AP64350SP-13

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 high- side power MOSFET and a 45mQ 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.

Applications

• 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 loads

Key features

• VIN 3.8V to 40V
• 3.5A Continuous Output Current
• 0.8V ± 1% Reference Voltage
• 22 μA 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
• Halogen and Antimony Free
• "Green" Device