The AX3515A is a dual high-efficiency Pulse-Width-Modulated (PWM) step-down
    DC-DC converter. It is capable of delivering 1A output current over a wide input voltage
    range from 2.5V to 5.5V, the AX3515A is ideally suited for portable electronic devices that
    are powered from 1-cell Li-ion battery or from other power sources within the range such as
    cellular phones, PDAs and other handheld devices.
    Two operational modes are available: PWM/Low-Dropout auto-switch and shutdown
    modes. Internal synchronous rectifier with low RDS(ON) dramatically reduces conduction
    loss at PWM mode. No external Schottky diode is required in practical application.
    The AX3515A enters Low-Dropout mode when normal PWM cannot provide regulated
    output voltage by continuously turning on the upper PMOS. The AX3515A enter shutdown
    mode and consumes less than 0.1μA when EN pin is pulled low.
    The switching ripple is easily smoothed-out by small package filtering elements due to
    a fixed operation frequency of 1.4MHz. This along with small TDFN-10L (3x3) package
    provides small PCB area application. Other features include soft start, lower internal
    reference voltage with 2% accuracy, over temperature protection, and over current


    Package Type TDFN10
    Input Voltage (Max) 5.5V
    Output Current 1A*2
    Output Voltage Adj(Vfb=0.6V)
    Frequency 1.4MHz
    Shutdown Current 0.1uA
    5 to 3.3V Efficiency(%) 95(0.5A)
    Availability NOW