ADI公司的ADP2323是集成了90 mΩ的高邊MOSFET的雙輸出3A 20V同步降壓電源穩壓器,輸入電壓4.5V-20V,輸出精度±1%,具有的輸出配置,雙路輸出3A/3A,并聯單輸出6A,可編程開關頻率250kHz到1.2MHz,主要用在通信基礎設備,網絡和服務器,工業和儀表,醫療保健,DC/DC POL應用等.本文介紹了ADP2323主要特性, 功能方框圖,以及多種應用電路.


圖1.ADP2323功能方框圖

圖2.ADP2323采用外接MOSFET的應用電路圖: VIN1 = VIN2 = 12 V, VOUT1 = 1.2 V, IOUT1 = 3 A, VOUT2 = 3.3 V, IOUT2 = 3 A, fSW = 500 kHz

圖3.ADP2323采用外接二極管的應用電路圖:VIN1 = VIN2 = 12 V, VOUT1 = 5 V, IOUT1 = 2 A, VOUT2 = 3.3 V, IOUT2 = 1.5 A, fSW = 600 kHz

圖4.ADP2323并聯單輸出應用電路圖:IN = 12 V, VOUT = 1.8 V, IOUT = 6 A, fSW = 600 kHz

圖5.ADP2323級聯應用電路圖: VIN1 = 12 V, VOUT1 = 5 V, IOUT1 = 2 A, VOUT2 = 1 V, IOUT2 = 3 A, fSW = 1.2 MHz

圖6.ADP2323同步90度相移應用電路圖

圖7.ADP2323 使能PFM模式應用電路圖: VIN1 = VIN2 = 9 V, VOUT1 = 1.5 V, IOUT1 = 3 A, VOUT2 = 2.5 V, IOUT2 = 3 A, fSW = 600 kHz

圖8.ADP2323可編VIN應用電路圖: VIN_RISING = 8.7 V, VIN_FALLING = 6.7 V, 3.3 V Start Up Before 1.8 V, VIN1 = VIN2 = 12 V, VOUT1 = 3.3 V, IOUT1 = 3 A, VOUT2 = 1.8 V, IOUT2 = 3 A, fSW = 300 kHz

圖9.ADP2323通路2跟蹤通路1應用電路圖:VIN1 = VIN2 = 12 V, VOUT1 = 2.5 V, IOUT1 = 3 A, VOUT2 = 1.25 V, IOUT2 = 3 A, fSW = 500 kHz