LT1614 查看數據表（PDF） - Linear Technology
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LT1614 Datasheet PDF : 16 Pages
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LT1614
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. Commercial Grade 0°C to 70°C. VIN = 1.5V, VSHDN = VIN unless
otherwise noted.
PARAMETER
Switch VCESAT
Shutdown Pin Current
LBI Threshold Voltage
LBO Output Low
LBO Leakage Current
LBI Input Bias Current (Note 5)
Low-Battery Detector Gain
Switch Leakage Current
CONDITIONS
ISW = 500mA (25°C, 0°C)
ISW = 500mA (70°C)
VSHDN = VIN
VSHDN = 0V
ISINK = 10µA
VLBI = 250mV, VLBO = 5V
VLBI = 150mV
1MΩ Load
VSW = 5V
MIN
190
q 185
TYP
MAX UNITS
295
350
mV
400
mV
10
20
µA
–5
– 10
µA
200
210
mV
215
mV
0.1
0.25
V
0.01
0.1
µA
10
50
nA
1000
V/V
0.01
3
µA
Industrial Grade – 40°C to 85°C. VIN = 1.5V, VSHDN = VIN unless otherwise noted.
PARAMETER
CONDITIONS
MIN
TYP
MAX UNITS
Quiescent Current
Feedback Voltage
VSHDN = 0V
1
2
mA
5
10
µA
q – 1.21 – 1.24 – 1.27
V
NFB Pin Bias Current (Note 3)
Reference Line Regulation
Minimum Input Voltage
VNFB = – 1.24V
1V ≤ VIN ≤ 2V
2V ≤ VIN ≤ 6V
– 40°C
85°C
q –2
– 4.5
– 7.5
µA
0.6
1.1
%/V
0.3
0.8
%/V
1.1
1.25
V
0.8
1.0
V
Maximum Input Voltage
q
6
V
Error Amp Transconductance
∆I = 5µA
16
µmhos
Error Amp Voltage Gain
100
V/V
Switching Frequency
q 500
600
750
kHz
Maximum Duty Cycle
q 70
80
%
Switch Current Limit (Note 4)
0.75
1.2
A
Switch VCESAT
Shutdown Pin Current
LBI Threshold Voltage
ISW = 500mA (– 40°C)
ISW = 500mA (85°C)
VSHDN = VIN
VSHDN = 0V
250
350
mV
330
400
mV
10
20
µA
–5
– 10
µA
q 180
200
220
mV
LBO Output Low
LBO Leakage Current
LBI Input Bias Current (Note 5)
Low-Battery Detector Gain
ISINK = 10µA
VLBI = 250mV, VLBO = 5V
VLBI = 150mV
1MΩ Load
0.1
0.25
V
0.1
0.3
µA
5
30
nA
1000
V/V
Switch Leakage Current
VSW = 5V
0.01
3
µA
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: The LT1614C is guaranteed to meet specified performance from
0°C to 70°C and is designed, characterized and expected to meet these
extended temperature limits, but is not tested at – 40°C and 85°C. The
LT1614I is guaranteed to meet the extended temperature limits.
Note 3: Bias current flows out of NFB pin.
Note 4: Switch current limit guaranteed by design and/or correlation to
static tests. Duty cycle affects current limit due to ramp generator.
Note 5: Bias current flows out of LBI pin.
3
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