ADP2311:  Dual 1 A, 18 V Synchronous Step-Down Regulator with Fail-safe Voltage Monitoring

Product Details

Product Status:Recommended for New Designs

The ADP2311 is a fully integrated, dual output, synchronous step-down dc-to-dc regulator. The regulator operates from input voltages of 4.5 V to 18 V, and the output can regulate down to 0.6 V. Each channel can provide up to 1 A of continuous output current.

The ADP2311 integrates the high-side and low-side MOSFETs to provide a very high efficiency, compact solution. Both channels of the regulator run at 180° out of phase to reduce the input ripple current and the input capacitor size, thereby helping to lower system electromagnetic interference (EMI). The ADP2311 also integrates internal compensation and soft start circuitry to simplify the design.

An on-chip watchdog timer can reset the microprocessor if it fails to strobe within a preset timeout period. Accurate voltage monitoring circuitry and a power fail comparator provide a controlled power-up and power-down sequence to enhance system reliability.

The ADP2311 also includes undervoltage lockout (UVLO), overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown (TSD).

The ADP2311 operates over the −40°C to +125°C junction temperature range and is available in a 24-lead LFCSP package.

APPLICATIONS

  • Industrial and instrumentation
  • Healthcare and medical
  • DC-to-dc point of load applications

FEATURES and BENEFITS

  • Input voltage: 4.5 V to 18 V
  • ±1.0% output accuracy
  • Integrated MOSFET:
    110 mΩ/ 60 mΩ typical
  • Continuous output current:
    1 A/ 1 A
  • Power fail comparator generates warning
  • Power-on reset with programmable delay timer
  • Adjustable voltage monitor for power down (channel 2)
  • Watchdog refresh input
  • Dual phase with 180° out of phase operation
  • Fixed switching frequency:
    300 kHz
  • Internal compensation and soft start
  • See data sheet for additional features

Typical Application Circuit Diagram for ADP2311

Documentation

Title Content Type File Type
ADP2311: Dual 1 A, 18 V, Synchronous Step-Down Regulator with Fail-Safe Voltage Monitoring Data Sheet (Rev A, 03/2014) (pdf, 615 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.
Videos HTML
UG-653: Evaluation Board for the ADP2311, Dual, 1 A, 18 V Synchronous Step-Down Regulator with Fail-Safe Voltage Monitoring  (pdf, 329 kB) User Guides PDF
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
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.

SampleSample & Buy

Price, packaging, availability

ADP2311 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP2311ACPZ-1-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 24 Ind Reel, 1500 - $2.38 Y  Material Info PCN Purchase Sample
ADP2311ACPZ-2-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 24 Ind Reel, 1500 - $2.38 Y  Material Info PCN Purchase Sample
ADP2311ACPZ-3-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 24 Ind Reel, 1500 - $2.38 Y  Material Info PCN Purchase Sample
ADP2311ACPZ-4-R7 Status: Production LFCSP:LEADFRM CHIP SCALE 24 Ind Reel, 1500 - $2.38 Y  Material Info PCN Purchase Sample
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.

ADP2311 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADP2311-1-EVALZ Status: Production Evaluation Board $50.00 Yes -

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