LT3500 Ver la hoja de datos (PDF) - Linear Technology
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LT3500 Datasheet PDF : 28 Pages
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LT3500
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TJ = 25°C. VVIN = 15V, VRT/SYNC = 2V, unless otherwise specified.
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
SHDN Threshold
l 710
760
780
mV
SHDN Source Current
SHDN Current Hysterisis
VSHDN = 0.62V
1.5
2.5
3.5
μA
1.25
2
3.25
μA
Minimum Input Voltage (Note 3)
Supply Shutdown Current
Supply Quiescent Current
FB Voltage
FB Bias Current
Error Amplifier gm
Error Amplifier Source Current
Error Amplifier Sink Current
Error Amplifier High Clamp
Error Amplifier Switching Threshold
SS Source Current
SS Sink Current
SS POR Sink Current (Note 4)
SS POR Threshold
VFB = 0V
VSHDN = 0V
VFB = 0.9V
VVC = 1V
VVC = 0.8V to 1.6V, VIN = 3V to 40V
VFB = 0.8V, VVC = 1V
VVC = 1V, IVC = ±10μA
VFB = 0.6V, VVC = 1V
VFB = 1V, VVC = 1V
VFB = 0.6V
VFB = 0.6V
VSS = 0.4V, VFB = 0.9V
VFB = 0V, VSS = 2V
VFB = 0V, VSS = 2V, Cycle SHDN
l
2.4
2.8
V
l
12
30
μA
2.5
3.5
mA
l 0.784 0.8 0.816
V
l 0.776 0.8 0.824
V
50
150
nA
150
250
350 μmho
12
16
20
μA
14
18
22
μA
1.8
2.0
2.2
V
0.6
0.8
1.0
V
2.25 2.75 3.75
μA
300
600
900
μA
400
600
800
μA
50
100
150
mV
SS to FB Offset (VSS – VFB)
PG/PG Leakage
PG/PG Threshold (Rising)
PG/PG Hysteresis (Falling)
PG Sink Current
PG Sink Current
RT/SYNC Reference Voltage
Switching Frequency
SYNC Frequency Range
VVC = VFS, VSS = 0.4V
VFB = 0.9V, VPG/VPG = 40V
VPG = 0.4V
VPG = 0.4V
VPG = 0.4V, VFB = 0.7V
VPG = 0.4V, VFB = 0.9V
VFB = 0.9V, RRT/SYNC = 15k
RRT/SYNC = 90.9k
RRT/SYNC = 90.9k
RRT/SYNC = 15k
70
100
120
mV
0.1
1
μA
0.685 0.708 0.730
V
20
30
40
mV
250
500
750
μA
500
800 1100
μA
0.75 0.850 0.975
V
450
500
550
kHz
l 425
500
625
kHz
2
2.4
2.8
MHz
l 250
2500
kHz
Minimum Switch On Time
Minimum Switch Off Time
Switch Leakage Current
Switch Saturation Voltage
Switch Peak Current DD Package
VFB = 0.7V, RRT/SYNC = 90.9k
VFB = 0.7V, RRT/SYNC = 90.9k
VSW = 0V
ISW = 2A, VBST = 18V, VFB = 0.7V
VBST = 18V, VFB = 0.7V
140
ns
120
ns
1
10
μA
450
mV
2.3
2.8
3.5
A
l 2.1
2.8
3.5
A
Switch Peak Current MSE Package
VBST = 18V, VFB = 0.7V
2.3
2.9
3.5
A
l 2.1
2.9
3.7
A
Boost Current
Minimum Boost Voltage (Note 5)
ISW = 2A, VBST = 20V, VFB = 0.7V
ISW = 2A, VFB = 0.7V
20
30
45
mA
2.2
3
V
3500fc
3
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