It is also widely available, cheap, resistant to RFI, and quite remarkably noise free, since it has low output dV/dT and does not generate a supply current pulse.

• 优点是应用广泛、价格便宜、抗射频干扰（RFI），而且噪声相当低（得益于输出压摆率低，不会产生开关电流）。