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ADP2323:  Dual 3A, 20V Synchronous Step-Down Regulator with Integrated High-Side Mosfet

Product Details

Product Status:Recommended for New Designs

The ADP2323 is a full featured, dual output, step-down dc-to-dc regulator based on current-mode architecture. The ADP2323 integrates two high-side power MOSFETs and two low-side drivers for the external N-channel MOSFETs. The two pulse-width mod-ulation (PWM) channels can be configured to deliver dual 3 A outputs or a parallel-to-single 6 A output. The regulator operates from input voltages of 4.5 V to 20 V, and the output voltage can be as low as 0.6 V.

The switching frequency can be programmed between 250 kHz and 1.2 MHz, or synchronized to an external clock to minimize interference in multirail applications. The dual PWM channels run 180° out of phase, thereby reducing input current ripple as well as reducing the size of the input capacitor.

The bidirectional synchronization pin can be programmed at a 60°, 90°, or 120° phase shift, providing the possibility for a stackable multiphase power solution.

The ADP2323 can be set to operate in pulse-frequency modulation (PFM) mode at a light load for higher efficiency or in forced PWM for noise sensitive applications. External compensation and soft start provide design flexibility. Independent enable inputs and power good outputs provide reliable power sequencing. To enhance system reliability, the device also includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent pro-tection (OCP), and thermal shutdown (TSD).

The ADP2323 operates over the −40°C to +125°C junction temperature range and is available in a 32-lead LFCSP_WQ package.

  • Communication infrastructure
  • Networking and servers
  • Industrial and instrumentation
  • Healthcare and medical
  • Intermediate power rail conversion
  • DC-to-dc point of load applications


  • Input voltage 4.5 V to 20 V
  • ±1% output accuracy
  • Integrated 90 mΩ typical high-side MOSFET
  • Flexible output configuration
    -- Dual output: 3 A/3 A
    -- Parallel single output: 6 A
  • Programmable switching frequency: 250 kHz to 1.2 MHz
  • External synchronization input with programmable phase shift, or internal clock output
  • Selectable PWM or PFM mode operation
  • Adjustable current limit for small inductor
  • External compensation and soft start
  • Startup into precharged output

Typical Application Circuit for ADP2323


Title Content Type File Type
ADP2323: Dual 3 A, 20 V Synchronous Step-Down Regulator with Integrated High-Side MOSFET Data Sheet (Rev A, 06/2012) (pdf, 2105 kB) Data Sheets PDF
Introduction to ADIsimPower
ADIsimPower is a smart selector and a collection of downloadable tools that produce complete and optimized power designs. Schematic, bill of materials, and performance data are customized to your specific needs in minutes.
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UG-310: Evaluation Board for the ADP2323, Dual 3 A, 20 V, Synchronous Step-Down Regulator with Integrated High-Side MOSFET  (pdf, 748 kB) User Guides PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADP232x Buck Regulator Design Tool  (zip, 0)
Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.
ADIsim Design/Simulation Tools ZIP
Download files for ADIsimPower™ Voltage Regulator Design Tool
The individual Excel-based voltage regulator design tools used in ADIsimPower™.
ADIsim Design/Simulation Tools HTML
ADIsimPower™ Voltage Regulator Design Tool
This expert design tool produces custom DC-DC converter designs in about a minute. The user enters 5 inputs and chooses to optimize for efficiency, PCB space, cost, or part count. Output is a complete schematic, BOM, efficiency plot, and performance summary. A PDF summary and a blank PCB is offered for each design to facilitate fast prototyping to verify the design.
ADIsim Design/Simulation Tools HTML
Launch of ADIsimPower Voltage Regulator Selection Vin (min) V Vout V   Find Solutions
Vin (max) 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.

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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.

ADP2323 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
ADP2323-EVALZ Status: Production Evaluation Board $60.00 Yes -

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