SC1112 View Datasheet(PDF) - Semtech Corporation
Part Name
Description
MFG CO.
'SC1112' PDF : 23 Pages View PDF
POWER MANAGEMENT
Timing Diagrams (Cont.)
VTTIN
SHORT-CIRCUIT DURING NORMAL
OPERATION
VTT
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 and PWRGD goes
low. When VTT drops below DELAY
0.7V, the delay capacitor
begins charging.
If VTT is still below 0.7V when
DELAY reaches 1.5V,
VTTGATE is latched off.
VTT=1.08V
VTT=0.7V
DELAY=1.5V
PWRGD
VTTGATE
VTTIN
SHORT-CIRCUIT AND RECOVERY
DURING NORMAL OPERATION
Once VTT drops out of
regulation, VTTGATE turns on
VTT
harder to try and raise VTT.
When VTT drops below 1.08V,
the delay capacitor is discharged
and PWRGD goes low. When
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.
DELAY
If VTT reaches 1.08V the delay
capacitor begins charging and
normal operation continues.
VTT=1.08V
VTT=0.7V
VTT=1.08V
DELAY=1.5V
PWRGD
VTTGATE
2006 Semtech Corp.
5
SC1112
www.semtech.com
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