Datasheet Diodes AP64351Q


3.8V To 40V, 3.5A Low Iq Q-Grade Synchronous Buck With Programmable Soft Start


Datasheet AP64351Q
PDF, 1.4 Mb, Language: en, File uploaded: Jul 14, 2020, Pages: 26
Automotive-compliant, 40V, 3.5A Synchronous Buck with Programmable Soft-Start Time
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Detailed Description

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.




Parameters / ModelsAP64351QAP64351QSP-13
Efficiency95 %95 %
FrequencyAdj. 100-2200 kHzAdj. 100-2200 kHz
HS RDS(ON)80 mΩ80 mΩ
LS RDS(ON)50 mΩ50 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 Typ0.025 mA0.025 mA
Shutdown Current Typ1 µA1 µA

Model Line

Series: AP64351Q (2)

Manufacturer's Classification