SC1112ATSTRT Semtech, SC1112ATSTRT Datasheet - Page 5

• Manufacturer Part Number: SC1112ATSTRT
• Manufacturer: Semtech

Specifications of SC1112ATSTRT

• Lead Free Status / RoHS Status: Compliant

POWER MANAGEMENT
Timing Diagrams (Cont.)
2006 Semtech Corp.
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
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
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.
If VTT reaches 1.08V the delay
capacitor begins charging and
normal operation continues.
VTTIN
VTT
DELAY
PWRGD
VTTGATE
VTTIN
VTT
DELAY
PWRGD
VTTGATE
VTT=1.08V
VTT=1.08V
SHORT-CIRCUIT DURING NORMAL
OPERATION
VTT=0.7V
DELAY=1.5V
5
SHORT-CIRCUIT AND RECOVERY
DURING NORMAL OPERATION
VTT=0.7V
VTT=1.08V
DELAY=1.5V
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