Diodes Incorporated AP61300Q/AP61302Q Synchronous Buck Converters

Diodes Incorporated AP61300Q/AP61302Q Synchronous Buck Converters

Diodes Incorporated AP61300Q/AP61302Q Synchronous Buck Converters are automotive-compliant, 3A, converters having a wide input voltage range of 2.4V to 5.5V. These devices completely integrate a 70mΩ high-side power MOSFET and a 50mΩ low-side power MOSFET which provides high-efficiency step-down DC-DC conversion. The AP61300Q/AP61302Q buck converters can easily be used by minimizing the external component count as it adopts Constant On-Time (COT) control. The COT control helps in achieving fast transient response, easy loop stabilization, and low output voltage ripple. Applications include automotive power systems, automotive infotainment, automotive instrument clusters, automotive telematics, and Advanced Driver Assistance Systems (ADAS).


  • AEC-Q100 qualified for automotive applications
  • Device temperature grade 1: -40°C to +125°C TA range
  • VIN: 2.4V to 5.5V
  • Output voltage (VOUT): 0.6V to VIN
  • 3A continuous output current
  • 0.6V ±2% reference voltage
  • 19μA low quiescent current (Pulse Frequency Modulation)
  • 2.2MHz switching frequency (VIN = 5V, VOUT = 1.8V)
  • Up to 84% efficiency at 5mA light load
  • Programmable operation mode through EN
  • Pulse frequency modulation
  • Pulse Width modulation regardless of output load
  • Low-Dropout (LDO) mode
  • Power-good indicator:
    • AP61302Q
  • Protection circuitry
  • Undervoltage Lockout (UVLO)
  • VIN Overvoltage Protection (OVP)
  • Peak current limit
  • Valley current limit
  • Thermal shutdown

Application Circuit

Block Diagram

more information: https://www.diodes.com/part/view/AP61300Q/

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Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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