Diodes Incorporated

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U DFN2020 6 Type F

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PAM2305 (Not Recommended for new design)

NRND = Not Recommended for New Design


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The PAM2305 is a step-down current-mode, DC-DC converter. At heavy load, the constant frequency PWM control performs excellent stability and transient response. To ensure the longest battery life in portable applications, the PAM2305 provides a power-saving Pulse- Skipping Modulation (PSM) mode to reduce quiescent current under light load operation to save power. The PAM2305 supports a range of input voltages from 2.5V to 5.5V, allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, USB, and other standard power sources. The output voltage is adjustable from 0.6V to the input voltage, while the part number suffix PAM2305-XX indicates pre-set output voltage of 3.3V, 2.8V, 2.5V, 1.8V, 1.5V, 1.2V or adjustable. All versions 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 to prevent deep battery discharge. The PAM2305 is available in TSOT25, DFN2x2-6 Pin and QFN3x3- 16 Pin packages.


  • Cellular Phone
  • Portable Electronics
  • Wireless Devices
  • Cordless Phone
  • Computer Peripherals
  • Battery Powered Widgets
  • Electronic Scales
  • Digital Frame
  • Product Specifications

    Product Parameters

    Compliance(Only Automotive supports PPAP) Standard
    Efficiency (%) 96
    Frequency Typ (Hz) 1500
    Frequency Typ (kHz) 1500
    HS RDS(ON) (mΩ) 300
    HS RDS(ON) (mΩ) 300
    LS RDS(ON) (mΩ) 350
    LS RDS(ON) (mΩ) 350
    MaximumInput Voltage (V) 5.5
    Maximum Input Voltage (V) 5.5
    Maximum Output Voltage (V) VIN
    MinimumInput Voltage (V) 2.5
    Minimum Input Voltage (V) 2.5
    Minimum Output Voltage (V) 0.6
    Output Current (mA) 1
    Output Current (A) 1
    Output Voltage (V) ADJ(0.6 to VIN)
    Quiescent Current Typ (mA) 0.04
    Quiescent Current Typ (µA) 40
    Shutdown Current Typ (µA) 1
    Shutdown Current Typ (µA) 1
    Type Buck

    Technical Documents

    Recommended Soldering Techniques


    Product Change Notices (PCNs)

    A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

    PCN # Issue Date Implementation Date Subject
    PCN-2512 2021-04-16 2021-07-16 Qualified Additional Assembly & Test (A/T) Site