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The PAM2321 is a 2A step-down converter with a typical input voltage of 3.3V and a fixed output voltage of 1.2V or an adjustable output. The 3MHz switching frequency enables the use of small external components. The ultra-small 3mmx3mm footprint and high efficiency make the PAM2321 an ideal choice for portable applications. The PAM2321 delivers 2A maximum output current while consuming only 55μA no-load quiescent current. Low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the PAM2321 the ideal choice for high output voltage, high current applications which require a low dropout threshold. The PAM2321 provides excellent transient response and output accuracy across the operating range. The PAM2321 maintains high efficiency throughout the load range. The PAM2321 automatically optimizes efficiency during light load mode (PSM) and maintains constant frequency and low output ripple during PWM mode. Over-temperature and short circuit protection safeguard the PAM2321 and system components from damage. The PAM2321 are available in Pb-free, ultrasmall, low profile, TDFN3X3-10 packages. The product is rated over a temperature range of -40°C to +85°C.


  • Cellular Phone
  • Digital Cameras
  • Hard Disk Drives
  • MP3 Players
  • PDAs and Handheld Computers
  • Portable Media Players
  • USB Devices
  • Wireless Network Cards
  • Product Specifications

    Product Parameters

    Type Buck
    Efficiency 95 %
    HS RDS(ON) 130 mΩ
    LS RDS(ON) 90 mΩ
    Frequency Typ 3000 kHz
    Minimum Input Voltage 2.7 V
    Maximum Input Voltage 5.5 V
    Output Current 2 A
    Output Voltage ADJ(1.0 to 3.3) V
    Quiescent Current Typ 0.055 mA
    Shutdown Current Typ 1 µA

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    Quality Documentation

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    Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Countries/Regions
    PAM2321AYMADJ Mouser Electronics Inc. 2938 10/25/2020 Buy Now South America, North America, Asia, Europe, Middle East