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AP64350

3.8V TO 40V INPUT, 3.5A LOW IQ SYNCHRONOUS BUCK

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Description

The AP64350 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 AP64350 device is easily used by minimizing the external
component count due to its adoption of peak current mode control.


The AP64350 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. AP64350 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.

Feature(s)

  • 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
  • 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)

Application(s)

  • 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

Product Specifications

Product Parameters

Type Buck
Efficiency (%) 95 %
HS RDS(ON) (mΩ) 75 mΩ
LS RDS(ON) (mΩ) 45 mΩ
Frequency Typ (Hz) Adj. 100-2200 kHz
MinimumInput Voltage (V) 3.8 V
MaximumInput Voltage (V) 40 V
Output Current (mA) 3.5 A
Output Voltage (V) ADJ V
Quiescent Current Typ (mA) 0.022 mA
Shutdown Current Typ (µA) 1 µA

Related Content

Packages

Technical Documents

Evaluation Board User Guides

Recommended Soldering Techniques

TN1.pdf

Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
Contact Sales
Request Samples
Qty. Carrier
AP64350SP-13 Active SO-8EP (Standard) TPGP 4000 T&R Contact Sales Request Sample

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free

PCNs

Product Change Notices

PCN # Issue Date Implementation Date Subject
PCN-2520 2021-05-27 2021-08-27 Qualified Additional Bump Site and Assembly/Test (A/T) Sites