LT1370 查看數據表（PDF） - Linear Technology
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LT1370 Datasheet PDF : 16 Pages
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LT1370
ELECTRICAL CHARACTERISTICS
VIN = 5V, VC = 0.6V, VFB = VREF, VSW, S/S and NFB pins open, TA = 25°C unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
Error Amplifier Clamp Voltage
AV
Error Amplifier Voltage Gain
VC Pin Threshold
f
Switching Frequency
Maximum Switch Duty Cycle
High Clamp, VFB = 1V
Low Clamp, VFB = 1.5V
Duty Cycle = 0%
2.7V ≤ VIN ≤ 25V
0°C ≤ TJ ≤ 125°C
– 40°C ≤ TJ ≤ 0°C (I-Grade)
1.5
0.2
0.9
460
q 440
400
q 85
Switch Current Limit Blanking Time
BV
Output Switch Breakdown Voltage
VSAT
Output Switch ON Resistance
ILIM
Switch Current Limit
LT1370
q 35
LT1370HVC, 0°C ≤ TJ ≤ 125°C
q 42
LT1370HVI, – 40°C ≤ TJ ≤ 0°C (I-Grade)
40
ISW = 6A
q
Duty Cycle = 50%
Duty Cycle = 80% (Note 1)
q6
∆IIN
Supply Current Increase During Switch ON Time
∆ISW
Control Voltage to Switch Current
Transconductance
Minimum Input Voltage
q
IQ
Supply Current
Shutdown Supply Current
Shutdown Threshold
Shutdown Delay
2.7V ≤ VIN ≤ 25V
2.7V ≤ VIN ≤ 25V, VS/S ≤ 0.6V
2.7V ≤ VIN ≤ 25V
q
q
q 0.6
q4
S/S Input Current
0V ≤ S/S ≤ 5V
q –7
Synchronization Frequency Range
q 600
TYP
1.8
0.3
500
1.1
500
500
95
130
44
47
0.065
8
7
22
10
2.4
4.5
12
1.3
12
MAX UNITS
2.30
V
0.52
V
V/ V
1.35
V
550
kHz
580
kHz
580
kHz
%
300
ns
V
V
V
0.11
Ω
10
A
A
33
mA/A
A/ V
2.7
V
6
mA
40
µA
2
V
25
µs
10
µA
800
kHz
The q denotes specifications which apply over the full operating
temperature range.
Note 1: For duty cycles (DC) between 45% and 85%, minimum switch
current limit is given by ILIM = 2.65(2.7 – DC).
3
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