LT3682EDD 데이터 시트보기 (PDF) - Linear Technology
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LT3682EDD Datasheet PDF : 24 Pages
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LT3682
ELECTRICAL CHARACTERISTICS The l denotes specifications which apply over the full operating temperature
range, otherwise specifications are at TA = 25°C, VIN = 10V, VRUN/SS = 10V, VBD = 3.3V unless otherwise noted. (Note 3)
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VC Source Current
VC Sink Current
50
μA
50
μA
VC Pin to Switch Current Gain
VC Switching Threshold
VC Clamp Voltage
Switching Frequency
Minimum Switch Off-Time
RRT = 8.06kΩ
RRT = 29.4kΩ
RRT = 158kΩ
1.25
A/V
0.5
0.6
0.7
V
2
V
1.98
2.2
2.42
MHz
0.9
1
1.1
MHz
225
250
275
kHz
l
130
210
ns
Switch Current Limit (Note 7)
SYNC = 0V
SYNC = 3.3V or Clocked
1.45
1.7
2
A
1.18
1.4
1.66
A
Switch VCESAT
DA Pin Current to Stop OSC
ISW = 1A
460
mV
1.25
1.6
1.95
A
Switch Leakage Current
Boost Schottky Diode Voltage Drop
Boost Schottky Diode Reverse Leakage
Minimum Boost Voltage (Note 5)
VSW = 0V, VIN = 60V
IBSD = 50mA
VSW = 10V, VBD = 0
0.01
1
μA
720
850
mV
0.1
1
μA
l
1.7
2.5
V
BOOST Pin Current
RUN/SS Pin Current
RUN/SS Input Voltage High
ISW = 0.5A
VRUN/SS = 10V
10.5 17.5
mA
12
20
μA
2.5
V
RUN/SS Input Voltage Low
0.2
V
PG Leakage Current
VPG = 5V
0.1
1
μA
PG Sink Current
PG Threshold as % of VFB
PG Threshold Hysteresis
VPG = 0.4V
Measured at FB pin. FB Pin Voltage Rising
Measured at FB Pin
l 100 1000
μA
88% 90% 92%
V
12
mV
SYNC Threshold Voltage
300
550
800
mV
SYNC Input Frequency
0.3
2.2
MHz
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect the device
reliability and lifetime.
Note 2: Absolute Maximum Voltage at VIN and RUN/SS pins is 60V for
nonrepetitive 1 second transients, and 36V for continuous operation.
Note 3: The LT3682E is guaranteed to meet performance specifications from
0°C to 125°C junction temperature. Specifications over the −40°C to 125°C
operating junction temperature range are assured by design, characterization
and correlation with statistical process controls. The LT3682I is guaranteed
over the full −40°C to 125°C operating junction temperature range.
Note 4: Bias current flows out of the FB pin.
Note 5: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 6: This IC includes over-temperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when over-temperature protection is active. Continuous operation above
the specified maximum operating junction temperature may impair device
reliability.
Note 7: Current limit guaranteed by design and/or correlation to static test.
Slope compensation reduces current limit at higher duty cycles.
3682f
3
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