GS-R12P0331.5 데이터 시트보기 (PDF) - STMicroelectronics

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GS-R12P0331.5

1.8W TO 8W STEP-DOWN SWITCHING REGULATOR FAMILY

STMicroelectronics 

GS-R12P

Loop compensation (GS-R12H(S)0001.5 only)

If required by particular load conditions, it is possible to change the feedback loop compensation, adding an ex-

ternal capacitor between pin 6 (FB) and pin 5 (Vout-c), which will act as speed up (see figure 2).

ADDITIONAL FEATURES AND PROTECTIONS

Feedback disconnection

In case of feedback disconnection, the duty cycle increases versus the maximum allowed value, bringing the

output voltage close to the input supply.

THis condition could destroy the load.

To avoid this dangerous condition, the device is turned off if the internal feedback pin remains floating.

Output overvoltage protection

The overvoltage protection, OVP, is realized by using an internal comparator, which input is connected to the

feedback, that turns off the power stage when the OVP threshold is reached.

This threshold is typically 30% higher than the feedback voltage.

Figure 1

Figure 2

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