LTC2952
9
2952fb
TYPICAL PERFORMANCE CHARACTERISTICS
Typical Transient Duration
vs Comparator Overdrive
(VM, KILL, PFI, M1 and M2)
COMPARATOR OVERDRIVE VOLTAGE (% OF V
TH
)
0.1
TYPICAL TRANSIENT DURATION (ms)
1
0.01 1 10 100
2952 G10
0.01
0.1
10
COMPARATOR TRIPS
ABOVE CURVE
KILL On Blanking, KILL Wait Time,
Enable Lockout Time vs Temperature
at Different Input Voltages
–50 –25
320
360
400
440
480
25
0
75 100
2952 G11
50 125
TEMPERATURE (°C)
t
KILL, ON BLANK/
t
KILL, OFFWAIT/
t
EN, LOCKOUT
(ms)
V1 = V2 = VS = 28V
V1 = V2 = VS = 2.7V
Reset Timeout Period
vs Temperature at Different
Input Voltages
–50 –25
140
160
200
180
220
240
260
25
0
75 100
2952 G12
50 125
TEMPERATURE (°C)
t
RST
(ms)
V1 = V2 = VS = 28V
V1 = V2 = VS = 2.7V
Watchdog Time Period
vs Temperature at Different
Input Voltages
–50 –25
1.2
1.4
1.6
1.8
2.0
25
0
75 100
2952 G13
50 125
TEMPERATURE (°C)
t
WDE
(s)
V1 = V2 = VS = 28V
V1 = V2 = VS = 2.7V
G1STAT, PFO, INT and RST Pull-
Down Current vs Supply Voltage
05
0
1.0
3.0
2.0
4.0
5.0
15
10
25 30
2952 G14
20
SUPPLY VOLTAGE - V
MAX
(V)
PULLDOWN CURRENT (mA)
V1 = V2 = VS = V
MAX
PIN AT 150mV
PIN AT 50mV
G1STAT, PFO, INT and RST Voltage
Output Low vs Pull-Down Current
at Different Temperatures
05
0
0.5
1.5
1.0
2.0
2.5
15
10
25 30
2952 G15
20
PULL DOWN CURRENT (mA)
V
OL
(V)
V1 = V2 = VS = 12V
130°C
90°C
25°C
–45°C
–60°C
EN Pull-Down Current
vs Supply Voltage
05
0
2
6
4
8
10
15
10
25 30
2952 G16
20
SUPPLY VOLTAGE - V
MAX
(V)
PULLDOWN CURRENT (mA)
V1 = V2 = VS = V
MAX
EN AT 150mV
EN AT 50mV
EN Pull-Down Current
vs Supply Voltage
0 0.2
0.001
0.1
0.01
100
10
1
1000
10000
0.80.6
0.4
1.41.2 1.6
2952 G17
1
SUPPLY VOLTAGE - V
MAX
(V)
PULLDOWN CURRENT (μA)
V1 = V2 = VS = V
MAX
EN AT 150mV
EN AT 50mV
EN Voltage Output Low
vs Pull-Down Current at
Different Temperatures
010
0
0.5
1.5
1.0
2.0
2.5
30
20
60 70
2952 G18
5040
PULL DOWN CURRENT (mA)
V
EN (VOL)
(V)
V1 = V2 = VS = 12V
130°C
90°C
25°C
–45°C
–60°C
T
A
= 25°C, unless otherwise noted.
