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The AP64351Q is an automotive-compliant, 3.5A, synchronous buck converter with a wide input voltage range of 3.8V to 40V. The device fully integrates a 75mΩ high-side power MOSFET and a 45mΩ lowside power MOSFET to provide high-efficiency step-down DC-DC conversion.
The AP64351Q device is easily used by minimizing the external component count due to its adoption of peak current mode control.
The AP64351Q 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. AP64351Q 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 an SO-8EP package.
12V Automotive Power Systems
Automotive Instrument Clusters
Advanced Driver Assistance Systems
AEC-Q100 Qualified with the Following Results
Device Temperature Grade 1: -40°C to +125°C TA Range
Device HBM ESD Classification Level H2
Device CDM ESD Classification Level C5
VIN: 3.8V to 40V
3.5A Continuous Output Current
0.8V ± 1% Reference Voltage
22μA Low Quiescent Current (Pulse Frequency Modulation)
570kHz Switching Frequency
Programmable Soft-Start Time
Up to 85% Efficiency at 5mA Light Load
Proprietary Gate Driver Design for Best EMI Reduction