Typical application

STEF05

8/20

Doc ID 019055 Rev 4

5

Typical application

Figure 3.

Application circuit

Figure 4.

Typical HDD application circuit

5.1

Operating modes

5.1.1

Turn-on

When the input voltage is applied, the Enable/Fault pin goes up to the high state, enabling

the internal control circuitry.

After an initial delay time of typically 500 µs, the output voltage is supplied with a slope

defined by the internal dv/dt circuitry. If no additional capacitor is connected to dv/dt pin, the

total time from the Enable signal going high and the output voltage reaching the nominal

value is around 1 ms (refer to

Figure 5, 15).

AM09868v1

AM09869v1