LT1683 データシートの表示（PDF） - Linear Technology
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LT1683 Datasheet PDF : 26 Pages
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LT1683
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VC = 0.9V, VFB = VREF, RVSL, RCSL = 16.9k, RT = 16.9k and
other pins open unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
IESK
Error Amp Sink Current
IESRC
Error Amp Source Current
VCLH
Error Amp Clamp Voltage
VCLL
Error Amp Clamp Voltage
AV
Error Amplifier Voltage Gain
FBOV
FB Overvoltage Shutdown
ISS
Soft-Start Charge Current
Oscillator and Sync
VFB = VREF + 150mV, VC = 0.9V
VFB = VREF – 150mV, VC = 0.9V
High Clamp, VFB = 1V
Low Clamp, VFB = 1.5V
Outputs Drivers Disabled
VSS = 1V
fMAX
Max Switch Frequency
fSYNC
Synchronization Frequency Range
Oscillator Frequency = 250kHz
VSYNC
SYNC Pin Input Threshold
RSYNC SYNC Pin Input Resistance
Gate Drives (Specifications Apply to Either A or B Unless Otherwise Noted)
DCMAX Maximum Switch Duty Cycle
RVSL = RCSL = 4.85k,
Osc Frequency = 25kHz
VGON
Gate On Voltage
VGOFF
Gate Off Voltage
IGSO
Max Gate Source Current
IGSK
Max Gate Sink Current
VINUVLO Gate Drive Undervoltage Lockout (Note 5)
Current Sense
VIN = 12, GCL = 12
VIN = 12, GCL = 8
VIN = 12V
VIN = 12V
VIN = 12V
VGCL = 6.5V, Gates Enabled
tIBL
VSENSE
Switch Current Limit Blanking Time
Sense Voltage Shutdown Voltage
VC Pulled Low
VSENSEF Sense Voltage Fault Threshold
Slew Control (for the Following Slew Tests See Test Circuit in Figure 1b)
VSLEWR Output Voltage Slew Rising Edge
VSLEWF Output Voltage Slew Falling Edge
VISLEWR Output Current Slew Rising Edge (CS Pin Voltage)
VISLEWF Output Current Slew Falling Edge (CS Pin Voltage)
Supply and Protection
RVSL = RCSL = 17k
RVSL = RCSL = 17k
RVSL = RCSL = 17k
RVSL = RCSL = 17k
VINMIN
IVIN
VSHDN
∆VSHDN
ISHDN
V5
Minimum Input Voltage (Note 4)
Supply Current (Note 2)
Shutdown Turn-On Threshold
Shutdown Turn-On Voltage Hysteresis
Shutdown Input Current Hysteresis
5V Reference Voltage
IV5SC
5V Reference Short-Circuit Current
VGCL = VIN
RVSL = RCSL = 17k , VIN = 12
RVSL = RCSL = 17k , VIN = 20
6.5V ≤ VIN ≤ 20V, IV5 = 5mA
6.5V ≤ VIN ≤ 20V, IV5 = – 5mA
VIN = 6.5V Source
VIN = 6.5V Sink
MIN TYP MAX UNITS
l 120
200
350
µA
l 120
200
350
µA
1.27
V
0.12
V
180
250
V/V
1.47
V
9.0
12
µA
250
kHz
290
kHz
l 0.7
1.4
2.0
40
kΩ
l 45
46
%
10
10.4 10.7
V
7.6
7.9
8.1
V
0.2
0.35
V
0.3
A
0.3
A
7.3
7.5
V
100
ns
l 86
103
120
mV
l
230
300
mV
26
V/µs
19
V/µs
0.21
V/µs
0.21
V/µs
l
2.55
3.6
V
l
25
45
mA
l
35
55
mA
l 1.31 1.39 1.48
V
l 50
110
180
mV
l 10
24
35
µA
4.85
5
5.20
V
4.80
5
5.15
V
10
mA
–10
mA
1683fd
3
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