NCP3121
ELECTRICAL CHARACTERISTICS
(−40°C < T
J
< 125°C, T
J
= 25°C for typical values, V
AVIN
=12 V, V
VIN
=12 V, unless otherwise
noted. R
T
= open kW)
Characteristic
TRACK
Tracking Voltage Range
Tracking Voltage Offset
Track Bias Current
POWER GOOD
PG Threshold
PG Shutdown Mode
Feedback Voltage Rising,
EN Tied to SEQ, V
PG
= 3.3 V
Feedback Voltage Falling,
EN Tied to SEQ, V
EN,SEQ
= 0V,
V
PG
= 3.3V
Rising Edge of V
out
Falling Edge of V
out
I
(PG)
= 1 mA
45
V
PG
= 5.5 V
4.0
16
EN Tied to SEQ
EN Tied to SEQ
2.0
0.8
1.0
90% V
FB
10% V
FB
15% V
FB
20% V
FB
V
V
V
TRACK
= 0.6 V
V
TRACK
= 0.6 V
100
0
V
FB
15
500
V
mV
nA
Conditions
Min
Typ
Max
Unit
PG Delay
PG Low Level Voltage
PG Hysteresis
PG Leakage Current
ENABLE/POWER SEQUENCING
Enable Internal Pullup Current
Sequence Internal Pulldown Current
Enable Threshold High
Sequence Threshold Low
THERMAL SHUTDOWN
Overtemperature Trip Point
Hysteresis
3. DC value.
4. Guaranteed by design.
50
10
0.3
ms
ms
V
mV
mA
mA
mA
V
V
(Note 4)
160
15
°C
°C
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