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The PAM2319 is a dual step-down current-mode, DC-DC converter. At heavy load, the constantf requency PWM control performs excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2319 provides a powersaving Pulse-Skipping Modulation (PSM) mode to reduce quiescent current under light load operation. The PAM2319 supports a range of input voltages from 2.7V to 5.5V, allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, USB, and other standard power sources. The dual output voltages are adjustable from 1.0V to 3.3V. Both channels employ internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 0.1μA. Other key features include under-voltage lockout, soft-start, short circuit protection and thermal shutdown.


  • Portable Electronics
  • Personal Information Appliances
  • Wireless and DSL Modems
  • Product Specifications

    Product Parameters

    Type Buck
    Efficiency 95 %
    HS RDS(ON) 350 mΩ
    LS RDS(ON) 350 mΩ
    Frequency Typ 3000 kHz
    Minimum Input Voltage 2.7 V
    Maximum Input Voltage 5.5 V
    Output Current 1 A
    Output Voltage ADJ(1.0 to 3.3) V
    Quiescent Current Typ 0.04 mA
    Shutdown Current Typ 0.1 µA

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    Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Countries/Regions
    PAM2319AYAA Digi-Key Electronics 3216 10/21/2020 Buy Now Europe, Asia, North America
    PAM2319AYAA Farnell, An Avnet Company 3000 10/21/2020 Buy Now England
    PAM2319AYAA Future Electronics - Europe 10 10/21/2020 England
    PAM2319AYAA Mouser Electronics Inc. 3000 10/21/2020 Buy Now South America, North America, Asia, Europe, Middle East