Conducted Noise; Voltage Tolerance - Seagate 2.5-inch, Low-profile Disc Drives LD25 Series Product Manual

2.9.1.1 Typical current profile
Figure 1. Typical 5V startup and operation current profile
2.9.2

Conducted noise

Input noise ripple is measured at the host system power supply across an equivalent 15-ohm resistive load on
the +5 volt line.
Using 5-volt power, the drive is expected to operate with a maximum of 100 mV peak-to-peak square-wave
injected noise at up to 10 MHz.
Note. Equivalent resistance is calculated by dividing the nominal voltage by the typical RMS read/write current.
2.9.3

Voltage tolerance

Voltage tolerance (including noise):
5V ± 5%
8 LD25 Series PATA Product Manual, Rev. C