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Description

The AP64352 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 AP64352 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 AP64352 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. AP64352 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

  • 5V, 12V, and 24V Distributed Power Bus Supplies
  • Power Tools and Laser Printers
  • White Goods and Small Home Appliances
  • Home Audio
  • Network Systems
  • Consumer Electronics
  • General Purpose Point of Load

Features

  • VIN 3.8V to 40V
  • 3.5A Continuous Output Current
  • 0.8V ± 1% Reference Voltage
  • 22μA Low Quiescent Current (Pulse Frequency Modulation)
  • Programmable Switching Frequency: 100kHz to 2.2MHz
  • External Clock Synchronization: 100kHz to 2.2MHz
  • 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)

Product Specifications

Product Parameters

Type Buck
Efficiency 95 %
HS RDS(ON) 75 mΩ
LS RDS(ON) 45 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 0.022 mA
Shutdown Current Typ 1 µA

Technical Documents

Evaluation Boards and User Guides

Recommended Soldering Techniques
Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AP64352SP-13 Digi-Key Electronics 4000 11/15/2019 Buy Now United States
AP64352SP-EVM Digi-Key Electronics 3 11/15/2019 Buy Now United States