3800EFE データシートの表示（PDF） - Linear Technology
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3800EFE Datasheet PDF : 24 Pages
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LT3800
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 20V, VCC = BOOST = BURST_EN = 10V, SHDN = 2V,
SENSE– = SENSE+ = 10V, SGND = PGND = SW = 0V, CTG = CBG = 3300pF, unless otherwise noted.
SYMBOL
IBOOST
VCC
IVCC
VSHDN
VSENSE
ISENSE
fO
VFB
IFB
VFB(SS)
ICSS
gm
AV
VC
IVC
VTG,BG
tTG,BG
tTG(OFF)
tTG(ON)
tNOL
PARAMETER
BOOST Supply Current (Note 6)
BOOST Burst Mode Current
BOOST Shutdown Current
Operating Voltage (Note 5)
Output Voltage
UVLO Threshold (Rising)
UVLO Hysteresis
VCC Supply Current (Note 6)
VCC Burst Mode Current
VCC Shutdown Current
Short-Circuit Current
Enable Threshold (Rising)
Threshold Hysteresis
Common Mode Range
Current Limit Sense Voltage
Reverse Protect Sense Voltage
Reverse Current Offset
Input Current
(ISENSE+ + ISENSE–)
Operating Frequency
CONDITIONS
VBURST_EN = 0V
VSHDN = 0V
VBURST_EN = 0V
VSHDN = 0V
VSENSE+ – VSENSE–
VSENSE+ – VSENSE–, VBURST_EN = VCC
VBURST_EN = 0V or VBURST_EN = VFB
VSENSE(CM) = 0V
VSENSE(CM) = 2.75V
VSENSE(CM) > 4V
Error Amp Reference Voltage
Measured at VFB Pin
Feedback Input Current
Soft-Start Disable Voltage
Soft-Start Disable Hysteresis
Soft-Start Capacitor Control Current
Error Amp Transconductance
Error Amp DC Voltage Gain
Error Amp Output Range
Error Amp Sink/Source Current
Gate Drive Output On Voltage (Note 7)
Gate Drive Output Off Voltage
Gate Drive Rise/Fall Time
Minimum Off Time
Minimum On Time
Gate Drive Nonoverlap Time
VFB Rising
Zero Current to Current Limit
10% to 90% or 90% to 10%
TG Fall to BG Rise
BG Fall to TG Rise
MIN
●
●
●
● –40
● 1.30
●0
● 140
190
● 175
1.224
● 1.215
● 275
●
TYP
1.4
0.1
0.1
8.0
6.25
500
3
80
20
– 120
1.35
120
150
– 150
10
0.8
– 20
– 0.3
200
1.231
25
1.185
300
2
350
62
1.2
±30
9.8
0.1
50
450
300
200
150
MAX
20
8.3
3.6
1.40
36
175
210
220
1.238
1.245
400
500
UNITS
mA
µA
µA
V
V
V
mV
mA
µA
µA
mA
V
mV
mV
mV
mV
mA
µA
mA
kHz
kHz
V
V
nA
V
mV
µA
µmhos
dB
V
µA
V
V
ns
ns
ns
ns
ns
3800fb
3
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