Diodes‘ AP63300 and AP63301 are 3A, synchronous buck converters with a wide input voltage range of 3.8V to 32V supporting 5V, 12V, and 24V power supplies. Integrated 75mΩ high-side and a 40mΩ low-side power MOSFETs provide high efficiency step-down DC-DC conversion.
The AP63300 utilizes Pulse Frequency Modulation (PFM) with a low quiescent current of 22μA, which provides efficiencies up to 88% at 5mA light load. The AP63301 operates in Pulse Width Modulation (PWM) where the switching frequency is fixed regardless of output load for lower output voltage ripple.
Both products are optimized for Electromagnetic Interference (EMI) reduction with a proprietary gate driver scheme to resist switching node ringing without sacrificing MOSFET turn-on and turn-off times. This controlled switching reduces high-frequency radiated EMI noise.
The AP63300 also features Frequency Spread Spectrum (FSS) with a switching frequency jitter of ±6%, which reduces EMI by not allowing emitted energy to stay at any one frequency for a significant period of time.
Features:
– Wide Output Voltage range extends duty cycle to 100%
– Low 22μA quiescent current supports standby operation in permanently-on systems with high light-load efficiency
– Minimal number of external components simplify PCB layout design
The devices are available in a low-profile TSOT26 package with the same pin out as the 2-A versions.
For details, click https://www.diodes.com/assets/product-showcases/3A-Low-IQ-Synchronous-Buck-with-Best-In-Class-EMI-Performance.pdf
Hordon Kim
International Editor, hordon@powerelectronics.co.kr
