GS-R12P Datasheet, PDF (6/7 Pages) STMicroelectronics – 1.8W TO 8W STEP-DOWN SWITCHING REGULATOR FAMILY

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 (V_out-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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