Typical application

STEF12

8/20

Doc ID 019056 Rev 3

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 350 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)

AM09869v1