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ADP2442:  36 V,1 A, Synchronous, Step-Down, DC-to-DC Regulator with External Clock Synchronization

Product Details

Product Status:Recommended for New Designs

The ADP2442 is a constant frequency, current mode control, synchronous, step-down, dc-to-dc regulator that is capable of driving loads of up to 1 A with excellent line and load regulation characteristics. The ADP2442 operates with a wide input voltage range from 4.5 V to 36 V, which makes it ideal for regulating power from a wide variety of sources. In addition, the ADP2442 has very low minimum on time (50 ns) and is, therefore, suitable for applications requiring a very high step-down ratio.

The output voltage can be adjusted from 0.6 V to 0.9 × VIN. High efficiency is obtained with integrated low resistance N-channel MOSFETs for both high-side and low-side devices.

The switching frequency is adjustable from 300 kHz to 1 MHz with an external resistor. The ADP2442 also has an accurate power-good (PGOOD) open-drain output signal.

The ADP2442 offers the flexibility of external clock synchronization. The switching frequency can be synchronized to an external clock, applied to the SYNC/MODE pin. The ADP2442 can also be configured to operate in the forced fixed frequency mode for low EMI or power saving mode to reduce the switching losses at light load.

The ADP2442 uses hiccup mode to protect the IC from short circuits or from overcurrent conditions on the output. The internal soft start limits inrush current during startup for a wide variety of load capacitances. Other key features include input undervoltage lockout (UVLO), thermal shutdown (TSD), and precision enable (EN), which can also be used as a logic level shutdown input.

The ADP2442 is available in a 3 mm × 3 mm, 12-lead LFCSP package and is rated for a junction temperature range from −40°C to +125°C.


  • Point of load applications
  • Distributed power systems
  • Industrial control supplies
  • Standard rail conversion to 24 V/12 V/5 V/3.3 V


  • Wide input voltage range of 4.5 V to 36 V
  • Low minimum on time of
    50 ns
  • Maximum load current of 1 A
  • High efficiency of up to 94%
  • Adjustable output down to 0.6 V
  • ±1% output voltage accuracy
  • Adjustable switching frequency of 300 kHz to
    1 MHz
  • External synchronization from 300 kHz to 1 MHz
  • Pulse skip mode or Forced fixed frequency mode
  • Precision enable input pin
  • Open-drain power good
  • See data sheet for additional features

Functional Block Diagram for ADP2442

Design Tools,Models,Drivers & Software

Title Content Type File Type
ADP244x Inverting Buck-Boost Design Tool  (zip)
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
ADP244x 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.

ADP2442 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
ADP2442-EVALZ Status: Production Evaluation Board $60.00 Yes -

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