4
LTC4221
4221fa
TYPICAL PERFOR A CE CHARACTERISTICS
UW
I
CC1
vs Temperature
TEMPERATURE (°C)
–50
I
CC1
(mA)
4
5
6
25 75
4221 G01
3
2
–25 0
50 100 125
1
0
V
CC2
= 1V
V
CC1
= 13.5V
V
CC1
= 12V
V
CC1
= 5V
V
CC1
= 2.7V
TEMPERATURE (°C)
–50
I
CC2
(mA)
0.175
25
4221 G02
0.100
0.050
–25 0 50
0.025
0
0.200
0.150
0.125
0.075
75 100 125
V
CC1
= 13.5V
V
CC2
= 13.5V
V
CC2
= 12V
V
CC2
= 5V
V
CC2
= 3.3V
V
CC2
= 1V
TEMPERATURE (°C)
–50
V
CC1(UVL)
(V)
2.50
25
4221 G03
2.44
2.40
–25 0 50
2.38
2.36
2.52
2.48
2.46
2.42
75 100 125
TIMER = 0.3V
RISING
FALLING
I
CC2
vs Temperature V
CC1(UVL)
vs Temperature
V
CC2(UVL)
vs Temperature
|I
SENSE2(IN)
| vs V
SENSE2
V
SENSE(FC)
vs V
CC1
TEMPERATURE (°C)
–50
0.770
V
CC2(UVL)
(V)
0.775
0.785
0.790
0.795
50
0.815
4221 G04
0.780
0
–25
75 100
25 125
0.800
0.805
0.810
TIMER = 0.3V
RISING
FALLING
V
SENSE2
(V)
0
|I
SENSE2(IN)
| (μA)
1000
6
4221 G05
1
0.01
24 8
0.001
0.0001
10000
100
10
0.1
10 12
V
CC1
= 2.7V, V
CC2
= 1V
V
CC1
= 5V, V
CC2
= 3.3V
V
CC1
= 13.5V, V
CC2
= 13.5V
V
CC1
(V)
0
V
SENSE(FC)
(mV)
101.0
101.5
102.0
610 16
4221 G06
100.5
100.0
99.5
24
8
12 14
V
CC2
= V
CC1
T
A
= 25°C
Note 1: Absolute Maximum Ratings are those values beyond which the life
of the device may be impaired.
Note 2: All current into device pins are positive. All voltages are referenced
to ground unless otherwise specified.
Note 3: An internal zener on each GATE pin clamps the charge pump
voltage to a typical maximum operating voltage of 26V. External overdrive
of either GATE pin beyond its internal zener voltage may damage the
device.
The ● indicates specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC1
= 5V, V
CC2
= 3.3V, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
t
P(FAULT-GATE)
FAULT Low to GATE
n
Discharging V
FAULT
= 3.3V to 0V ● 15 35 μs
t
P(OV-GATE)
FB
n
OV Comparator Trip to GATE
n
V
FB
n
= 0V to 1V ● 18 35 μs
Discharging
t
P(FILTER-GATE)
Filter Comparator Trip to GATE
n
V
FILTER
= 0V to 1.5V ● 15 35 μs
Discharging
t
RESET
Circuit Breaker Reset Delay Time V
ON1
< 0.4V to FAULT High ● 15 30 μs
t
P(ON-GATE)
Turn Off Propagation Delay V
ON
n
≤ 0.821V to GATE
n
Discharging ● 15 35 μs
