ADI ADP2119 2A降压DC-DC电源转换方案
ADI 公司的ADP2119/ADP2120是 2A/1.25A低静态电流同步降压DC/DC电源稳压器,采用3 mm × 3 mm LFCSP_WD封装.两种器件采用恒流模式恒频PWM控制方案,具有极好的稳定性和瞬态响应.轻负载下可工作在脉冲频率调制(PFM)模式,以降低开关频率,节省功耗.输入电压从2.3V到5.5V,输出电压从0.6V到VIN,输出精度±1.5%,主要用在POL负载,通信和网络设备,工业和仪表,消费类电子和医疗设备.本文介绍了ADP2119/ADP2120主要特性, 功能方框图以及多种典型应用电路和所用元件.
The ADP2119/ADP2120 are low quiescent current, synchronous, step-down dc-to-dc regulators in a compact 3 mm × 3 mm LFCSP_WD package. Both devices use a current mode, constant frequency pulse-width modulation (PWM) control scheme for excellent stability and transient response. Under light load conditions, they can be configured to operate in a pulse frequency modulation (PFM) mode, which reduces switching frequency to save power.
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