Diodes Incorporated

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

Back to DC-DC Buck Converters - Automotive


Automotive Compliant, 32V, 2A Low IQ Synchronous Buck Converter.

Contact Sales

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


The AP63200Q/AP63201Q/AP63203Q/AP63205Q is an automotive compliant, 2A, synchronous buck converter with a wide input voltage range of 3.8V to 32V. The device fully integrates a 125mΩ high-side power MOSFET and a 68mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion. The AP63200Q/AP63201Q/AP63203Q/AP63205Q device is easily used by minimizing the external component count due to its adoption of peak current mode control along with its integrated loop compensation network. The AP63200Q/AP63201Q/AP63203Q/AP63205Q design is optimized for Electromagnetic Interference (EMI) reduction. The device has a
proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times, which reduces high frequency radiated EMI noise caused by MOSFET switching. The AP63200Q/AP63203Q/AP63205Q also features Frequency Spread Spectrum (FSS) with a switching frequency jitter of ±6%, which
reduces EMI by not allowing emitted energy to stay in any one frequency for a significant period of time. The device is available in a TSOT26 package.


  • AEC-Q100 Qualified for Automotive Applications
  • Device Temperature Grade 1: -40°C to +125°C TA Range
  • VIN: 3.8V to 32V
  • Output Voltage (VOUT)
    • 8V to VIN: AP63200Q and AP63201Q
    • Fixed 3.3V: AP63203Q
    • Fixed 5V: AP63205Q
  • 2A Continuous Output Current
  • 8V ± 1% Reference Voltage
  • 22µA Low Quiescent Current (Pulse Frequency Modulation)
  • Switching Frequency
  • 500kHz: AP63200Q and AP63201Q
  • 1100kHz: AP63203Q and AP63205Q
  • Supports Pulse Frequency Modulation (PFM)
    • AP63200Q, AP63203Q, and AP63205Q
    • Up to 88% Efficiency at 5mA Light Load
  • Pulse Width Modulation (PWM) Regardless of Output Load
    • AP63201Q
  • Proprietary Gate Driver Design for Best EMI Reduction
  • Frequency Spread Spectrum (FSS) to Reduce EMI
    • AP63200Q, AP63203Q, and AP63205Q
  • Low-Dropout (LDO) Mode
  • Precision Enable Threshold to Adjust UVLO
  • Protection Circuitry
    • Undervoltage Lockout (UVLO)
    • Output Overvoltage Protection (OVP)
    • Cycle-by-Cycle Peak Current Limit
    • Thermal Shutdown
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • The AP63200Q, AP63201Q, AP63203Q, and AP63205Q are suitable for automotive applications requiring specific change control; these parts are AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Automotive
Type Buck
Minimum Input Voltage (V) 3.8
Maximum Input Voltage (V) 32
Output Current (A) 2
Minimum Output Voltage (V) 0.8
Maximum Output Voltage (V) VIN
Quiescent Current Typ (µA) 22
Shutdown Current Typ (µA) 1
Frequency Typ (kHz) 500
HS RDS(ON) (mΩ) 125
LS RDS(ON) (mΩ) 68
Features Enable,Light Load Efficiency,Soft-start Fixed,Internal Loop Compensation,UVLO Adjustable,Frequency Spread Spectrum,OVP,Overcurrent Protection,Thermal Shutdown,Synchronous Rectification

Related Content


Technical Documents


Evaluation Boards and User Guides

Recommended Soldering Techniques