LTC2952 查看數據表（PDF） - Linear Technology
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LTC2952 Datasheet PDF : 30 Pages
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LTC2952
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted.
Typical Transient Duration
vs Comparator Overdrive
(VM, KILL, PFI, M1 and M2)
10
KILL On Blanking, KILL Wait Time,
Enable Lockout Time vs Temperature
at Different Input Voltages
480
Reset Timeout Period
vs Temperature at Different
Input Voltages
260
240
440
V1 = V2 = VS = 28V
1
220
V1 = V2 = VS = 28V
COMPARATOR TRIPS
ABOVE CURVE
400
200
V1 = V2 = VS = 2.7V
0.1
V1 = V2 = VS = 2.7V
180
360
160
0.01
0.01
0.1
1
10
100
COMPARATOR OVERDRIVE VOLTAGE (% OF VTH)
2952 G10
Watchdog Time Period
vs Temperature at Different
Input Voltages
2.0
1.8
V1 = V2 = VS = 28V
1.6
V1 = V2 = VS = 2.7V
1.4
320
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
2952 G11
G1STAT, PFO, INT and RST Pull-
Down Current vs Supply Voltage
5.0
V1 = V2 = VS = VMAX
PIN AT 150mV
4.0
3.0
2.0
PIN AT 50mV
1.0
140
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
2952 G12
G1STAT, PFO, INT and RST Voltage
Output Low vs Pull-Down Current
at Different Temperatures
2.5
V1 = V2 = VS = 12V
2.0
130°C
90°C
1.5
25°C
–45°C
1.0
–60°C
0.5
1.2
–50 –25
0 25 50 75
TEMPERATURE (°C)
100 125
2952 G13
0
0 5 10 15 20 25 30
SUPPLY VOLTAGE - VMAX (V)
2952 G14
EN Pull-Down Current
vs Supply Voltage
10
V1 = V2 = VS = VMAX
EN AT 150mV
8
6
4
EN AT 50mV
2
0
0 5 10 15 20 25 30
SUPPLY VOLTAGE - VMAX (V)
2952 G16
EN Pull-Down Current
vs Supply Voltage
10000
V1 = V2 = VS = VMAX
1000
EN AT 150mV
100
EN AT 50mV
10
1
0.1
0.01
0.001
0
0.2 0.4 0.6 0.8 1 1.2 1.4 1.6
SUPPLY VOLTAGE - VMAX (V)
2952 G17
0
0 5 10 15 20 25 30
PULL DOWN CURRENT (mA)
2952 G15
EN Voltage Output Low
vs Pull-Down Current at
Different Temperatures
2.5
V1 = V2 = VS = 12V
130°C
2.0
90°C
1.5
25°C
1.0
–45°C
–60°C
0.5
0
0 10 20 30 40 50 60 70
PULL DOWN CURRENT (mA)
2952 G18
2952fa
9
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