 6 Options/2.8V-5V
    Vout Adj Options ---

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    ADP2503 - 600 mA, 2.5 MHz Buck-Boost DC-to-DC Converter

    新製品情報のRSSフィードを取得
    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