LT1681E 查看數據表（PDF） - Linear Technology
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LT1681E Datasheet PDF : 20 Pages
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LT1681
ELECTRICAL CHARACTERISTICS
The q denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.
VCC = VBST = 12V, VBSTREF = 0V, VVC = 2V, VTS = 0V, VFB = VREF = 1.25V, CTG = CBG = CSG = 1000pF.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX
Output Drivers
VTG
TG On Voltage
TG Off Voltage
q
11
11.5
q
0.1
0.5
tTGr/f
TG Rise/Fall Times
VBG
BG On Voltage
BG Off Voltage
10% to 90%/90% to 10%
35
q
11
11.5
q
0.1
0.5
tBGr/f
BG Rise/Fall Times
VSG
SG On Voltage
SG Off Voltage
10% to 90%/90% to 10%
35
q
11
11.5
q
0.1
0.5
tSGr/f
tSG-BG
tTG-BG
SG Rise/Fall Times
SG to BG Enable Lag Time
TG to BG Enable Lag Time
10% to 90%/90% to 10%
4V On/Off Thresholds
4V On/Off Thresholds
35
q
80
150 300
100
UNITS
V
V
ns
V
V
ns
V
V
ns
ns
ns
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Supply current specification does not include external FET gate
charge currents. Actual supply currents will be higher and vary with
operating frequency, operating voltages and the type of external switch
elements used. See Applications Information.
Note 3: Guaranteed but not tested.
Note 4: The LT1681E is guaranteed to meet performance specifications
from 0°C to 70°C. Specifications over the – 40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. For guaranteed performance to
specifications over the –40°C to 85°C range, the LT1681I is available.
TYPICAL PERFOR A CE CHARACTERISTICS
ICC Supply Current
vs Temperature
20
19
VCC = 12V
18
17
16
15
–55 –40
0
40
80
TEMPERATURE (°C)
125
1681 G01
ICC Supply Current
vs SHDN Pin Voltage
1100
TA = 25°C
900
700
500
0
100 200 300 400 500
SHDN PIN VOLTAGE (mV)
1681 G02
ICC Supply Current
vs VCC Supply Voltage
18
TA = 25°C
17
16
15
9 10
12
14
16
SUPPLY VOLTAGE (V)
18
1681 G03
1681f
4
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