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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.

Application

  • 12V Automotive Power Systems
  • Automotive Infotainment
  • Automotive Instrument Clusters
  • Automotive Telematics
  • Advanced Driver Assistance Systems

Features

  • 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
  • Frequency Spread Spectrum (FSS) to Reduce EMI
  • 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 AP64351Q is suitable for automotive applications requiring specific change control; this part is AEC-Q100 qualified, PPAP capable, and manufactured in IATF 16949 certified facilities. https://www.diodes.com/quality/product-definitions/

Product Specifications

Product Parameters

Type Buck
Efficiency 95 %
HS RDS(ON) 80 mΩ
LS RDS(ON) 50 mΩ
Frequency Typ Adj. 100-2200 kHz
Minimum Input Voltage 3.8 V
Maximum Input Voltage 40 V
Output Current 3.5 A
Output Voltage ADJ V
Quiescent Current Typ 0.025 mA
Shutdown Current Typ 1 µA

Related Content

Packages
SO-8EP

Applications

Technical Documents

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AP64351Q Digi-Key Electronics 3990 9/27/2020 Buy Now United States
AP64351QSP-13 Digi-Key Electronics 3830 9/27/2020 Buy Now United States
AP64351QSP-EVM Digi-Key Electronics 5 9/27/2020 Buy Now United States

FAQs

Related Application FAQs