Diodes Incorporated
SO 8

Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details.

Back to Buck Converter


340kHz, 3A Synchronous DC-DC Buck Converter

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.


The AP3503F is a 340kHz fixed frequency, current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 3A load with high efficiency, excellent line and load regulation. The device integrates N-channel power MOSFET switches with low on-resistance. Current mode control provides fast transient response and cycle-by-cycle current limit. The AP3503F employs complete protection to ensure system security. Including output Over Voltage Protection, input Under Voltage LockOut, programmable soft-start, Over Temperature Protection to safeguard the circuit.


  • LCD TV
  • Set Top Box
  • Portable DVD
  • Digital Photo Frame
  • Product Specifications

    Product Parameters

    Compliance(Only Automotive supports PPAP) Standard
    Type Buck
    Minimum Input Voltage (V) 4.5
    Maximum Input Voltage (V) 18
    Output Current (A) 3
    Minimum Output Voltage (V) 0.925
    Maximum Output Voltage (V) 15
    Quiescent Current Typ (µA) 1200
    Shutdown Current Typ (µA) 0.1
    Frequency Typ (kHz) 340
    HS RDS(ON) (mΩ) 100
    LS RDS(ON) (mΩ) 100

    Related Content


    Technical Documents

    Recommended Soldering Techniques