LT1308 データシートの表示（PDF） - Linear Technology
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LT1308 Datasheet PDF : 8 Pages
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ELECTRICAL CHARACTERISTICS
Commercial Grade 0°C to 70°C. VIN = 1.1V, VSHDN = VIN, TA = 25°C unless otherwise noted.
SYMBOL PARAMETER
Low-Battery Detector Gain
Switch Leakage Current
Reverse Battery Current
CONDITIONS
1MΩ Load (25°C, 0°C)
1MΩ Load (70°C)
VSW = 5V
(Note 5)
MIN
1000
500
q
Commercial Grade TA = – 20°C, VIN = 1.1V, VSHDN = VIN, unless otherwise noted (Note 1).
SYMBOL PARAMETER
IQ
Quiescent Current
VFB
Feedback Voltage
gm
Error Amp Transconductance
AV
Error Amp Voltage Gain
fOSC
Switching Frequency
Maximum Duty Cycle
Switch VCESAT
Shutdown Pin Current
LBI Threshold Voltage
CONDITIONS
VFB = 1.3V, Not Switching
VSHDN = 0V
∆I = 5µA
ISW = 2A, VIN = 1.2V
VSHDN = VIN
VSHDN = 0V
MIN
1.195
500
180
Industrial Grade – 40°C to 85°C. VIN = 1.2V, VSHDN = VIN, TA = 25°C, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
IQ
Quiescent Current
VFB
Feedback Voltage
IB
FB Pin Bias Current (Note 2)
Reference Line Regulation
Minimum Input Voltage (– 40°C)
Not Switching
q
VSHDN = 0V
q
q
VFB = VREF
q
1.1V ≤ VIN ≤ 2V (– 40°C)
1.1V ≤ VIN ≤ 2V (85°C)
2V ≤ VIN ≤ 6V
q
Input Voltage Range
q
gm
Error Amp Transconductance
AV
Error Amp Voltage Gain
∆I = 5µA
– 40°C
85°C
fOSC
Switching Frequency
Maximum Duty Cycle
VIN = 1.3V (– 40°C)
VIN = 1.3V (85°C)
– 40°C
85°C
Switch Current Limit (Note 3)
DC = 40%
q
DC = 80%
Switch VCESAT
Burst Mode Operation Switch Current Limit
ISW = 2A (– 40°C)
ISW = 2A (85°C)
L = 3.3µH, VOUT = 3.3V
MIN
1.195
1.2
500
500
80
75
2.0
1.6
LT1308
TYP
MAX UNITS
3000
V/V
V/V
0.01
10
µA
750
mA
TYP
MAX UNITS
80
160
µA
1
3
µA
1.22
1.245
V
35
µmhos
100
V/V
600
750
kHz
88
%
300
350
mV
2.5
4.0
µA
– 1.5
– 2.5
µA
200
220
mV
TYP
MAX UNITS
80
160
µA
1
3
µA
1.22
1.245
V
27
80
nA
0.6
1.1
%/V
1.5
%/V
0.3
0.8
%/V
1.2
V
6
V
40
µmhos
100
V/V
80
V/V
600
750
kHz
600
750
kHz
88
95
%
%
2.5
A
2
A
300
350
mV
330
400
mV
200
mA
3
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