SC1112 Semtech, SC1112 Datasheet - Page 5

• Manufacturer Part Number: SC1112
• Description: Triple Low Dropout Regulator Controllers
• Manufacturer: Semtech

Once VTT drops out of
regulation, VTTGATE turns on
harder to try and raise VTT.
When VTT drops below 1.08V,
the delay capacitor is
d i s c h a r g e d a n d P W R G D g o e s
low. When VTT drops below
0.7V, the delay capacitor
begins charging.
If VTT is still below 0.7V when
DELAY reaches 1.5V,
VTTGATE is latched off.
Once VTT drops out of
regulation, VTTGATE turns on
harder to try and raise VTT.
When VTT drops below 1.08V,
the delay capacitor is discharged
a n d P W R G D g o e s l o w . W h e n
VTT drops below 0.7V, the delay
capacitor begins charging.
If VTT recovers above 0.7V
before DELAY reaches 1.5V,
DELAY is again discharged.
If VTT reaches 1.08V the delay
capacitor begins charging and
normal operation continues.
V T T I N
V T T
D E L A Y
P W R G D
V T T G A T E
V T T I N
V T T
D E L A Y
P W R G D
V T T G A T E
VTT=1.08V
VTT=1.08V
S H O R T - C I R C U I T D U R I N G N O R M A L
O P E R A T I O N
VTT=0.7V
DELAY=1.5V
S H O R T - C I R C U I T A N D R E C O V E R Y
D U R I N G N O R M A L O P E R A T I O N
VTT=0.7V
VTT=1.08V
DELAY=1.5V