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ADP1864:  Constant Frequency Current-Mode Step-Down DC-to-DC Controller in TSOT

Product Status:Production
Data
Sheet
ADP1864 Data Sheet Rev C, 08/2012 (pdf 314kB)

Product Details

Product Status:Production
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The ADP1864 is a compact, inexpensive, constant-frequency current-mode step-down dc-to-dc controller. The ADP1864 drives a P-channel MOSFET that regulates an output voltage as low as 0.8 V with ±2% accuracy, for up to 5 A load currents, from input voltages as high as 14 V.

The ADP1864 provides system flexibility by allowing accurate setting of the current limit with an external resistor, and the output voltage is easily adjustable using two external resistors. The ADP1864 includes an internal soft start to allow quick power-up while preventing input inrush current. Additional safety features include short-circuit protection, output overvoltage protection, and input undervoltage protection. Current-mode control provides fast and stable load transient performance, while the 580 kHz operating frequency allows a small inductor to be used in the system. To further the life of a battery source, the controller turns on the external P-channel MOSFET 100% of the duty cycle during dropout.

The ADP1864 operates over the −40°C to +125°C temperature range and is available in a small, low profile, 6-lead TSOT package.

Applications

  • Wireless devices
  • 1- to 3-cell Li-Ion battery-powered applications
  • Set-top boxes
  • Processor core power supplies
  • Hard disk drives

    • Data Sheet, Rev. A, 2/07

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    Product Updates: Notify Me

    FEATURES and BENEFITS

    • Wide input voltage range: 3.15 V to 14 V
    • Wide output voltage range: 0.8 V to input voltage
    • Pin-to-pin compatible with LTC1772, LTC3801
    • Up to 94% efficiency
    • 0.8 V ± 1.25% reference accuracy over temperature
    • Internal soft start
    • 100% duty cycle for low dropout voltage
    • Current-mode operation for good line and load transient response
    • 7 μA shutdown current
    • 235 μA quiescent supply current
    • Short-circuit and overvoltage protection
    • Small 6-lead TSOT package

    Typical Application Circuit Diagram for ADP1864

    ADP1864 Diagram
    Typical Applications and Other Diagrams

    Documentation

    Title Content Type File Type
    ADP1864: Constant Frequency Current-Mode Step-Down DC-to-DC Controller in TSOT Data Sheet (Rev C, 08/2012) (pdf, 314 kB) Data Sheets PDF
    CN-0190: Robust, Multivoltage, High Efficiency, 25 W Universal Power Supply Module with 6 V to 14 V Input  (pdf, 357 kB) Circuit Note PDF
    Power Distribution for High Performance Medical Imaging Systems Technical Articles HTML
    ADP1864 & ADP1611 Reference Design  (pdf, 123 kB)
    Input Voltage 5V ± 5%; Generates two voltages: An adjustable negative voltage that tracks an adjustable positive voltage; Output Voltage: -7V to -12V and +7 to +12V; Single resistor value change for each supply will adjust the output voltages; Both Voltages capable of providing 150mA of output current     		Power Reference Designs PDF
    ADP1829 & ADP1864 Reference Design  (pdf, 142 kB)
    Three Output Voltages: 1.24 V, 3.3 V, 5 V; Output Current: 2 A to 4 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    System-ready D/A Converters Combine Accuracy with Integrated Precision Reference Conditioning Circuitry (05 Dec 2011) Press Releases HTML
    DC-to-DC Switching Regulator IC Solutions (10/06)  (pdf, 3205 kB) Overview PDF
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Design Tools,Models,Drivers & Software

    Title Content Type File Type
    Download files for ADIsimPower™ Voltage Regulator Design Tool
    The individual Excel-based voltage regulator design tools used in ADIsimPower™.     		ADIsim Design/Simulation Tools HTML
    Enter values and click on ADIsimPower to find power management solutions. Launch of ADIsimPower Voltage Regulator Design Tool
    Available System Voltage Operating Voltage Rail Load Current
    Vin (min) V Vin (max) V Vout V Iout A

    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

    Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

    Product Recommendations & Reference Designs

    Engineered. Tested. Ready to Integrate.
    Learn More
    Updated 07/2011
    Circuit Note PDF

    CN0190:Robust, Multivoltage, High Efficiency, 25 W Universal Power Supply Module with 6 V to 14 V Input

    Benefits & Features
    • 12 different voltage and current output conditions
    • Configure the all other channels to be powered off
    Products Used view all

    HARDWARE BLOCK DIAGRAM

    Available Design Resources

    CN0190:Robust, Multivoltage, High Efficiency, 25 W Universal Power Supply Module with 6 V to 14 V Input

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    Price, packaging, availability

    Price Table Help

    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.

    ezLINX™ iCoupler® Isolated Interface Development Environment
    Model Description Price RoHS View PCN/ PDN Check Inventory/
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    EZLINX-IIIDE-EBZ Status: Production iCoupler® Isolated Interface Development Environment Evaluation Board $149.00 Yes -

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    ADP1864 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP1864-EVALZ Status: Production Evaluation Board $60.72 Yes -

    Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.

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