Features and Benefits

  • 4 A continuous output current
  • 43 mΩ and 29 mΩ integrated FET
  • ±1.5% output accuracy
  • Input voltage range: 2.7 V to 6.5 V
  • Output voltage: 0.6 V to VIN
  • Switching frequency
    • Fixed frequency: 600 kHz or 1.2 MHz
    • Adjustable frequency: 500 kHz to 1.4 MHz
  • Synchronizable from 500 kHz to 1.4 MHz
  • Selectable synchronize phase shift: 0° or 180°
  • Current mode architecture
  • Precision enable input
  • Power-good output
  • Voltage tracking input
  • Integrated soft start
  • Internal compensation
  • Starts up into a precharged output
  • UVLO, OVP, OCP, and thermal shutdown
  • Available in 16-lead, 4 mm × 4 mm LFCSP package
  • Supported by ADIsimPower™ design tool

Product Details

The ADP2164 is a 4 A, synchronous, step-down dc-to-dc regulator in a compact 4 mm × 4 mm LFCSP package. The regulator uses a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response.

The input voltage range of the ADP2164 is 2.7 V to 6.5 V. The output voltage of the ADP2164 is adjustable from 0.6 V to the input voltage (VIN). The ADP2164 is also available in six preset output voltage options: 3.3 V, 2.5 V, 1.8 V, 1.5 V, 1.2 V, and 1.0 V.

The ADP2164 integrates a pair of low on-resistance P-channel and N-channel internal MOSFETs to maximize efficiency and minimize external component count. The 100% duty cycle operation allows low dropout voltage at 4 A output current.

The high, 1.2 MHz PWM switching frequency allows the use of small external components, and the SYNC input enables multiple ICs to synchronize out of phase to reduce ripple and eliminate beat frequencies.

Other key features of the ADP2164 include undervoltage lockout (UVLO), integrated soft start to limit inrush current at startup, overvoltage protection (OVP), overcurrent protection (OCP), and thermal shutdown.


  • Point-of-load conversion
  • Communications and networking equipment
  • Industrial and instrumentation
  • Consumer electronics

Product Lifecycle icon-recommended 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 (6)

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Design Tools

ADP21xx Buck Regulator Design Tool

Microsoft Excel download tool from ADIsimPower to generate a power supply design complete with a schematic, bill of materials, and performance specifications.

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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.