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负载开关IC的功能
下载“第Ⅳ章：本地电源IC” (PDF:770KB)
（1）欠压锁定（UVLO）
当输入电压降到规定的输入电压以下时，该功能使IC处于待机状态，使得内部电路不会不稳定发生故障。
（2）热关断（TSD）
它是一种防止因显著的环境温升而导致器件性能下降和损坏，以及防止因意外的大电流负载等而导致器件本身发热的电路。当内部温度检测电路检测到指定温度时，输出晶体管被关断。
（3）真反向电流阻断
当输入电压VIN高于输出电压VOUT时，电流从VOUT引脚流回VIN引脚。防止反向电流，保护连接到VIN端子的电源等免于性能下降和损坏。
（4）过流限制
当输出端VOUT意外短路时，它可以防止因器件本身发热而导致的性能下降和损坏。
（5）转换速率控制驱动电路
该电路将抑制开关瞬态过程中产生的浪涌电流。
（6）输出放电
在一般负载开关电路中，当输出晶体管关断时，VOUT的端子电压可以根据连接到输出端子的负载电容保持一定的时间。此电路将快速释放积聚在负载侧的电荷，并将VOUT端子电压降至IC GND左右。
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