Dual 3 MHz, 1200mA Buck Regulator with Two 300 mA LDOs

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Product Details

The ADP5034 combines two high performance buck regulators and two low dropout (LDO) regulators in a small, 24-lead 4 mm × 4 mm LFCSP (QFN) to meet demanding performance and board space requirements.

The high switching frequency of the buck regulators enables tiny multilayer external components and minimizes the board space. When the MODE pin is set high, the buck regulators operate in forced PWM mode. When the MODE pin is set low, the buck regulators operate in PWM mode when the load is around the nominal value. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving the light-load efficiency.

The two bucks operate out of phase to reduce the input capaci-tor requirement. The low quiescent current, low dropout voltage, and wide input voltage range of the ADP5034 LDOs extend the battery life of portable devices. The ADP5034 LDOs maintain power supply rejection greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage.

Regulators in the ADP5034 are activated though dedicated enable pins. The default output voltages can be externally set in the adjustable version, or factory programmable in the fixed voltage version, and can be set to a wide range of preset values


  • Power for processors, ASICS, FPGAs, and RF chipsets
  • Portable instrumentation and medical devices
  • Space constrained devices

Product Lifecycle

checked Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits


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EVAL-ADP5034 Circuit Diagram

Product Details

This user guide describes the hardware for the evaluation of the ADP5034 and includes detailed schematics and PCB layouts. The ADP5034 is available in either a 24-lead LFCSP package or a 28-lead TSSOP package. Note that UG-439 refers to the ADP5034 TSSOP evaluation board, ADP5034RE-EVALZ. Refer to UG-271 for information on the ADP5034 LFCSP.

The ADP5034 TSSOP evaluation board has two step-down regulators with two LDO regulators that enable evaluation of the ADP5034. The evaluation board is available in an adjustable voltage option.

Full details on the ADP5034 are provided in the ADP5034 data sheet available from Analog Devices, Inc., which must be consulted in conjunction with UG-439.

Tools & Simulations

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Design Tools

Reference Materials

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Design Resources

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ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well.  "Zero defects" for shipped products is always our goal.

ADP5034 Material Declaration
PCN-PDN Information Quality And Reliability Symbols and Footprints


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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.