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ADP1829:  Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking

Product Status:Production
Data
Sheet
ADP1829 Data Sheet Rev C, 10/2012 (pdf 685kB)

Product Details

Product Status:Production
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The ADP1829 is a versatile, dual, interleaved, synchronous PWM buck controller that generates two independent output rails from an input of 3.0 V to 20 V, with power input voltage ranging from 1.0 V to 24 V. Each controller can be configured to provide output voltages from 0.6 V to 85% of the input voltage and is sized to handle large MOSFETs for point-of-load regulators. The two channels operate 180° out of phase, reducing stress on the input capacitor and allowing smaller, low cost components. The ADP1829 is ideal for a wide range of high power applications, such as DSP and processor core I/O power, and general-purpose power in telecommunications, medical imaging, PC, gaming, and industrial applications.

The ADP1829 operates at a pin-selectable, fixed switching frequency of either 300 kHz or 600 kHz, minimizing external component size and cost. For noise-sensitive applications, it can also be synchronized to an external clock to achieve switching frequencies between 300 kHz and 1 MHz. The ADP1829 includes soft start protection to prevent inrush current from the input supply during startup, reverse current protection during soft start for precharged outputs, as well as a unique adjustable lossless current-limit scheme utilizing external MOSFET sensing.

For applications requiring power supply sequencing, the ADP1829 also provides tracking inputs that allow the output voltages to track during startup, shutdown, and faults. This feature can also be used to implement DDR memory bus termination.

The ADP1829 is specified over the −40°C to +125°C junction temperature range and is available in a 32-lead LFCSP package.

Applications

  • Telecommunications and networking systems
  • Medical imaging systems
  • Base station power
  • Set-top boxes
  • Printers
  • DDR termination

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    FEATURES and BENEFITS

    • Fixed frequency operation: 300 kHz, 600 kHz, or synchronized operation up to 1 MHz
    • Supply input range: 3.0 V to 20 V
    • Wide power stage input range: 1 V to 24 V
    • Interleaved operation results in smaller, low cost input capacitor
    • All-N-channel MOSFET design for low cost
    • ±0.85% accuracy at 0°C to 70°C
    • Soft start, thermal overload, current-limit protection
    • 10 μA shutdown supply current
    • Internal linear regulator
    • Lossless RDSON current-limit sensing
    • Reverse current protection during soft start for handling precharged outputs
    • Independent Power OK outputs

    ADP1829 Functional Block Diagram

    ADP1829 Functional Block Diagram

    Documentation

    Title Content Type File Type
    ADP1829: Dual, Interleaved, Step-Down DC-to-DC Controller with Tracking Data Sheet (Rev C, 10/2012) (pdf, 685 kB) Data Sheets 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
    ADP1829 Reference Design  (pdf, 1793 kB)
    Two Output Voltages: 3.3 V, 1.0 V; Output Current: 3.0 A, 8.0 A; Input voltage: 10.8 V – 13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    ADP1829, ADP210x, ADP171x Reference Design  (pdf, 447 kB)
    Seven Output Voltages: 5.0 V, 3.6 V, 3.3 V, 2.5 V, 1.8 V, 1.2 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    ADP1829 and ADP1715 Reference Design  (pdf, 166 kB)
    Five Output Voltages: 5.0 V, 3.3 V, 3.3 V low noise, 2.5 V, 1.3 V; Output Current: 0.005 A to 1.65 A; Input voltage: 8-16 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    ADP1829, ADP210x and ADP171x Reference Design  (pdf, 687 kB)
    Seven Output Voltages: 3.6 V, 3.3 V,3.3l V 2.5 V, 1.8 V, 1.25 V, 0.9 V; Output Current: 0.002 A to 3.0 A; Input voltage: 10.8-13.2 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    ADP1829 Reference Design  (pdf, 287 kB)
    Five Output Voltages: 1.0V, 1.8V, 3.3V x 2, 5V; Output Current: 0.7A to 2.8A; Input voltage: 9-12V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    ADP1829 Reference Design  (pdf, 172 kB)
    Four Output Voltages: 7.0 V, 3.3 V, 1.8 V, 1.2 V; Output Current: 1.6 A to 12.6 A; Input voltage: 19-21 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    ADP1829 & ADP1821 Reference Design  (pdf, 309 kB)
    Five Output Voltages: 1.2 V, 1.8 V, 3.3 V, 5 V, 12 V; Output Current: 1 A to 4.5 A; Input voltage: 15.2-16.8 V; Ripple 50 mV ppk; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    ADP1829 Reference Design  (pdf, 555 kB)
    Two Output Voltages: 5.0 V, 3.3 V; Output Current: 3 A; Input voltage: 8.0-16.0 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    ADP1829 Reference Design  (pdf, 574 kB)
    Two Output Voltages: 5.0 V, 3.3 V; Output Current: 3 A; Input voltage: 8.0-16.0 V; Ripple 2% ppk of Output Voltage; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    ADP1829 Reference Design  (pdf, 679 kB)
    Two Output Voltages: 5.0 V, 3.3 V; Output Current: 1.5 A, 2.6 A; Input voltage: 10.8 V-13.2 V; Ripple 12 mV ppk; Transient step ±5%, 50% max load     		Power Reference Designs PDF
    Industrial ICs
    Industrial ICs Solutions Bulletin, Volume 10, Issue 8     		Solutions Bulletins HTML
    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

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    Price, packaging, availability

    ADP1829 Model Options
    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.

    ADP1829 Evaluation Board
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    ADP1829-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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