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The AP63356/AP63357 is a 3.5A, synchronous buck converter with a wide input voltage range of 3.8V to 32V. The device fully integrates a 74mΩ high-side power MOSFET and a 40mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion.
The AP63356/AP63357 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 AP63356/AP63357 design is optimized for Electromagnetic Interference (EMI) reduction. The converter 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. It also 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 device is available in a 3mm × 2mm V-DFN3020-13 package.
VIN 3.8V to 32V
3.5A Continuous Output Current
0.8V ± 1% Reference Voltage
22μA Ultralow Quiescent Current (Pulse Frequency Modulation)
450kHz Switching Frequency
Pulse Width Modulation (PWM) Regardless of Output Load
Supports Pulse Frequency Modulation (PFM)
Up to 86% Efficiency at 5mA Light Load
Proprietary Gate Driver Design for Best EMI Reduction