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

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Product Details

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.


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

Product Lifecycle

icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

Evaluation Kits


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EVAL-ADP1829 Circuit Diagram

Product Details

This describes the design, operation, and test results obtained with the ADP1829 evaluation board. The input range for this evaluation board is 5.5 V to 18 V. The output voltages are configured for VOUT1 = 1.8 V (with a maximum current limit of 15 A) and for VOUT2 = 1.2 V (with a maximum current limit of 15 A). All of the results tested on the evaluation board ran at a switching frequency (fSW) of 300 kHz with VIN = 12 V, VOUT1 = 1.2 V at up to 15 A, and VOUT2 = 1.8 V at up to 15 A.

Tools & Simulations

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Design Tools

Reference Materials

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Design Resources

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ADP1829 Material Declaration
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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.

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Evaluation Boards Pricing displayed is based on 1-piece.
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.