SG3525A PWM控制器在提供更高性能的同时减少了外部所需零部件数量，可用于控制所有类型的开关电源。片上+5.1V基准微调为+/-1%，误差放大器的输入共模电压范围包括基准电压，因此无需外部分压器电阻。振荡器的同步输入支持多个从属设备，也可让单个设备与外部系统时钟同步。通过在CT和放电引脚之间联接一个电阻，可编程较宽的死区时间范围。这款器件还具备内置软启动电路，仅再需配备一个外部计时电容器。一个关断引脚同时控制软启动电路和输出级，通过带脉冲关断的PWM锁存以及带有更长关断命令的软启动再循环，提供瞬时关断。当VCC低于标称值时，欠压锁定将禁止软启动电容器的输出和更换。输出级为图腾柱设计，可提供超过200mA的拉电流和灌电流。SG3525A的输出级采用NOR逻辑，关闭状态下可产生低输出。
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