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



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.


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


  • 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


快讯名称 内容类型 文件类型
ADP2311: 双通道、1 A、18 V同步降压稳压器,集成故障安全电压监控功能 (Rev A, 03/2014) (pdf, 813 kB) 产品数据手册 PDF
ADP2311: Dual 1 A, 18 V, Synchronous Step-Down Regulator with Fail-Safe Voltage Monitoring Data Sheet (Rev A, 03/2014) (pdf, 615 kB) 产品数据手册 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:提供故障保护电压监控的双通道、1 A、18 V同步降压稳压器ADP2311的评估板  (pdf, 329 kB) 用户指导 PDF
术语表 专业词汇表 HTML


快讯名称 内容类型 文件类型
Download files for ADIsimPower™ Voltage Regulator Design Tool
The individual Excel-based voltage regulator design tools used in ADIsimPower™.
ADIsim Design/Simulation Tools HTML

输入参数值,然后点击ADIsimPower查找电源管理解决方案。 Launch of ADIsimPower Voltage Regulator Design Tool
可用系统电压 工作电压轨 负载电流
Vin (最小值) V Vin (最大值) V Vout V Iout A



原理图符号和PCB封装— ADI公司提供与当今众多CAD系统兼容的原理图符号和PCB封装(Symbols & Footprints),以便更广泛、更轻松地使用。



ADP2311 型号选项
产品型号 封装 引脚 温度范围 包装和数量 报价*(100-499) 报价*1000 pcs RoHS 查看PCN/PDN 查看库存/
ADP2311ACPZ-1-R7 产品状态: 量产 LFCSP:LEADFRM CHIP SCALE 24 工业 Reel, 1500 - $ 2.38 Y  材料信息 查看PCN 订购 样片
ADP2311ACPZ-2-R7 产品状态: 量产 LFCSP:LEADFRM CHIP SCALE 24 工业 Reel, 1500 - $ 2.38 Y  材料信息 查看PCN 订购 样片
ADP2311ACPZ-3-R7 产品状态: 量产 LFCSP:LEADFRM CHIP SCALE 24 工业 Reel, 1500 - $ 2.38 Y  材料信息 查看PCN 订购 样片
ADP2311ACPZ-4-R7 产品状态: 量产 LFCSP:LEADFRM CHIP SCALE 24 工业 Reel, 1500 - $ 2.38 Y  材料信息 查看PCN 订购 样片


ADP2311 评估板
产品型号 描述 报价 RoHS 查看PCN/PDN 查看库存/
ADP2311-1-EVALZ 产品状态: 量产 Evaluation Board $ 50.00 -
产品评价 X
content here.
content here.