By Diodes Incorporated 40
Diodes' AP63200, AP63201, AP63203, and AP63205 are 2 A synchronous buck converters with a wide input voltage range of 3.8 V to 32 V supporting 5 V, 12 V, and 24 V power supplies. Integrated 125 mΩ high-side and a 68 mΩ low-side power MOSFETs provide high-efficiency step-down DC-DC conversion. The AP63200, AP63203, and AP63205 utilize pulse frequency modulation (PFM) with an ultra-low quiescent current of 22 µA, which provides efficiencies up to 80% and 88% during light load conditions of 1 mA and 5 mA, respectively. The AP63203 and AP63205 are fixed output buck converters with optimized design for reduced electromagnetic interference (EMI). The AP63201 operates in pulse width modulation (PWM) where the switching frequency is relatively fixed regardless of output load. All members have optimized EMI, utilizing frequency spread spectrum (FSS) with a switching frequency jitter of ±6% further reduces EMI. Further EMI improvements are achieved through its proprietary gate driver scheme which reduces switching node ringing without sacrificing MOSFET turn-on and turn-off times. The device is available in a low-profile TSOT26 package.