Diodes Incorporated AP63356 & AP63357 Synchronous Buck Converters
Diodes Incorporated AP63356 and AP63357 Synchronous Buck Converters feature 3.5A continuous output current with a 3.8V to 32V wide input range. These Diodes Incorporated converters provide high-efficiency step-down DC-DC conversion through full integration of 74mΩ high-side power MOSFET with a 40mΩ low-side power MOSFET. The design of these converters is optimized for Electromagnetic Interference (EMI) reduction, and a proprietary gate driver scheme resists switching-node ringing without sacrificing MOSFET turn-on/off times. This reduces high-frequency radiated EMI noise caused by MOSFET switching.
The AP63356 offers Pulse Width Modulation (PWM) regardless of output load, whereas the AP63357 supports Pulse Frequency Modulation (PFM) with up to 86% efficiency @5mA light load. These buck converters exhibit a protection circuitry that includes Under-Voltage Lockout (UVLO), Output Under-voltage Protection (UVP), cycle-by-cycle peak current limit, and thermal shutdown. The AP63356 and AP63357 synchronous buck converters come in an industrial standard 3mm × 2mm V-DFN3020-13 package. Typical applications include distributed power supplies, flat-screen TVs and monitors, home audio, network systems, gaming consoles, power tools, laser printers, and consumer electronics.
Features
- VIN 3.8V to 32V
- 3.5A continuous output current
- 0.8V ± 1% reference voltage
- 22µA low quiescent current (PFM)
- 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 enables the threshold to adjust UVLO
- Protection circuitry
- Undervoltage Lockout (UVLO)
- Output Undervoltage Protection (UVP)
- Cycle-by-cycle peak current limit
- Thermal shutdown
- Totally lead-free and fully RoHS compliant
- Halogen and antimony-free "Green" device
Applications
- 5V, 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
- Gaming consoles
- Consumer electronics
- General-purpose point of load
Development Tools
Diodes Incorporated AP63356/7-EVM Evaluation Boards
Evaluate the AP63356Q/AP63357Q 3.5A synchronous buck converters.
Related Products
Diodes Incorporated AP6335xQ Automotive Synchronous Buck Converters
AEC-Q100 qualified synchronous DC-DC converters with integrated high-side and low-side power MOSFET.
Typical Application Circuit
