LT3681
ELECTRICAL CHARACTERISTICS
PARAMETER
Power Schottky Diode Forward Voltage
Power Schottky Diode Leakage Current
Switching Frequency
I
DA
= 1A
I
DA
= 2A
V
DC-DA
= 40V
RT = 8.66k
RT = 29.4k
RT = 187k
●
The
●
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 10V, V
RUNS/SS
= 10V V
BOOST
= 15V, V
BIAS
= 3.3V unless otherwise
noted. (Note 2)
CONDITIONS
MIN
TYP
0.50
0.56
100
2.5
1.25
250
3.2
2.8
1.4
300
130
3.8
360
0.02
●
MAX
UNITS
V
V
μA
MHz
MHz
kHz
nS
A
mV
µA
V
mA
μA
V
V
mV
mV
3.1
1.55
350
200
4.4
2
2.1
35
10
0.2
Minimum Switch Off-Time
Switch Current Limit
Switch V
CESAT
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
BOOST Pin Current
RUN/SS Pin Current
RUN/SS Input Voltage High
RUN/SS Input Voltage Low
PG Threshold Offset from Feedback Voltage
PG Hysteresis
PG Leakage
PG Sink Current
V
PG
= 5V
V
PG
= 3V
V
FB
Rising
I
SW
= 1A
V
RUN/SS
= 2.5V
Duty Cycle = 5%
I
SW
= 2A
V
SW
= 10V, V
BIAS
= 0V
1.5
18
5
2.5
122
5
0.1
1
μA
μA
●
100
600
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 device
reliability and lifetime.
Note 2:
The LT3681E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3:
Bias current flows into the FB pin.
Note 4:
This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
3681f
3
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