Diodes Menu Close
Back to Buck Converter

AP63357

3.5A Low Iq Synchronous Buck with Enhanced EMI Reduction

Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.

Description

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.

Application

  • 12V and 24V Distributed Power Bus Supplies
  • Flat Screen TV Sets and Monitors
  • Power Tools and Laser Printers
  • White Goods and Small Home Appliances
  • FPGA, DSP, and ASIC Supplies
  • Home Audio
  • Network Systems
  • Set Top Boxes
  • Gaming Consoles
  • Consumer Electronics

Features

  • 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
    • AP63356
  • Supports Pulse Frequency Modulation (PFM)
    • AP63357
    • Up to 86% Efficiency at 5mA Light Load
  • Proprietary Gate Driver Design for Best EMI Reduction
  • Frequency Spread Spectrum (FSS) to Reduce EMI
  • Low-Dropout (LDO) Mode
  • Power Good Indicator with 5MΩ Internal Pull-up
  • Precision Enable Threshold to Adjust UVLO
  • Protection Circuitry
    • Undervoltage Lockout (UVLO)
    • Output Undervoltage Protection (UVP)
    • 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 96 %
HS RDS(ON) 83 mΩ
LS RDS(ON) 43 mΩ
Frequency Typ 450 kHz
Minimum Input Voltage 3.8 V
Maximum Input Voltage 32 V
Output Current 3.5 A
Output Voltage ADJ V
Quiescent Current Typ 0.258 mA
Shutdown Current Typ 1 µA

Technical Documents

Evaluation Boards and User Guides

Recommended Soldering Techniques

TN1.pdf

RoHS CofC

Orderable Part Number Authorized Distributor Quantity Inventory Date Buy Online Region
AP63357DV-7 Digi-Key Electronics 2399 4/3/2020 Buy Now United States
AP63357DV-7 Mouser Electronics Inc. 2974 4/3/2020 Buy Now United States
AP63357DV-7 Future Electronics - Europe 20 4/2/2020 England
AP63357DV-EVM Digi-Key Electronics 3 4/3/2020 Buy Now United States