5V-30V输入电压，
待机功耗在0.6mA
最高耐压32V
固定输出电压5V
输出频率可调，（60kHz-1MHz）
占空比百分百的
启动时间3ms
支持CV模式
SOP-8L封装。
SP1238F是一颗纯降压行的芯片，输出电流可达3A，输入电压在5-30V，固定输出5V。
The SP1238F operates in the CV(Constant output Voltage) mode, and the OCP current value is set by current sensing power resisters.
The SP1238F is suitable for the DC/DC switching power applications when requested the current limit function.
The devices are available in SOP-8L package and require very few external devices for operation.
SP1238F，固定输出电压，5V3A占空比百分百，SP1237F，SP1233FL，SP1231FL，SP1259HN，SP1253HN，
