Datasheet Diodes AP64351


3.8V To 40V, 3.5A Low Iq Synchronous Buck


Data Brief AP64351
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3.8V To 40V, 3.5A Low Iq Synchronous Buck with Programmable Soft-start Time
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Detailed Description

The AP64351 is a 3.5A, synchronous buck converter with a wide input voltage range of 3.8V to 40V.

The device fully integrates a 75mΩ highside power MOSFET and a 45mΩ low-side power MOSFET to provide high-efficiency step-down DC-DC conversion.

The AP64351 device is easily used by minimizing the external component count due to its adoption of peak current mode control.

The AP64351 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. AP64351 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.




Parameters / ModelsAP64351SP-13AP64351SP-EVM
Efficiency95 %95 %
Frequency570 kHz570 kHz
HS RDS(ON)75 mΩ75 mΩ
LS RDS(ON)45 mΩ45 mΩ
Maximum Input Voltage40 V40 V
Minimum Input Voltage3.8 V3.8 V
Output Current3.5 A3.5 A
Output VoltageADJ VADJ V
Quiescent Current Typ0.022 mA0.022 mA
Shutdown Current Typ1 µA1 µA

Model Line

Series: AP64351 (2)

Manufacturer's Classification